Management Intensive Rotational Grazing

Management Intensive Rotational Grazing (MIRG) is a stringent grazing system that moves livestock frequently between small paddocks. It is a production-focused, science-driven method based on Voisin's rational grazing principles, emphasizing precise timing of moves dictated by forage growth rates, animal performance, and planned rest periods, not fixed schedules. MIG prioritizes maximizing forage utilization and animal productivity through intensive monitoring and management.

Read More: Complete Description

Management Intensive Rotational Grazing (MIRG) is a highly refined grazing practice that goes far beyond simply moving animals between paddocks. At its core, MIG is a production-focused, science-driven system deeply rooted in the principles of rational grazing, as articulated by André Voisin. The "management intensive" aspect highlights the crucial role of continuous, detailed observation and adjustment by the farmer or rancher to optimize outcomes. Animals are moved frequently between small, deliberately designed paddocks, a strategy that mimics natural herd behavior and seeks to maximize both the utilization of available forage and the performance of the livestock.

The central tenet of MIRG is that the timing of animal movements is not dictated by a calendar or a predetermined schedule, but by the actual biological state of the forage and the condition of the livestock. This requires meticulous monitoring of pasture growth rates, pasture height, residual biomass after grazing, and individual animal performance metrics like milk production, weight gain, or condition scores. Voisin's laws of rational grazing inform these decisions, emphasizing that the grazing impact should be intense but short, followed by an adequate rest period for the plants to recover and regrow. A typical MIRG system involves very short grazing periods, often measured in hours or at most a few days, in paddocks that might range from 0.1 to 2 hectares (0.25 to 5 acres) or even smaller, depending on herd size and forage availability.

This practice stands in stark contrast to generic rotational grazing, which often involves moving animals between larger paddocks on a fixed schedule (e.g., every 3, 7, or 14 days) without intensive monitoring of plant growth. While rotational grazing can offer some benefits over continuous grazing, it lacks the precision and responsiveness that define MIRG. Similarly, MIRG is distinct from Adaptive Multi-Paddock (AMP) grazing, which emphasizes adaptive ecological decision-making across landscape scales and prioritizes ecosystem function. While MIRG can contribute to ecological regeneration, its primary driver is production efficiency and animal performance, achieved through meticulous application of Voisin's principles.

MIRG directly supports several regenerative agriculture principles. By intensely grazing forage and then allowing long rest periods, it encourages the growth of deep-rooted perennial grasses and broadleaf plants, increasing biodiversity both above and below ground (Principle 2). The frequent movement and subsequent pasture recovery keep soil covered year-round with living vegetation, minimizing bare ground and erosion (Principle 3). The emphasis on perennial plants ensures living roots are maintained in the soil for as long as possible, contributing to soil organic matter buildup and continuous nutrient cycling (Principle 4). Critically, MIRG integrates livestock strategically (Principle 5), using their grazing impact, manure deposition, and trampling to build soil fertility, stimulate plant growth, and enhance soil structure, rather than relying on synthetic inputs. While the intense grazing of small paddocks could potentially lead to soil disturbance if not managed carefully with appropriate rest periods and soil health considerations, the overall goal of MIRG is to enhance ecosystem function through optimized animal impact.

The benefits of MIRG are multifaceted. Economically, it has been shown to significantly increase livestock productivity (weight gain, milk yield) and land carrying capacity, often by 30-50% or more compared to less intensive grazing systems. This increased efficiency can lead to higher profitability per acre and reduce the need for supplemental feed, particularly during the growing season. In terms of soil health, MIRG promotes the development of grassland ecosystems that are more resilient to drought and extreme weather. The increased photosynthetic activity from healthy, well-managed pastures sequesters carbon, improves water infiltration and retention, reduces soil erosion, and supports a more diverse soil microbial community.

Implementing MIRG requires a significant commitment to learning, observation, and adaptation. It necessitates investment in infrastructure such as high-tensile electric fencing, water points (troughs, pipelines), and potentially laneways. The farmer or rancher must develop a keen understanding of plant physiology, soil science, and animal behavior. Decision-making is dynamic, shifting from calendar-based to biology-based. Critically, it requires a paradigm shift from viewing livestock as passive consumers to active agents in building ecosystem health and productivity. By mastering the art and science of MIRG, farmers and ranchers can unlock significant improvements in both their economic bottom line and the ecological vitality of their land.

Sources behind this view

Sources behind this view

Research

Key Points

What It Is

  • High-density herds, short grazing periods
  • Precise move timing based on forage growth
  • Mimics natural herd behavior and impact
  • Production-focused, science-driven system

How This Differs

  • Precise timing based on forage growth rates and rest periods
  • Production-focused and science-driven (Voisin's principles)
  • Not a generic term for moving animals between paddocks
  • Optimizes forage utilization and animal performance

Why Do It

  • Maximizes forage utilization and animal gains
  • Builds soil health and ecosystem function
  • Increases land carrying capacity significantly
  • Diversifies farm income stream

Know the Debate

  • Soil health improvements vary: 1-2 years in fertile areas, 3-5+ in degraded lands.
  • Primary soil organic matter drivers: hoof action & root exudates.
  • MIRG viable from 1 acre with intensive management.
  • Profitability increases with scale and intensity of adoption.
  • Requires daily observation, intensive management, and learning.
  • Infrastructure costs vary widely ($100-500+/acre).

Benefits - Financial

  • Livestock productivity +30-50%
  • Reduced feed costs by 20-40%
  • Increased land value: 10-25%
  • Higher profit per acre: $100-300

Benefits - System

  • Soil organic matter +0.5-1.5% per decade
  • Improves water infiltration 40-70%
  • Intensifies soil biology and nutrient cycling
  • Supports healthy grassland ecosystems (Principles 2, 3, 4, 5)

Risks - Financial

  • Initial infrastructure: $50-200 per acre
  • Requires learning curve; potential initial missteps
  • Reduced flexibility if infrastructure is inflexible
  • Risk of drought impacting forage availability

Risks - System

  • Can cause significant soil disturbance if rest periods short
  • Requires constant monitoring and intense management
  • Infrastructure failure can cause major animal losses
  • Inappropriate forage species can limit success

Going Deeper

Have a question about Management Intensive Rotational Grazing?
1

WHY - The Benefits

Management Intensive Rotational Grazing (MIRG) offers a synergistic approach to livestock production and land stewardship, yielding substantial improvements across soil health, economic performance, water cycles, carbon sequestration, and biodiversity. Its effectiveness...

Management Intensive Rotational Grazing (MIRG) offers a synergistic approach to livestock production and land stewardship, yielding substantial improvements across soil health, economic performance, water cycles, carbon sequestration, and biodiversity. Its effectiveness stems from its ability to precisely manage animal impact, harnessing it as a tool for ecosystem enhancement rather than a source of degradation.

Soil Health Benefits

MIRG is a powerful engine for soil regeneration. By intensely grazing high-growth-rate forage followed by extended rest periods (rest often being longer than grazing), MIRG promotes the dominance of deep-rooted perennial grasses and legumes. These plants build robust root systems that dramatically improve soil structure: increasing aggregate stability, enhancing water infiltration, and improving aeration. Studies have shown that well-managed MIRG can increase soil organic matter by 0.5-1.5% over a decade, sequestering substantial amounts of atmospheric carbon into the soil.

The increased biological activity beneath the pasture surface is profound. The diverse root systems feed a thriving soil microbial community, unlocking nutrients and making them available to plants. Animal manure and urine, when distributed evenly through frequent moves and deposited on healthy sod, become a primary source of fertility, reducing or eliminating the need for synthetic inputs. Improved soil structure and increased organic matter mean greater water-holding capacity, making pastures more resilient to drought and reducing runoff and erosion. For example, MIRG can improve water infiltration rates by 40-70% compared to continuous grazing or degraded pastures.

The impact on earthworm populations and other beneficial soil macrofauna is also significant. Healthier, deeper root systems and a more abundant surface layer of organic matter provide ideal habitat and food sources, leading to a dramatic increase in beneficial organisms that further enhance soil structure and nutrient cycling. This creates a self-reinforcing cycle: healthier soil supports more productive forages, which in turn support higher-performing livestock, which then provide better managed impact for the soil.

Economic Benefits

The economic advantages of MIRG are substantial and well-documented. By maximizing forage utilization and animal performance, MIRG can significantly increase stocking rates and overall land carrying capacity, often by 30-50% or more compared to continuously grazed systems. This higher efficiency translates directly into greater profitability per acre, as more animals can be supported on the same land base or the same number of animals can be finished faster.

Reduced reliance on supplemental feed is another major economic driver. With carefully managed pastures providing high-quality nutrition throughout the growing season, the need for costly hay, silage, or grain can be drastically reduced, particularly during spring and summer. This reduction in input costs directly enhances net farm income. Research indicates that MIRG can cut supplemental feed costs by 20-40% annually.

Furthermore, MIRG can lead to improved livestock health and performance. Animals grazing on diverse, high-quality pastures tend to gain weight faster, produce more milk, and have better reproductive rates. Reduced heat stress from managed shade (often provided by strategically managed rest periods allowing grass to grow taller or through integration with trees) also contributes to better animal welfare and productivity. The overall economic resilience of the farm is enhanced through diversification of income streams and reduced exposure to volatile input markets. Over the long term, farms utilizing MIRG typically see an increase in land value due to improved soil health and productivity.

Regenerative Systems Fit

MIRG is a foundational regenerative practice that strongly supports all five regenerative agriculture principles:

Principle 1 (Minimize Soil Disturbance): While the intense grazing of MIRG involves livestock impact, it is managed to avoid severe compaction or pugging ("poaching") by ensuring short grazing durations and adequate rest periods for soil and plant recovery. The primary disturbance is biological, not mechanical. The focus remains on maintaining a continuous vegetative cover, preventing bare soil and the associated risks of erosion and nutrient loss.

Principle 2 (Maximize Crop Diversity): MIRG encourages diverse pasture species, including various grasses, legumes, and forbs, which are selected for their growth rates, nutritional value, and resilience. This diversity above ground supports a complex and resilient soil microbial community below ground. The management strategy itself fosters diversity by allowing different plant species to express their growth cycles optimally.

Principle 3 (Keep Soil Covered): The system is designed to ensure that soil is rarely left bare. Livestock are moved before they graze forage down to a level that exposes the soil surface. The extended rest periods allow for vigorous regrowth, ensuring continuous photosynthetic activity and soil cover—critical for preventing erosion, conserving moisture, and maintaining soil temperature moderation.

Principle 4 (Maintain Living Roots): MIRG relies on perennial pasture species that maintain living roots throughout the year, or at least for the majority of the growing season. This continuous root activity fuels soil biology, sequesters carbon, and maintains soil structure, even when the plant material above ground is grazed or dormant.

Principle 5 (Integrate Livestock): Livestock are the central management tool in MIRG. Their grazing pressure is strategically applied to stimulate plant growth, cycle nutrients through manure and urine, and improve soil structure through carefully managed trampling. This integration is key to building soil organic matter and fertility, making the land more productive and resilient.

MIRG acts as a powerful catalyst for other regenerative practices. Farms implementing MIRG often find it naturally leads to an increased interest in cover cropping to extend the grazing season or further enhance soil health, silvopasture for added diversity and shade, and no-till cropping where applicable. The economic returns generated by MIRG can provide the capital and confidence needed to invest in other regenerative approaches. For farms transitioning from conventional systems, MIRG offers a pathway to improve profitability and ecological function simultaneously, establishing a strong foundation for broader regenerative adoption.

Sources behind this view

Videos & Podcasts
Community

  • Details an integrated system of Managed Intensive Rotational Grazing and rotational cropping using holistic management. It emphasizes increasing forage availability, integrating livestock (cattle, chi

  • Details an integrated system of Managed Intensive Rotational Grazing (MIRG) with crop production using no-till and mulching, incorporating chickens for pest control and fertilization, and rotating cro

Research
From the Web

  • Managed grazing systems, particularly Management Intensive Rotational Grazing (MIRG), are crucial for contract grazing, yielding more forage and higher quality than continuous grazing by promoting hea

  • Intensive grazing on irrigated pastures involves short grazing periods (1-4 days), high stocking densities (50k-500k lbs/acre), and long recovery (20-35 days). Benefits include doubled stocking rates,

  • Management-intensive grazing (MIG) improves pasture productivity and soil health by rotating animals and allowing plant regrowth. Integrated systems utilize crop residue, swath grazing, and annual/per

  • Compiles sociological studies on MIRG, covering graziers' motivations, farmer demographics, labor dynamics, community impacts, and the role of grazing networks. Explores how MIRG can support family fa

2

WHERE - Regional Considerations

Management Intensive Rotational Grazing (MIRG) is highly adaptable globally, but success hinges on tailoring management to specific climatic and botanical conditions. Key regional considerations include forage growth rates, drought resilience, winter conditions, and...

Management Intensive Rotational Grazing (MIRG) is highly adaptable globally, but success hinges on tailoring management to specific climatic and botanical conditions. Key regional considerations include forage growth rates, drought resilience, winter conditions, and species suitability.
Click Here to Look up your Region if you don't already know it

Humid Temperate Regions

Representative Locations: Midwestern United States, Western Europe (France, Germany, Netherlands), Eastern China, New Zealand Southern Islands

Climate Context: Warm summers, cool winters, distinct growing seasons, and typically ample rainfall distributed relatively evenly throughout the year. USDA Zones 4-7, Köppen Cfb/Cfa.

Species Suitability: Cool-season perennial grasses like perennial ryegrass, fescue, orchardgrass, and bromegrass thrive. Legumes such as white clover, red clover, and birdsfoot trefoil are excellent nitrogen fixers and enhance forage quality. Dairy and beef cattle, sheep, and goats perform well.

Management Adaptations: MIRG is highly effective in these regions due to rapid pasture regrowth, allowing for short grazing periods and long rest periods, often 20-40 days or more in peak season. Winter management requires planning for dormant pastures or utilizing stockpiled forage. Water infrastructure remains critical, but freeze protection is needed for pipes and troughs.

Mediterranean Regions

Representative Locations: California (USA), Southern Spain, Italy, Greece, Central Chile, Southwestern Australia

Climate Context: Hot, dry summers and mild, wet winters. Summer growth is often limited to dormant or drought-tolerant species, with peak growth in spring and fall. USDA Zones 8-10, Köppen Csa/Csb.

Species Suitability: Drought-tolerant perennial grasses like Harding grass, tall fescue, and needlegrass. Legumes like subterranean clover and burr clover are adapted to dry conditions. Sheep are particularly well-suited due to their grazing habits and ability to thrive on sparser forage. Cattle and goats can also be managed with careful season-long planning.

Management Adaptations: MIRG must focus on utilizing peak spring and fall growth. Summer grazing may require supplementary feeding or moving animals to higher elevation pastures. Drought-resilient species and soil management to maximize water infiltration are paramount. Animal density must be carefully matched to forage availability, especially during dry periods. Water conservation measures for troughs are essential.

Arid/Semi-Arid Regions

Representative Locations: Western United States plains, North Africa, Central Asia, Interior Australia, parts of South America (e.g., Patagonia)

Climate Context: Low annual precipitation (under 40 cm or 15 inches), high evaporation rates, short and often unpredictable growing seasons, and extreme temperature fluctuations. USDA Zones 6-9, Köppen BSh/BSk.

Species Suitability: Highly drought-tolerant native grasses, saltbush, saltgrass, and other arid-adapted shrubs. Management often involves extensive grazing over larger areas or strategically moving animals to follow infrequent rainfall patterns. Goats and sheep are often more successful than cattle due to their ability to browse shrubs and utilize sparser vegetation.

Management Adaptations: MIRG in these regions focuses on maximizing utilization of dormant and semi-dormant forages, extending rest periods significantly (often months), and carefully matching stocking rate to long-term carrying capacity. Water infrastructure is critical and must be designed for reliability in extreme conditions, often involving wells, pipelines, and large tanks. Conservation of scarce forage and water resources is the absolute priority. Animal performance may be lower, but sustainability is the key metric.

Cold Continental Regions

Representative Locations: Northern United States and Canada, Northern Europe, Siberia

Climate Context: Very short growing seasons, extreme summer heat, and severe winter cold. Pastures are typically productive for only 3-5 months per year. USDA Zones 2-5, Köppen Dfa/Dfb.

Species Suitability: Vigorous cool-season grasses and legumes that can establish quickly and utilize the short growing season, such as alfalfa, Siberian pea shrub, smooth brome, and orchardgrass. Pasture rotation often needs to accommodate early spring growth and fall stockpiling.

Management Adaptations: MIRG relies heavily on utilizing peak summer growth and potentially stockpiling forages for winter grazing (if feasible and conditions allow). Supplemental feeding is usually required during the long winter months. Animals may need protection from extreme cold. Planning for rapid plant growth in spring and early summer is crucial for setting up the grazing rotation.

Subtropical Regions

Representative Locations: Southeastern United States, Southern China, Eastern India, Northern Australia, Southern Brazil

Climate Context: Hot, humid summers with ample rainfall and mild winters. Long growing seasons are possible, but heat stress and disease pressure can be significant. USDA Zones 9-11, Köppen Cfa/Cwa.

Species Suitability: Warm-season perennial grasses like Bermudagrass, bahiagrass, and switchgrass are adapted to heat and humidity. Legumes like annual lespedeza and certain clovers can be integrated. Cattle thrive in these regions, especially when managed to avoid peak summer heat stress.

Management Adaptations: MIRG must account for intense summer heat, which can limit both forage growth and animal intake. Strategies include moving animals to pasture areas with more shade (natural or artificial), grazing heavily during cooler parts of the day, and ensuring access to water. Extended rest periods are often necessary during the hottest months to allow plant recovery and prevent overgrazing of heat-stressed forages. Managing parasite loads can also be a significant consideration.

Tropical Regions

Representative Locations: Southeast Asia, East Africa, Central America, Northern South America, Northern Australia

Climate Context: High temperatures year-round, with either consistent high rainfall or distinct wet and dry seasons. Photosynthesis is year-round in many areas. Köppen Af/Am/Aw.

Species Suitability: Warm-season perennial grasses like pangola grass, signal grass, and Brachiaria species are widely used. Legumes are often integrated but can be challenging to maintain a balance with aggressive tropical grasses. Cattle, especially Bos indicus breeds, are well-suited.

Management Adaptations: MIRG in the tropics focuses on managing rapid growth during the wet season and ensuring sufficient forage availability during the dry season, often through drought-tolerant species, deferred grazing, or supplemental feed. Heat stress impacts animal performance year-round, necessitating shade and water management. Managing disease and parasite prevalence is a constant challenge. Longer rest periods may be needed during periods of low moisture or extreme heat.

3

HOW - Implementation Process

Implementing Management Intensive Rotational Grazing (MIRG) is a phased approach that builds capacity over time, transforming your land and livestock management strategy. The core is moving from intuition-based decisions to data-driven, biology-informed management.

Implementing Management Intensive Rotational Grazing (MIRG) is a phased approach that builds capacity over time, transforming your land and livestock management strategy. The core is moving from intuition-based decisions to data-driven, biology-informed management.

Prerequisites

Before embarking on MIRG, consider these foundational elements:

  • Minimum Land Area: While MIRG can be adapted to small acreages, it's most impactful on plots of at least 2 hectares (5 acres) to allow for sufficient paddock division and rest.
  • Water Accessibility: Reliable, year-round water is non-negotiable. This may involve existing water sources, drilling wells, installing pipelines, or trucking water. Plan for sufficient water points to support frequent moves and high animal density.
  • Perimeter Fencing: A secure perimeter fence is essential to contain livestock within the managed system. Electric fencing is often used for internal paddocks due to its flexibility and cost-effectiveness.
  • Forage Base: While MIRG improves existing pastures, starting with a reasonable base of perennial forages (grasses, legumes) will accelerate success. Degraded or bare ground requires a restoration phase before intensive grazing.
  • Livestock Type: MIRG is adaptable to cattle, sheep, goats, and even horses or alpacas, though management nuances differ. Ensure your chosen livestock are suited to your climate and forage types.
  • Commitment to Learning: MIRG requires continuous learning about plant physiology, soil biology, animal nutrition, and weather patterns. Be prepared to invest time in observation, reading, and potentially seeking mentorship.

Phase 1: Planning and Infrastructure (Months 1-6)

This foundational phase involves designing your system and acquiring essential infrastructure.

  1. Landscape Assessment:

    • Map your land: Identify topography, water sources, existing fence lines, soil types, and areas prone to erosion or poor drainage.
    • Analyze forage: Assess your current pasture composition. Identify desirable perennial species and any invasive or undesirable plants. Estimate current carrying capacity.
    • Understand your climate: Analyze rainfall patterns, temperature extremes, and growing season length.

  2. Goal Setting:

    • Define your objectives: What do you want to achieve? (e.g., increased weight gain, reduced feed costs, improved soil health, higher stocking rates, environmental stewardship).
    • Establish key performance indicators (KPIs): How will you measure success? (e.g., pounds of gain per acre, acres per animal unit, soil organic matter percentage, water infiltration rates).

  3. Paddock Design:

    • Determine paddock size: Based on herd size, desired grazing duration (hours to a few days), and forage yield. Smaller paddocks are typically used for MIRG.
    • Plan paddock layout: Design paddocks to optimize animal movement, minimize walking distance to water, and facilitate grazing of different pasture areas. Consider creating lanes for animal movement.
    • Estimate paddock numbers: A common MIRG system might require 30-60 paddocks for a herd of 50-100 animals to allow adequate rest periods across seasons.

  4. Water System Design:

    • Calculate water needs: Based on herd size and type, and daily consumption.
    • Map water distribution: Plan placement of troughs in paddocks to ensure animals are never more than a few hundred meters from water.
    • Choose water source: Evaluate wells, springs, ponds, or municipal sources. Consider pump types (solar, wind, electric) and storage tanks.

  5. Fencing Strategy:

    • Perimeter: Ensure existing perimeter fence is robust.
    • Internal: Utilize high-tensile electric fencing for subdivision. This is cost-effective and flexible. Invest in quality insulators, energizers, and grounding systems. Plan for gate placement.
    • Consider: Permanent fencing for high-traffic areas (laneways) and electric for temporary subdivisions.

  6. Equipment Acquisition:

    • Electric fencing supplies: Wire, posts, insulators, energizer, gate handles, testers.
    • Water infrastructure: Troughs, pipes, fittings, potentially pumps.
    • Livestock handling: Scale, handling chutes, portable panels for working animals.
    • Monitoring tools: Pasture height stick/plate meter, sward stick, sward stick, grazing logbook or app.
    • Vehicle/ATV: For checking fences, moving water, and general farm tasks.

Cost of Infrastructure: This varies dramatically by region and scale. Budget USD 50-200/acre ($125-500/hectare) for basic fencing and water, potentially more for complex systems or arid regions.

Phase 2: Implementation and Initial Grazing (Months 6-12)

This phase involves establishing your paddocks and beginning the MIRG rotation.

  1. Install Infrastructure:

    • Install water pipelines and troughs according to your plan.
    • Install fencing to create your initial paddocks and laneways. Start with a manageable number of paddocks and expand as you gain experience.

  2. Animal Intake and Baseline Data:

    • Weigh livestock and assess their body condition score upon entering the system. Record initial weights and health status.

  3. First MIRG Rotation:

    • Observe Forage: Assess pasture height and growth rate. For most cool-season grasses, target grazing to ½ to ⅓ of the leaf. For warm-season grasses, this might be ½ to ⅔. Aim to leave consistent residual biomass.
    • Move Animals Frequently: Based on observation, move animals to the next paddock when they have grazed the current one to your target residual. This is often every 1-3 days, sometimes even daily or multiple times per day in high-growth conditions.
    • Monitor Animal Performance: Track weight gains, milk production, or feed intake. Note any changes in animal behavior or health.
    • Observe Pasture Recovery: Crucially, monitor how long it takes for grazed paddocks to regrow to the target grazing height. This rest period is key to MIRG. In peak season, rest might be 20-30 days; in dormant periods, it could be months.

  4. Record Keeping:

    • Maintain a detailed daily/weekly log: Paddock grazed, date in/out, stocking density, initial height, residual height, animal performance, observations on plant recovery and soil condition. This data is vital for refining your management.

  5. Continuous Learning:

    • Consult resources: Read books, attend workshops, connect with experienced MIRG practitioners.
    • Adjustments: Be prepared to experiment and adapt your grazing plan based on pasture response, animal performance, and weather.

Phase 3: Refinement and Optimization (Year 2 onwards)

MIRG is a dynamic system that requires continuous refinement.

  1. Data Analysis:

    • Review your grazing logs and performance data. Identify trends: What stocking rates are sustainable? What rest periods lead to optimal pasture recovery? Which paddocks respond best?

  2. Infrastructure Expansion/Modification:

    • Add more paddocks if needed to extend rest periods or improve flexibility.
    • Relocate or add water points if animal movement is hindered.
    • Upgrade fencing or water systems based on operational experience.

  3. Pasture Improvement:

    • Introduce diverse forage species through overseeding or renovation to increase resilience and nutritional value.
    • Manage invasive species through grazing, mechanical means, or targeted biological control.

  4. Animal Management Integration:

    • Integrate health protocols (vaccinations, parasite control) with your grazing plan.
    • Consider adaptive breeding or selection programs that favor animals suited to pasture-based systems.

  5. Soil Health Monitoring:

    • Conduct periodic soil tests for organic matter, nutrient levels, and a spade test to assess soil structure and biological activity.

Transition Timeline & Phase-Out Strategy (If Applicable)

If transitioning from conventional management, MIRG can be phased in.

  • Year 1: Begin converting 25-50% of your acreage to MIRG. Keep conventional acres separate to compare results. Focus on infrastructure development and learning the MIRG rotation. Stocking density may need to be temporarily reduced on MIRG acres to allow for infrastructure and initial infrastructure establishment.
  • Year 2: Expand MIRG to 75-100% of acreage if initial results are positive. Intensify monitoring and data analysis. You may see slight reductions in overall animal numbers initially on MIRG land as you learn precise carrying capacity, but your goal is higher performance per animal and per acre.
  • Year 3 onwards: MIRG becomes your primary grazing management. Focus on optimizing rest periods, paddock design, and forage species based on accumulated data. You should see significant improvements in pasture productivity, animal performance, and soil health.
  • Phase-out of Conventional Inputs: As pasture health improves, reliance on synthetic fertilizers and supplements should naturally decrease. Monitor soil test results and forage quality to guide reductions. For example, as soil organic matter increases and legumes thrive, nitrogen fertilizer needs diminish. This should be a gradual process, not an abrupt cut-off, occurring over 2-5 years as biological function takes over.

Sources behind this view

Videos & Podcasts
Community

  • Details an integrated system of Managed Intensive Rotational Grazing and rotational cropping using holistic management. It emphasizes increasing forage availability, integrating livestock (cattle, chi

  • Details an integrated system of Managed Intensive Rotational Grazing (MIRG) with crop production using no-till and mulching, incorporating chickens for pest control and fertilization, and rotating cro

Research
From the Web

  • Intensive grazing on irrigated pastures involves short grazing periods (1-4 days), high stocking densities (50k-500k lbs/acre), and long recovery (20-35 days). Benefits include doubled stocking rates,

  • Compiles sociological studies on MIRG, covering graziers' motivations, farmer demographics, labor dynamics, community impacts, and the role of grazing networks. Explores how MIRG can support family fa

4

Know the Debate

Management Intensive Rotational Grazing (MIRG) is adaptable across various climates, but success hinges on tailored management. In humid, temperate...

Management Intensive Rotational Grazing (MIRG) is adaptable across various climates, but success hinges on tailored management. In humid, temperate regions with reliable rainfall, rapid forage regrowth allows for frequent moves and quick soil responses within 1-2 years. Conversely, semi-arid rangelands in Mediterranean or Arid zones demand longer rest periods, focus on drought-tolerant species, and patience—expecting meaningful soil benefits after 3-7 years. Infrastructure costs range from $100-$500+ per acre, influenced by scale and water availability, while labor demands 1-8+ focused hours daily regardless of acreage. Successful implementation requires committing to continuous observation and learning.

How long until soil health improvements from MIRG?
Early improvements (1-2 years)

Academic and institute sources suggest observable soil health indicators like increased plant vigor and pasture yield can appear within 1-2 grazing seasons. These early gains are often attributed to better plant growth stimulated by controlled grazing and subsequent rest.

Sources behind this view

Sources behind this view

Research
  • Pasture Growth, Production, and Quality Under Rotational and Continuous Grazing Management (opens in new window)

    This study found: A two-year study in Wisconsin compared dairy farms using management intensive rotational grazing (MIRG) with farms using continuous grazing (CON). MIRG pastures consistently provided more grass throughout the 24-week grazing season, averaging nearly double the amount of available forage (1763 lb/acre) compared to continuously grazed pastures (850 lb/acre). While protein levels were slightly higher in MIRG (16.6% vs 15.3%), fiber levels were similar. The study found that MIRG farmers managed their pastures to maintain a sweet spot of 1300-1900 lb/acre of grass, which offered a good balance of yield and nutrition. At similar grass heights, MIRG pastures provided better quality feed. The researchers concluded that the overall benefits of MIRG likely stem from a combination of practices like moving the herd frequently, interseeding legumes, and daily monitoring, rather than any single factor, in contrast to the unmanaged nature of the CON pastures.

  • Tracking Soil Health Changes in a Management-Intensive Grazing Agroecosystem (opens in new window)

    This study found: A study in Colorado looked at soil health on irrigated land that was converted from cropland to pasture managed with intensive rotational grazing (MiG) for five to six years. They found that while soil compaction increased due to cattle trampling, other soil health indicators improved. Specifically, beneficial soil microbes and enzymes (like beta-glucosidase) increased, along with the amount of carbon and nitrogen available in the soil. This was linked to less tilling and more organic matter from manure. While nutrient levels stayed mostly the same, the overall soil health was better than in earlier years. The research suggests that while MiG can improve soil biology, managing soil compaction from livestock is important for long-term soil health.

Longer-term transformation (3-5+ years)

Experienced farmers report that significant, measurable changes in soil structure, water infiltration, and organic matter take 3-5 years or more. These later improvements reflect deeper ecosystem shifts beyond immediate pasture yield.

Sources behind this view

Sources behind this view

Videos & Podcasts
Making Sense of the Differences

The timeline for MIRG-related soil health improvements depends on the starting land condition and management intensity. Fertile, humid regions with good perennial cover see quicker initial responses within 1-2 years. Degraded or arid lands require longer rest periods and slower biological recovery, potentially taking 3-7 years for deep changes. Farmers should expect visible pasture improvements sooner, but significant soil restructuring requires 3-5+ years of consistent, adaptive management.

What is the primary driver of soil organic matter increase in MIRG?
Hoof Action & Direct Incorporation

Practitioners emphasize hoof action's role in trampling plant residue and manure into the soil surface. This direct incorporation, alongside concentrated nutrient deposition from high-density grazing, is seen as key for rapid surface organic matter buildup.

Sources behind this view

Sources behind this view

Videos & Podcasts
Root Exudation & Microbial Stimulation

Academic research highlights increased root exudates and stimulated microbial activity as primary drivers. Controlled grazing and rest periods enhance root growth, feeding soil biology and driving sub-surface organic matter accumulation.

Sources behind this view

Sources behind this view

Research
  • Soil health changes following transition from an annual cropping to perennial management‐intensive grazing agroecosystem (opens in new window)

    This study found: A two-year study in the western US looked at how intensive rotational grazing (MiG) affected soil health on irrigated perennial pastures with about 230 cattle. They found that the grazing system improved soil chemistry and biology, partly by reducing salt buildup and increasing the activity of beneficial soil microbes. While soil carbon levels didn't change during the study, the improvements in soil life are seen as a good sign for future carbon increases. Soil nutrients also improved. However, the study noted that hoof pressure from the cattle did increase soil compaction. The researchers concluded that with proper management to avoid compaction, intensive grazing systems can be successful in both supporting livestock and improving soil health for environmental and economic benefits.

  • Management-intensive Grazing Affects Soil Health (opens in new window)

    This study found: A two-year study in the western US looked at how intensive grazing, using about 230 head of cattle on a pivot-irrigated pasture, affected soil health. The research found that this grazing method boosted the activity of soil microbes and enzymes, which are good signs for future soil carbon increases, even though the total soil carbon didn't change right away. However, the study also noted a drop in available phosphorus for plants and increased soil compaction from the cattle's hooves. The results suggest that well-managed intensive grazing on irrigated pastures can be a sustainable way to raise livestock while improving soil health.

Making Sense of the Differences

Both hoof action and enhanced plant growth/root exudation are vital for MIRG's soil organic matter gains. Hoof action directly incorporates surface residue and manure, feeding microbes for rapid soil carbon buildup. Simultaneously, controlled grazing stimulates root growth, fueling sub-surface biology and enhancing soil carbon over longer periods. The relative importance varies with management intensity, soil type, and climate.

What is the minimum land requirement for MIRG?
Minimum 4+ hectares (10+ acres) for efficiency

Institute and academic materials often imply MIRG is most effective on larger scales (4+ ha/10+ acres). This allows for sufficient paddock divisions and rest periods for intensive management and typical dairy herd sizes.

Sources behind this view

Sources behind this view

From the Web

  • Intensive grazing on irrigated pastures involves short grazing periods (1-4 days), high stocking densities (50k-500k lbs/acre), and long recovery (20-35 days). Benefits include doubled stocking rates, lower forage costs, better parasite control, and improved pasture diversity. It requires more daily management time and labor for moving livestock.

Viable on 1-3 acres with intensive management

Farmers successfully implement MIRG on smaller plots (1-3 acres) by increasing paddock density, using daily moves, or integrating with other enterprises. This requires higher management intensity and flexibility.

Sources behind this view

Sources behind this view

Videos & Podcasts
Making Sense of the Differences

MIRG can be successful at various scales, but management intensity must adapt. Small acreages (1-3 acres) require frequent paddock subdivision and daily animal moves, often integrating with other farm income. Larger scales (10+ acres) allow for more flexible rest periods and higher efficiencies in infrastructure, but still demand diligent monitoring and adaptive decision-making. The 'minimum' depends on management tolerance for labor and infrastructure compared to scale-based efficiencies.

5

HOW MUCH - Costs & Investment

Note: Costs shown in USD; multiply by local labor and material cost indices for your region. Labor costs vary significantly internationally.

Note: Costs shown in USD; multiply by local labor and material cost indices for your region. Labor costs vary significantly internationally.

Initial Infrastructure & Setup Costs

Cost per Hectare or 2.5 Acres Small Mid Large
Electric Fencing Supplies $100-300/ha $80-200/ha $70-150/ha
Water System (Pipes, Troughs) $150-400/ha $120-350/ha $100-250/ha
Energizer/Grounding System $30-80/ha $20-60/ha $15-40/ha
Minor Handling Facilities $50-150/ha $40-120/ha $30-100/ha
Total Initial Investment $330-930/ha $260-730/ha $215-540/ha
Most Spend* $500-700/ha $400-550/ha $300-400/ha

*Most spend = middle 60% of range based on typical conditions

Scale Key:

  • Small: 2-20 ha / 5-50 ac
  • Mid: 20-100 ha / 50-250 ac
  • Large: >100 ha / >250 ac

Why These Ranges?

Small Scale ($330-930/ha or $135-375/acre)

  • Lower end ($330-500/ha): DIY installation, existing water source nearby, basic fencing, smaller herd size utilizing existing perimeter fence.
  • Mid range ($500-700/ha): Mix of DIY and hired labor, new water sources or extensive piping, higher quality fencing materials, moderate herd size.
  • Upper end ($700-930/ha): Full custom installation, substantial water infrastructure development, high-tensile electric fencing for all subdivisions, larger herd requiring more complex systems.

Most small operations spend $500-700/ha ($200-280/acre)

Mid Scale ($260-730/ha or $105-295/acre)

  • Lower end: Efficient DIY installation, leveraging existing water infrastructure, optimized paddock layout.
  • Upper end: Significant water retrofits, professional fencing installation, moderate herd size requiring extensive system.

Most mid operations spend $400-550/ha ($160-220/acre)

Large Scale ($215-540/ha or $85-220/acre)

  • Lower end: Bulk purchasing of materials, efficient labor deployment, leveraging existing infrastructure.
  • Upper end: Comprehensive water system development, extensive internal fencing, specialized equipment for installation.

Most large operations spend $300-400/ha ($120-160/acre)

Ongoing Operational Costs (Annual)

Cost Category Small Operation Mid Operation Large Operation
Maintenance (Fencing/Water) $20-50/ha $15-40/ha $10-30/ha
Animal Health & Nutrition Variable Variable Variable
Labor (Owner/Hired) Significant Significant Significant
Total Annual Overhead ~$70-130/ha+ ~$55-110/ha+ ~$35-70/ha+

*Plus variable costs for animal health, nutrition, and labor.

Labor Intensity: MIRG is labor-intensive during the initial setup and requires consistent daily/weekly time commitment for moves and monitoring. This can range from 1-4 hours per day for small operations to 4-8+ hours per day for larger ones. The efficiency gains in animal performance often offset these labor inputs, but it requires a reallocation of time rather than necessarily an increase in external labor costs.

Transition Costs

The transition to MIRG can involve a temporary reduction in stocking density on some acres as infrastructure is built and optimal rotations are learned. This may lead to a temporary decrease in revenue of 10-20% in the first 1-2 years, particularly if moving from a system that was overstocked. However, increased efficiency and performance on MIRG acres typically recover and surpass this loss within 2-3 years.

Sources behind this view

Research
From the Web

  • Synthesizes numerous economic studies comparing MIRG to confinement systems, consistently showing higher net farm income for MIRG due to significantly lower production costs, despite potentially lower

6

REWARDS AND RISKS - Economics & Risk Factors

Implementing Management Intensive Rotational Grazing (MIRG) offers significant economic rewards but also presents risks that must be carefully managed. Understanding these trade-offs is crucial for successful adoption.

Implementing Management Intensive Rotational Grazing (MIRG) offers significant economic rewards but also presents risks that must be carefully managed. Understanding these trade-offs is crucial for successful adoption.

Economic Scenarios

Best Case Scenario: Within 2-3 years, MIRG implementation leads to a 30-50% increase in pasture carrying capacity. Animal gains improve by 20% due to better forage quality and reduced heat stress. Supplemental feed costs decrease by 30-40%. Increased efficiency allows for a higher overall stocking rate. Net farm income increases by 25-40% within 3-5 years, with land value appreciating due to enhanced productivity and soil health.

Typical Scenario: After 3-5 years, MIRG results in a 20-30% increase in carrying capacity and a 10-15% improvement in animal performance. Feed costs are reduced by 15-25%. The system becomes self-sustaining, providing consistent annual returns with lower input dependency. Net farm income sees a general upward trend of 10-20% annually, with improved profitability and reduced financial vulnerability. Infrastructure costs are amortized and pay for themselves through increased productivity.

Worst Case Scenario: Initial infrastructure installation is flawed, leading to constant repairs and water mismanagement. Poor understanding of forage growth and animal needs results in overgrazing and pasture degradation, leading to decreased carrying capacity and reduced animal performance. Unexpected environmental factors (severe drought, extreme flooding) are not adequately mitigated by the system design. Financial losses can occur due to high ongoing infrastructure maintenance, increased supplemental feeding, and potentially reduced animal numbers or performance. This scenario often arises from insufficient planning, lack of learning, or inability to adapt to local conditions.

Transition Period Risks

The transition to MIRG can be financially and operationally challenging.

  • Infrastructure Investment Overrun: Initial costs for fencing and water systems can exceed budgets due to unforeseen site conditions, material price increases, or underestimation of labor needs. Mitigation: Thorough planning, obtaining multiple quotes, and budgeting for a 15-20% contingency.
  • Reduced Initial Animal Performance/Numbers: As paddocks are developed and precise rotations learned, stocking rates might need to be temporarily reduced. This can lead to a short-term decrease in overall income. Mitigation: Phased transition, starting with a portion of the farm, and focusing on increasing performance per animal rather than just number of animals.
  • Learning Curve Productivity Dips: Misjudging rest periods or grazing intensities can lead to overgrazing (reducing plant vigor and future growth) or undergrazing (wasting forage). This impacts animal performance and pasture recovery. Mitigation: Intensive monitoring, detailed record-keeping, seeking mentorship, and committing to continuous learning.
  • Dependency on Supplemental Inputs: If MIRG is not effectively implemented, or if drought strikes early in the transition, reliance on feed supplements may remain high, negating cost-saving benefits. Mitigation: Careful matching of stocking rate to estimated forage availability, investing in drought-resilient forage species, and having flexible, responsible supplemental feeding plans.
  • Market Volatility: Fluctuations in livestock commodity prices can impact the financial viability of the system, especially during the transition phase when costs are high and returns may not yet be maximized. Mitigation: Diversifying farm income where possible, developing long-term marketing strategies, and maintaining tight cost control.

System Risks

  • Infrastructure Failure: A breach in electric fencing or a failure in the water system can lead to sudden, widespread animal escape or dehydration, causing severe financial loss and stress. Mitigation: Regular fence and water system checks, using reliable components, having backup water sources or transport plans, and carrying adequate insurance.
  • Drought or Extreme Weather: Unforeseen weather events can decimate pasture availability, forcing rapid decisions about destocking or supplemental feeding, which can strain finances. Mitigation: Maintaining drought-resilient forage species, planning for deferred grazing and stockpiling, exploring water capture and storage, and developing drought contingency plans.
  • Pasture Degradation: Incorrect grazing management (overgrazing, insufficient rest, improper species selection) can lead to a decline in pasture quality and productivity, undoing years of effort. Mitigation: Continuous learning and adaptation, strict adherence to rest periods, monitoring plant communities and soil health, and avoiding fixed schedules.
  • Animal Health Issues: Intensive grazing can sometimes increase exposure to parasites and diseases if not managed carefully. Mitigation: Integrating health management with grazing rotations, rotating through different paddocks to break parasite cycles, and consulting with veterinarians and animal health professionals.
  • Time Commitment and Labor Intensity: MIRG demands significant daily attention and consistent monitoring. For operators who are already stretched thin, it can be overwhelming. Mitigation: Prioritizing MIRG tasks, streamlining operations, investing in labor-saving infrastructure where feasible, and potentially hiring skilled help.

Sources behind this view

Videos & Podcasts
Community

  • Details an integrated system of Managed Intensive Rotational Grazing (MIRG) with crop production using no-till and mulching, incorporating chickens for pest control and fertilization, and rotating cro

Research
From the Web
7

WHO - Labor & Expertise

Management Intensive Rotational Grazing (MIRG) is highly operator-dependent, demanding a significant commitment to learning, observation, and daily management. The "farmer as a grass farmer" mindset is crucial.

Management Intensive Rotational Grazing (MIRG) is highly operator-dependent, demanding a significant commitment to learning, observation, and daily management. The "farmer as a grass farmer" mindset is crucial.

Skill Requirements

  • Observational Prowess: The ability to "read" the pasture—judging plant growth rates, height, residual biomass, and stress indicators—is paramount. This requires diligent, daily observation.
  • Decision-Making Agility: MIRG is not a set-and-forget system. Decisions on when to move animals are made daily, sometimes multiple times a day, based on dynamic conditions. This requires quick, informed decision-making.
  • Plant & Soil Knowledge: Understanding pasture species, their growth patterns, nutritional value, and response to grazing and rest is fundamental. Basic knowledge of soil science, particularly concerning organic matter, water infiltration, and microbial activity, is also vital.
  • Animal Husbandry: While MIRG focuses on pasture, understanding livestock nutrition, behavior, health, and reproductive cycles is essential for integrating animal performance goals with pasture management.
  • Infrastructure Management: Farmers must be competent in maintaining electric fences, water systems, and potentially basic handling facilities. This involves basic troubleshooting and repair skills.
  • Record Keeping: Diligent record-keeping of grazing dates, pasture conditions, animal performance, and infrastructure maintenance is crucial for analysis and refinement of the system.

Labor Intensity & Time Commitment

MIRG is generally considered more labor-intensive daily than continuously grazed systems, but the type of labor shifts. Instead of long periods of minimal oversight, MIRG requires consistent, focused engagement.

  • Daily Tasks: Moving livestock (1-2 hours, sometimes more), checking water systems, inspecting fences, monitoring pasture condition, and recording observations.
  • Weekly Tasks: Analyzing logs, planning moves for the upcoming week, minor fence/water repairs, animal health checks.
  • Seasonal Tasks: Pasture renovation, overseeding, infrastructure upgrades, weaning, health treatments.

The time commitment can range from 1-4 hours per day for smaller operations to 4-8+ hours per day for larger, multi-enterprise MIRG systems. This often means prioritizing MIRG tasks and potentially reallocating or reducing time spent on other farm activities.

Expertise Development & Sourcing

  • Mentorship: Finding experienced MIRG practitioners in your region or network is invaluable. They can offer practical advice, share lessons learned, and help troubleshoot specific challenges.
  • Workshops & Courses: Numerous organizations offer training in grazing management, holistic management, and MIRG. Investing in education is critical.
  • Reading & Research: Books by authors like André Voisin, Jim Gerrish, and Allan Savory, as well as scientific papers and extension publications, provide essential theoretical and practical knowledge.
  • Peer Networks: Farmer-to-farmer learning groups and online forums can provide support and shared problem-solving.
  • Extension Services & Consultants: Local agricultural extension services or private regenerative agriculture consultants can offer tailored advice, though MIRG expertise may vary.

International Considerations for Labor

  • Labor Costs: In regions with lower labor costs, hiring assistance for daily moves or infrastructure maintenance might be more economically feasible than in higher-cost regions.
  • DIY vs. Hired Expertise: The decision to install infrastructure (fencing, water) yourself or hire contractors will depend on local labor rates, available skills in the community, and your own time/skill capacity.
  • Cultural Practices: While MIRG principles are universal, the specific methods and timing may need adaptation to align with local agricultural traditions and norms.

MIRG works best for operators who are passionate about observing natural systems, enjoy hands-on management, and are committed to continuous learning and adaptation. It's not a set-and-forget system but a dynamic partnership with your land and livestock.

Sources behind this view

Videos & Podcasts
Community

  • Successful rotational grazing requires infrastructure (fences, water), soil testing, and adherence to short occupation/long rest periods, despite offering labor savings and improved animal health.

    Read more (opens in new window) smallfarms.cornell.edu
Research
From the Web
8

COMPATIBLE PRACTICES - Integration Opportunities

Management Intensive Rotational Grazing (MIRG) synergizes exceptionally well with a range of regenerative practices, amplifying their benefits and creating a resilient, integrated farm system.

Management Intensive Rotational Grazing (MIRG) synergizes exceptionally well with a range of regenerative practices, amplifying their benefits and creating a resilient, integrated farm system.
HIGHLY INTERRELATED OR SYNERGISTIC

Adaptive Multi-Paddock Grazing While MIRG is highly structured, AMP introduces flexibility and adaptive decision-making. MIRG provides the intensive structure, while AMP guides long-term ecological goals and seasonal adjustments.

  • Integration Benefit: MIRG’s precision ensures high forage utilization and productivity, while AMP’s adaptive strategy ensures long-term ecosystem health and resilience. Together, they form a robust, regenerative grazing approach.

Cover Cropping Cover crops can be used to extend the grazing season, improve forage quality, and build soil health in MIRG systems.

  • Integration Benefit: Grazing cover crops with MIRG planning allows for high-quality feed when perennial pastures are dormant or stressed, reducing reliance on supplemental feed. The grazing impact can also aid in residue breakdown and nutrient cycling.
SOMEWHAT INTERRELATED OR SYNERGISTIC

No-Till Cropping If MIRG is integrated into a mixed crop-livestock system, it can prepare land for no-till.

  • Integration Benefit: Livestock grazing on cover crops can chop and crimp them, creating a mulch layer that supports no-till planting of cash crops. The fertility built by grazing animals also reduces the need for synthetic fertilizers in subsequent crops.

Silvopasture Integrating trees into pastures managed with MIRG.

  • Integration Benefit: Tree rows can be incorporated into paddock designs, offering shade and shelter for livestock, improving animal comfort and performance. Grazing management can protect young trees while utilizing the forage between them. The diversified ecosystem offers multiple benefits—timber/nut income, enhanced biodiversity, and improved grazing.

Keyline Design Contouring and earth-shaping techniques for water management.

  • Integration Benefit: Keyline cultivation can help slow down and spread water across the landscape, increasing soil moisture availability for pastures. This can enhance MIRG's effectiveness, particularly in drier regions, by supporting forage growth during critical periods.

Composting & Manure Management Strategic composting or manure spreading.

  • Integration Benefit: While MIRG distributes manure naturally, targeted composting can create high-value soil amendments that can further boost pasture fertility or be used for spot improvements where needed.

Holistic Management A framework for decision-making that integrates ecological, social, and financial goals.

  • Integration Benefit: MIRG is a critical tool within a Holistic Management framework. Holistic Management provides the overarching goal-setting and decision-making processes that ensure MIRG is implemented in a way that supports the farm's broader ecological and social objectives.

Benefits of Integration:

MIRG is not a standalone silver bullet but a powerful connector. When integrated with other regenerative practices, it becomes a cornerstone of a truly regenerative farming system, maximizing ecological benefits and economic returns.

Sources behind this view

Community

  • Details an integrated system of Managed Intensive Rotational Grazing and rotational cropping using holistic management. It emphasizes increasing forage availability, integrating livestock (cattle, chi

  • Details an integrated system of Managed Intensive Rotational Grazing (MIRG) with crop production using no-till and mulching, incorporating chickens for pest control and fertilization, and rotating cro

Research
From the Web
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