One of the most common questions in livestock farming in South Africa is:

“How many animals can I run on my farm?”

It sounds like there should be a straightforward answer but there is none. There is no universal stocking rate for every farm. There is not even a fixed stocking rate for your own farm because veld productivity is always changing.

There may be a published stocking rate benchmark for your district. Your neighbours may carry a certain number of animals and recommend you do the same. There may even be a long-established stocking-rate “norm” for your own farm but none of those numbers automatically tells you accurately, today, what your farm can carry over the months ahead.

So, is there even such a thing as an optimal or ideal stocking rate?

Yes, in theory. The ideal stocking rate is simply the stocking rate that matches the grazing capacity of the veld at a particular point in time. The underlying principle is straightforward: stocking rate should always be aligned with grazing capacity.

The challenge is that grazing capacity is not fixed. It is constantly changing in response to rainfall, veld condition and management decisions that influence forage production, utilisation, trampling, and the amount of residual material left behind for recovery during rest periods.

While grazing capacity is dynamic, stocking rate is relatively fixed in the short term. Producers cannot instantly buy or sell livestock every time grazing capacity changes. As a result, the ideal balance is difficult to maintain in practice.

This means that producers are almost always in one of three situations:

• Understocked
• Overstocked
• Briefly matched to grazing capacity

In reality, the relationship between stocking rate and grazing capacity is dynamic rather than static. There is no single “correct” stocking rate that can be applied permanently. Instead, stocking rate should be viewed as a variable that needs continuous adjustment to keep pace with changing grazing capacity.

Grazing capacity, or livestock carrying capacity, is that portion of the total veld carrying capacity that can safely be consumed by your livestock in the current season. It is the current, real-time reality of the productivity of the veld.  Stocking rate is the number of animals or animal units on the land for a specific period.

How do Farmers Manage the Balance?

In practice, therefore, most producers are not trying to perfectly match stocking rate to grazing capacity. Many will stock at below grazing capacity to be on the safe side. The difficult economic reality is that understocking can be wasteful because:

• Fixed costs remain the same.
• Fewer animals means less income.

This may create constant pressure to increase numbers. Overstocking is common, though not often the result of ignorance. Usually it happens because:

1. A few wet years lead to the assumption that carrying capacity has increased permanently.
2. High livestock prices encourage expansion.
3. Selling breeding stock during drought is emotionally and financially difficult.
4. Banks and cash-flow obligations push production targets.

We need a much stronger basis for management than to simply play it safe and underutilise the productivity of the veld. We need a stronger basis for management than  to deliberately overstock the farm to utilise everything it produces. It is erroneous to believe that it is normal to “run out of grazing” during the year, even if you can buy in enough feed for your animals to see them through.

If you run out of grazing then you MUST be overstocked. That decision will jeopardise long-term veld productivity and the viability of your livestock enterprise. This is an important Herdscape distinction. It frames stocking rate as a profit lever, not a target to maximise regardless of the consequences. Maximum stocking rate is not necessarily maximum profit, more livestock can mean more turnover but more turnover does not automatically mean more profit.

A stronger basis for management is an adaptive, monitoring-led approach in which stocking decisions are reviewed regularly rather than fixed at either a permanently conservative or deliberately aggressive level.

Rainfall is the environmental factor most positively linked to carrying capacity. Annual precipitation is known to be the major determinant of primary (veld) production in Africa. Carrying capacity depends on forage availability, which is in turn related to primary production and to mean annual rainfall.

It is no coincidence, therefore, that carrying capacity benchmarks for livestock in South Africa are largely based on long term average annual rainfall. That correlation provides us with the basis for estimating how much forage is produced in the veld with the actual rainfall that you receive.

The Best Stocking Rate Is the One You Can Defend

You can defend it not because a consultant said so, not because your neighbour does it, not because a table in a Department of Agriculture publication says so but because your own records and observations of rainfall, veld condition and animal performance support your decision.

That is a much stronger basis for management.

Herdscape’s approach goes beyond definitions in making stocking rate decisions. It develops the ability to accurately use carrying capacity, grazing capacity, stocking rate, stock density and farm records as part of a decision-making system.

If you are doing this for the first time you have to start somewhere. Begin with an educated estimate of the carrying capacity of your farm. You can draw on several sources of information: official grazing capacity maps or agricultural extension guidelines, local knowledge from neighbouring farms with similar veld, historical farm records and your own observations.

None of these sources is perfect on its own but together they provide a good initial, benchmark from which to plan. The first benchmark should always be regarded as a starting point for the year ahead, to be adjusted annually, rather than as a fixed rule for posterity.

It is fair to assume at first that your carrying capacity and grazing capacity are the same. If, at any time thereafter, you feel your decisions are leading to veld degradation then you must reduce your grazing capacity benchmark for the farm, or that part of the farm. You need to know the limits.

Carrying capacity describes the long-term ability of the farm, camp or veld type to feed livestock while also maintaining the health of the soil, plants and water cycle as well as everything else that lives there.

Grazing capacity is the portion of carrying capacity that your livestock can use now, this season, without denying or damaging everything else. From now on you only need to be concerned about the grazing capacity of your farm and the individual camps or grazing areas on it. Grazing capacity is always “current”, it varies with rainfall and with management and is never “fixed”.

Your Farm Records Become the Evidence

Once you monitor actual rainfall and grazing offtake in this manner and monitor what is happening to veld condition and animal condition it will soon become apparent if you are correctly stocked on the farm. A good grazing plan therefore starts with the benchmark calculation and adjusts stocking rate according to what the veld is actually producing and how well it is recovering and regenerating.

By observing medium-term indicators such as rainfall and its distribution and effectiveness, forage production, veld condition and species composition, residual grazing after use, camp recovery during rest, livestock performance and available fodder reserves, you can detect whether grazing capacity is improving or declining.

The goal is to keep enough animals to use the forage productively while leaving enough plant material and energy reserves for recovery, resilience and next season’s growth. The more you do this the more refined and accurate the correlation between rainfall and grazing capacity becomes on your farm and in individual camps. It becomes a dependable source of management intelligence.

Grazing management is not simply a matter of putting animals inside a fenced area, leaving them to find their own food for weeks at a time, checking every now and then only that they have water and that they will still be there in the camp when it comes time to move them.

Good grazing management is planned, measured and adjusted. You should aim for animals to harvest available forage efficiently but also to leave enough plant material and root reserves for the veld to recover and improve. They will not do all that on their own.

For that reason, calculating stocking rate should be directly linked to record keeping. Your management and delegation must be set up to record how many animals grazed each camp, for how long, what the veld looked like before and after grazing and how much rain you get on that part of the farm. In time these records and observations will allow you to compare planned figures with actual outcomes and to build a more accurate farm-specific benchmark.

Calculate stocking rate using LSU, hectares, grazing capacity and stock days. Understand why your farm’s actual stocking rate matters more than a regional benchmark.

Stocking rate sounds like a simple number but it is not always a simple decision to choose what it is. Knowing how to calculate the number is only the beginning, the more important question for a livestock producer is:

What does this stocking rate mean for my veld, my animals and for my business?

A stocking rate calculated from a formula can be mathematically correct and still be a poor management decision if it ignores actual rainfall, veld condition, forage availability, animal demand and what has happened on the farm in the past.

That distinction matters.

Herdscape’s approach is to use stocking rate as a management measurement, not as a number to put on your farm and then to forget about. Deciding on a stocking rate is one of the most important grazing decisions you will make. If it is not accurate and is not monitored it will lead either to veld degradation or to lost production opportunities.

What is Stocking Rate?

Stocking rate is the number of livestock or livestock units allocated to a specified area over a defined period. In South Africa it is most often expressed as the number of hectares of grazing land needed on your farm per standard animal unit, per year. It is not the same for every farm and it needs to account for both animal numbers and animal class. The standard animal unit commonly used to standardise different classes of livestock is the Large Stock Unit (LSU).

The standard LSU defines how much feed, in energy and dry matter terms, a healthy animal unit will eat in one day. Simply put, one unit is equivalent to a 450 kg animal gaining 500 g of liveweight per day on veld.

Stocking rate can be expressed in several ways, including:

• LSU per ha
• Ha per LSU
• LSU per year
• Ha per LSU per year

If the number of animals grazing on your farm last year, say 200 LSU on 1200 ha of grazing, for example, then your stocking rate has been 1 LSU per 6 ha per year.

Stocking Rate Is Not Grazing Capacity

This is one of the most important concepts in South African grazing management.

Stocking rate describes in LSU what you are actually carrying, or what you intend to carry. Grazing capacity describes the amount of forage that the veld can safely provide to your livestock without degrading. The management objective is to keep animal demand and the productive capacity of the veld in balance.

The two numbers therefore answer different questions.

• Stocking rate: What am I carrying?
• Grazing capacity: What can the veld provide for my livestock?

The farm’s Carrying Capacity tells you how much of your veld production can safely be used for livestock production while also leaving enough for everything else that lives in or improves biodiversity in the veld ecosystem. This may come from official grazing-capacity guidelines published by the Department of Agriculture, an agricultural adviser, local veld assessments, reliable farm records or local knowledge. Carrying capacity is defined in terms of long-term average annual rainfall, but it is not fixed in practice. It will vary with actual rainfall and with management.

The portion of carrying capacity used by your livestock is the grazing capacity of the farm. It is the amount of forage in the veld used only by your livestock at the correct stocking rate. Grazing capacity is always less than the carrying capacity of your land.

The purpose of making these calculations is not to arrive at some theoretical number but to create a practical guide based on actual veld production and actual stocking rate, to maintain the balance between the two. Better decisions will follow. You will be able to ensure you have enough animals to make productive use of the forage available but not so many that the veld is degraded and loses its ability to regenerate and improve.

Step-by-Step Stocking-Rate Calculation

The simplest way to calculate your initial stocking rate is to work with the area of land you have available for grazing, with the grazing capacity of your land and to convert your livestock into LSU units. You can then compare the number of animals you plan to run with what the veld can safely carry.

1. Measure the usable grazing area.
2. Find your grazing capacity benchmark. Use the best available ha per LSU per year figure for your area, veld type and veld condition.
3. Calculate the total LSU the land can carry by dividing the usable grazing area by the grazing-capacity figure: grazing capacity limit = (usable hectares / ha per LSU), LSU.
4. Convert your livestock to LSU to show your current stocking rate in LSU.
5. Compare veld supply with current livestock demand.
6. Adjust for current rainfall and ecosystem health.

For example:

I have 1000 ha of veld for grazing, my grazing capacity is 1 LSU per 6 ha per year. I calculate, therefore, that I can carry 167 LSU on my farm i.e.:

1000 ha / 6 ha per LSU = 167 LSU.

Unless my observations of veld and animal condition tell me otherwise:

• If I have 150 LSU currently then my farm is understocked.
• If I have 190 LSU my farm is overstocked.

Stock Days Can Tell You More

One of the most useful ways to understand grazing capacity is through stock days.

• One stock day represents 1 LSU grazing for 1 day.
• If you have 300 LSU grazing for 10 days, you have used 3 000 stock days of grazing.

You could calculate how much dry matter that is, or the amount of megajoules of energy consumed by your animals, but there really is no need. Healthy animals eat what they can, if veld quality and quantity allows.

You can create a much more useful picture of what your veld actually produces, rather than simply repeating a historical hectares-per-LSU number, by relating stock days of grazing to hectares and to actual rainfall as follows:

Assume you have 1,000 hectares of usable grazing land and the local grazing capacity benchmark is 6 ha/LSU per year, given long-term average annual rainfall. This means that 6 ha of grazing area will, on average, sustain 1 LSU for 365 days. One hectare will thus sustain 1 LSU for 61 grazing days, or 61 stock days. Hence the stocking rate can be written 61 stock days of grazing per ha, abbreviated to 61 sdh. If the long-term average annual rainfall is 600 mm and you actually get that much rain then you can expect 61 sdh of grazing.

The estimated grazing capacity required for 167 LSU for a year is therefore:

• 167 LSU x 365 days = 60955 stock days (sd) of grazing for the herd per year

With average rainfall and good veld the farm will carry 167 LSU. If you plan to run 150 mature cattle at roughly 1 LSU each, the stocking rate is within the benchmark but the veld will be underutilised. If you plan to run 190 LSU, the farm is likely to be overstocked unless there is additional feed or rain and exceptional veld conditions, or a grazing period of less than a year.

Adjusting for Rainfall and Veld Condition

The calculated stocking rate should be treated as a planning benchmark, not a fixed instruction. It is not a law. A traditional stocking-rate benchmark might say, “10 ha per LSU per year” and that is useful information but it should not automatically be interpreted as:

“My farm can carry exactly one LSU per 10 hectares, regardless.”

Benchmarks are based on assumptions about rainfall, vegetation and veld condition but your farm is not an average farm, your rainfall is seldom average rainfall, your veld condition is not a regional average and your management is not the same as everybody else’s.

This is why Herdscape argues that a long-term benchmark should only be used as a starting point. Refine the benchmark thereafter using actual farm records of rainfall and grazing days and confirm by monitoring and observing your animal performance and your veld condition.

Stocking rate becomes a dependable management tool when you calculate it from your own records and compare what actually happens against your benchmark. You develop something more valuable than a ‘published’ theoretical stocking rate when you develop your farm’s own evidence base. Keep these records:

• rainfall
• number of LSU
• grazing days
• camps grazed
• veld condition
• residual forage
• animal performance
• changes in stock numbers.

Actual grazing capacity is strongly correlated to actual rainfall so adjust it accordingly. If you get less than average rainfall then expect proportionally less grazing capacity on the farm. Grazing capacity will increase with higher-than-average rainfall.

(See the next Chewing the Cud article “What Is the Right Stocking Rate for Your Farm?” for how your rainfall records will guide your decisions).

What Happens When Stocking Rate Is Too High?

If livestock demand exceeds what the veld can provide the consequence will be a degradation of the veld. South African research demonstrates why this cannot be treated as a theoretical issue. In one Free State study, severely overstocked farms were shown to have significantly higher animal mortality than correctly stocked farms. Livestock production suffers in both the short and the long term if the veld is overstocked.

The answer is not simply to reduce the number of animals. You may need to do so in the short term, but the better question is:

Why is the farm producing less forage than it could?

Herdscape’s approach is that carrying capacity can be improved by deliberately managing for regeneration but the actual stocking rate must remain responsive to the productive capacity of the veld at all times. The goal is not “more animals at any cost”, the goal is:

More productive livestock from a more productive veld.

This moves the discussion from simply managing animal numbers to managing the productive capacity of the veld as well. A higher stocking rate should never be treated as an objective in itself, there are just too many variables for that to be a sound decision:

• Rainfall changes.
• Veld condition changes.
• Animal requirements change.
• Markets change.

Good grazing management is an ongoing process of:

Planning → Measuring → Observing → Deciding → Acting → Adapting → Planning  …..

Formulae to Remember

Stocking rate in LSU = usable grazing hectares / grazing capacity in ha/LSU

(= the maximum number of LSU the farm can carry every day for a year).

Planned stocking rate in LSU per ha = total livestock LSU / usable grazing hectares

Planned stocking rate in ha per LSU = usable grazing hectares / total livestock LSU

Do not rely solely on regional averages, knowing the formulae is useful but understanding what the numbers mean for your own farm is considerably more useful.

Herdscape’s Regenerative Grazing and Livestock Management Course covers carrying capacity, grazing capacity, stocking rate, stock density, grazing and rainfall records and the practical decision-making framework that connects them all.

The central theme of the recent Herdscape article on why stock density is the “muscle” in veld management is that stock density is powerful, but it is not a shortcut. Its value depends on timing, duration, veld recovery, rainfall, grazing capacity and the skill of the manager. Used badly, it will damage the veld. Used well, judiciously, it will create ground cover, reduce selective grazing, improve litter distribution, support water infiltration and retention and enable plants to rebuild root reserves and above-ground biomass.

Stock density is one way you can convert animal behaviour into beneficial ecological “work”.  When animals are bunched for a short period and then moved on, their grazing, trampling, dunging, urination and herd effect changes how plants, soil organisms, litter, seed and water interact.

Predictions From Biodiversity Theory

Veld productivity is an outcome of ecosystem function, it is not simply a fixed property of rainfall or land type. The older functional redundancy models in biodiversity research asked how ecosystem function might change as biodiversity or species richness in the veld increases.

A common prediction there was that ecosystem function (hence veld productivity) rises rapidly at first, as new species add new traits, roles and forms of “ecological work”. After a point, however, the curve might begin to level off because additional species appear to perform similar functions to those already present.

That levelling-off idea became known as functional redundancy. It did not mean that the additional species are useless. It meant that, under a given set of conditions, several species may appear to contribute similar functions.

The difficulty is that those conditions are rarely fixed in real agricultural landscapes. Rainfall varies, grazing pressure shifts, recovery periods change, soils differ and drought exposes functions that may not be obvious in a short-term or controlled experiment.

The original biodiversity redundancy theory has been critiqued and refined but it is not outdated or discredited. The “redundancy hypothesis” suggested that ecosystems contain “superfluous” species that perform identical functions, meaning some species could be lost without impacting the ecosystem. Today, the theory has evolved from “some species are redundant and do not matter” to “overlapping roles are vital because they provide the backup systems that keep ecosystems alive during a crisis, a part of ecosystem resilience known as functional insurance.”

A Farm-Scale Signal is Now Emerging

What is exciting is that the pattern predicted by biodiversity–ecosystem function research now appears to be materialising on farms that have been deliberately managed for regenerative outcomes. After a decade or more of intentional, deliberate management, the farms have moved beyond the slow establishment phase and into a steeper, almost exponential phase of improvement in carrying capacity per unit of actual rainfall.

This is not simply a claim that stocking rate has been increased. The more important claim is that rainfall-use efficiency has improved. If the same amount of actual rainfall can support more grazing days while soil cover, plant recovery, veld condition and resilience are maintained or improved, then the farm ecosystem is functioning differently. More rainfall is being converted into usable biomass. More biological pathways are contributing to production. The system is capturing, cycling and retaining resources more effectively.

In that sense, farms that have been managed for regeneration (ecological and economic) are now giving practical expression to the early, rapidly rising part of the biodiversity-function curve. The Michaelis-Menten saturation model maps how the curve shifts from a complementary phase, where every species matters, to a redundant phase where functions overlap:

View the Michaelis-Menten model (click here)

Better grazing management increases the opportunity for more plant species, functional groups, root architectures, soil organisms, litter layers, and recovery dynamics to contribute to ecosystem function. The “rate” of function increases because the system is no longer being held in a simplified, selectively grazed, low-cover state.

Where Is The Levelling-Off Point?

The unanswered question is whether, and when, a redundancy “levelling off” will occur. Functional redundancy models suggest that ecosystem function will eventually approach a plateau as additional diversity adds less new function. But in grazing systems that are regenerating the veld we do not yet know where that plateau lies, whether it is fixed or whether adaptive management can keep changing the ceiling by improving soil structure, water infiltration, root depth, plant recovery and biological cycling.

This is why the current moment is so interesting. The theory predicted that more functional richness should increase ecosystem function, at least up to a point. On farms that have been managed regeneratively for long enough, that prediction appears to be showing up in practical terms as greater carrying capacity per unit of actual rainfall. It is not yet clear where they might be on the curve. The practical results may still be in the accelerating phase, not the plateau phase. The farm records, not the theory alone, will tell us more and will tell us how far the curve can rise.

Why The Rotational Grazing Debate Persists

Experimental veld (rangeland) veld studies have generally found limited evidence that rotational grazing, as a fixed ecological treatment, reliably improves vegetation or soil outcomes. In contrast, farmers report that rotational systems work well when they are used as part of adaptive management: setting goals, observing responses, changing stocking decisions and learning from experience.

Despite the real, farm-scale signals the long-running debate over rotational grazing has persisted because the word “rotational” often hides the real variables. A fixed rotation, applied mechanically, is not the same as adaptive grazing management. High stock density without short graze period and adequate recovery is not regenerative. Rest without monitoring forage supply is not enough. A grazing method cannot be evaluated properly if the management decisions that make it work are treated as “background noise”.

Scientists have often tested grazing systems as treatments. Farmers experience them as decision-making frameworks. That difference matters. A research trial may ask whether rotational grazing produces a consistent average effect across sites. A farmer asks whether changing stock density, timing, recovery and stocking decisions on this farm, in this season, with this rainfall and this veld condition, will improve the trend.

Both questions are valid, but they are not the same question.

What Can We Make Of This?

We can make several things of it.

First, the debate should move away from asking whether rotational grazing works as a generic recipe and toward asking which management variables change ecosystem function.

Second, carrying capacity should not be treated as a fixed property of land determined only by average rainfall. It is also an outcome of how effectively rainfall is turned into forage through ground cover, plant recovery, root activity, soil biology and grazing impact. Besides, average rainfall is seldom, if ever, seen on the farm, only actual rainfall.

Third, functional redundancy may be less a reason to dismiss biodiversity than a warning against shallow interpretation. Species that appear redundant in a simplified system may become functionally significant once management creates the conditions for their contribution to matter. Diversity may be most valuable not only because it adds production in normal years, but because it supplies options, recovery pathways and resilience when rainfall and grazing pressure vary.

The practical conclusion is hopeful. The apparent exponential rise in carrying capacity on long-managed regenerative farms is exciting because it suggests that research predictions are becoming visible in real veld and livestock systems.

We need long-term farm records, rainfall-normalised grazing days, veld monitoring and honest reporting of failures as well as successes. The question is no longer whether management can alter carrying capacity, the better question is how far, how reliably, and under what conditions that increase can continue before the curve levels off.

Among all the grazing management practices we can use stock density exerts a disproportionately beneficial influence on regenerative outcomes for the veld. Stock density and herd effect are central to the argument that carrying capacity is not fixed and that it can be increased, but they are tools, not automatic solutions.

Herd effect is the combined physical and behavioural impact of animals moving and grazing as a group. It might be intriguing to suggest that very large numbers of animals in wildlife herds passing through a million hectares provides a model for achieving some of its advantages but that perspective tells only a very small part of the whole story. As soon as you put up a fence everything changes. It is dangerous to suggest otherwise.

The caution is that the animal impact and herd effect that comes with high stock density must be matched to grazing capacity, with short grazing periods and adequate recovery. You need your own farm data and information to do that effectively.

(Grazing capacity is always less than carrying capacity. Simply put it is the veld’s ability to safely sustain just your livestock, not everything that lives there).

If animals remain too long in a camp, or return too soon, the overgrazing effect is harmful. The principle is not “more animals on the land”, it is more controlled animal impact for a short time, followed by enough rest for the veld to recover fully.

The important point is not just the impact, but the combination of impact plus recovery.

Stock Density Is a Tool, Not a Shortcut

Stock density refers to the number animals/animal units concentrated on a given area at one time. High stock density for a short period can create useful animal impact:

• animals graze more evenly
• they trample standing dry material onto the soil surface, breaking up old, oxidised grass
• they add dung and urine and press seed and litter into contact with the ground.

This creates soil cover that feeds soil organisms, reduces bare patches and slows rainfall runoff. Cover protects the soil when the first rain comes. After the first showers have wet the surface of healthy soil the rain that follows soaks in faster and deeper because it the soil is biologically active and structured by roots and soil life. The result is even better soil aggregation, even more biological activity and further improvement in water infiltration and retention. Carrying capacity increases.

For faster, deeper water infiltration, the benefits come mainly through these pathways:

• More litter on the soil surface: Trampled grass becomes mulch, which cushions raindrop impact and reduces erosion, slows water movement and reduces soil capping.
• Less bare ground: Covered soil is cooler, less sealed and less prone to runoff.
• Better nutrient cycling: Dung and urine feed microbes and stimulate plant growth.
• Stronger root systems after recovery: If plants are allowed to regrow fully, they put energy back into root reserves and create more channels for water.
• Improved soil structure over time: Roots, soil bacteria and fungi, dung beetles, termites and other organisms help form stable aggregates and pores in the soil.
• Uniform grazing: Dense herds reduce selective, patch grazing and encourage more uniform use of the veld.

Whether water soaks in or runs off also depends on the porosity of the top layer and how that layer interacts with rainfall intensity. Soil porosity can be broken down into two main categories, textural and structural.

• Textural porosity relates to the soil’s sand, silt, and clay proportions — properties that are inherently tied to the soil’s mineral makeup.
• Structural porosity, on the other hand, is created by the biological activity, plant roots and soil aggregation.

The First Rain Prepares the Soil

During the first rain, dry soil initially repels water and slows down absorption. Subsequent rainfall infiltrates much faster and more deeply because the soil is already wet and water-repellent barriers will have broken down.

First Rain: Initial Infiltration and Resistance

• Surface Resistance: Extremely dry soil around plants often becomes hydrophobic (water-repellent) due to dry organic coatings on soil particles.
• Slow Start: Water may initially bead up or run off the surface rather than soaking in evenly.
• Preferential Flow: Water that does break through then travels down channels (macropores) created by grass roots and insect and biological activity, rather than wetting the soil uniformly.
• Gradual Re-wetting: Over the course of the first rain, the soil slowly absorbs moisture, which begins to hydrate the dry particles and lower the surface resistance.

Between Rains: Moisture Redistribution

• Capillary Action: During the hours between storms, water moves deeper into the soil profile driven by gravity and capillary action.
• Breaking Hydrophobicity: The prolonged contact with water dissolves or breaks down the waxy, water-repellent organic compounds coating the soil.
• Balanced Moisture: The upper soil layer transitions from a bone-dry state to a hydrated state, readying the pore spaces to receive more liquid.

Second Rain: Accelerated and Uniform Infiltration

• High Infiltration Rate: Because the antecedent moisture is high and the water-repellent barrier is gone, the second rain starts soaking in immediately.
• Even Absorption: Water moves uniformly through the soil matrix instead of just sliding down root channels or forming puddles.
• Deep Root Penetration: Moisture reaches deeper root zones much faster, efficiently utilizing the secondary rainfall

Under slow, steady rainfall, most soil types will absorb at least some water. During more intense rainfall events infiltration depends on the presence of biological pores/macropores and stable aggregation. Without macropores heavy rainfall may overwhelm the soil surface, leading to runoff and erosion.

Roots, Litter and Soil Life: The Infiltration Team

The reality is that effectiveness of the first wetting event in the wet season depends greatly on the condition of the veld before the rain arrives. Where grazing and livestock management have maintained adequate ground cover, living roots, litter, soil organic matter and biological activity, the soil surface is better protected and structurally more open. Grass crowns, root systems, old root channels, dung beetles, termites, earthworms and all other soil organisms all contribute to the presence of macropores and stable aggregates.

The rain following the first shower is not falling on the same soil condition as the first rain. If the veld has been managed for regenerative outcomes, the initial wetting reduces surface resistance and activates the existing pore network. The second and subsequent rain can then infiltrate more rapidly, more uniformly, and more deeply, so instead of being lost as runoff, a larger proportion of the rainfall is retained in the root zone, where it supports plant recovery, deeper rooting, microbial activity and biomass production.

How the Veld Changes and How Nature Responds

In natural veld on healthy soil the relationship between microbial activity and biomass production (forage for livestock) is governed by a cause-and-effect cycle where one change triggers another change, which then influences the original change. It is a “feedback loop”, a continuous cycle where the results of the microbial activity feed back into the plant-soil system driven by the diversity of the plants growing in the veld. Each new cycle is bigger, stronger or more intense than the last so it is cumulative and the rate at which carrying capacity per unit of rainfall increases is very rapid. The cycle depends upon:

1. The Catalyst: High plant diversity (mixes of grasses, legumes, and forbs) provides a varied diet of root exudates (leakage of sugars, amino acids) into the soil. Plants may exude up to 40% of their photosynthetic carbon into the root zone to feed microbes.
2. The Microbial Response: This variety fosters and restores a highly diverse community of microbes (microbiome). Early stages of the restoration of the microbiome yield massive improvements in soil structure and water infiltration.
3. The Stability Phase: Once the microbiome is established it acts as a stabilising buffer. During severe climate events or grazing shifts, productivity does not continuously surge; rather, the microbiome maintains a high, resilient baseline of veld carrying capacity.

Overgrazing strips away the plant canopy and stops the flow of food from plants to microbes in the root zone. Improving carrying capacity or rehabilitating overgrazed veld is essentially an exercise in restoring the underground soil microbiome so it can build, or rebuild, the aboveground plant community.

The Link Between Grazing, Microbes and Carrying Capacity

To kickstart the process you must address both soil architecture and grazing management simultaneously.

1. Break the Soil Cap

Rainfall cannot easily penetrate capped or compacted soil, running off instead and carrying precious topsoil with it. This moisture is the minimum requirement needed to wake up the dormant soil microbes.

2. Short Graze Period

High-density, short-duration grazing ensures plants are evenly grazed. The sudden pulse of severe grazing causes plants to slough off part of their root systems underground and this dead root mass serves as an enormous organic food injection for saprophytic soil microbes. A severe graze is not harmful if it is followed by a long rest period of up to 12 months to allow the veld to recover fully.

3. Leverage the “Hoof and Dung” Effect

High-density livestock act as biological land renovators when managed properly, herd effects and their dung and urine act as highly concentrated inoculants of active nitrogen, organic carbon and soil microbes. This triggers a rapid spike in soil respiration and nutrient cycling. Use overnight kraaling or high-intensity tramping on severely degraded or bush-encroached “hard pan” areas, followed by long rest

4. Enforce Strict Rest and Recovery Periods

The ultimate failure in veld management is not the intensity of the graze, but the lack of time given for plants to recover.

Improved water infiltration and retention is both a result and a driver of veld regeneration. Better-managed veld captures more rain; captured rain grows more grass; more grass feeds more roots and soil organisms; and these, in turn, improve soil structure and future infiltration.

Your livestock, when managed to support recovery rather than continuous pressure, will become part of the process that restores soil function and forage production. The practical significance is that managing grazing and animals for regenerative outcomes does not merely decide how much grass is available to your animals today; it influences how much of the next rainfall event will enter the soil, how deeply it will be stored, and how strongly the veld will be able to recover after drought or dry spells.

Manage the complexity for better production per unit of actual rainfall. Match stocking rate to grazing capacity and apply stock density judiciously, at all times, to unlock the regenerative potential of your veld. That is not something you create or “manufacture”, but you can, intentionally, enable it to thrive.

Regeneration Is Enabled, Not Manufactured.

There is an important distinction that is often lost in discussions about regenerative agriculture: regeneration is not managed into existence; it is enabled through management. The potential for regeneration already exists, in spite of management. You do not create regenerative outcomes any more than a conductor creates music. The conductor creates the conditions for musicians to perform at their highest level. Likewise, your management creates the conditions under which the biology of the ecosystem can express its regenerative potential.

Regeneration is therefore not something you do to the land. It is something the land does in response to your effective management. Your role is to steward the factors that influence ecosystem function, allowing nature’s biological processes to express themselves fully. The better the management of those contributing factors, the greater the potential for the soil microbiome to deliver regenerative outcomes.

Management as Coaching: Reading the Veld

When “Regenerative Grazing” is used as a label it can imply that grazing management, when it results in regenerative outcomes, is a new and separate method of management, fundamentally different from the way veld and animals have been managed in the past. It is not. What is different is the quality, precision and intent of the management decisions being made. The manager is not the player who produces regeneration directly, but the coach who reads the field, understands the core principles that govern veld and animal production and makes timely adjustments that allow the veld to express its full biological potential. This requires close observation, disciplined interpretation and continual adaptation in the management of:

• carrying capacity and grazing capacity
• stocking rate and
• stock density.

Regenerative outcomes are not produced by management; they are expressed by the living ecosystem in response to the quality of the decisions you make. Good management does not force the veld to regenerate. It removes constraints, times interventions appropriately, balances animal demand with biological supply and creates the conditions in which plants, soil organisms, water cycles and grazing animals can interact productively. In this way, the manager’s decisions coax beneficial regenerative outcomes from the veld while it improves the profitability and resilience of the extensive (veld-based) livestock enterprise.

The First Principles That Govern Effectiveness

The primary responsibility of management is to understand and work within the biological limits of the land to improve it. This begins with managing carrying capacity and grazing capacity. Carrying capacity determines the long-term ability of the landscape to support livestock and wildlife, while grazing capacity reflects the forage available for livestock, only, at a particular time and under current environmental conditions. Effective management aligns stocking rate with grazing capacity, ensuring that animal demand remains in balance with the land’s ability to recover and produce.

However, successful management goes beyond simply matching stocking rates to available forage. Through the strategic use of stock density and veld rest and recovery you influence how animals interact with plants and soil. Properly managed stock density can improve plant utilisation, litter distribution, soil cover, nutrient cycling and biological activity. In doing so, it can increase the effectiveness with which rainfall is captured, infiltrated and retained within the ecosystem.

Turning Rainfall into Biological Function

Rainfall alone does not determine productivity. The crucial question is how effectively rainfall is converted into biological function. Well-managed grazing can improve water infiltration, reduce evaporation, increase soil organic matter and enhance the soil’s capacity to store moisture. As rainfall effectiveness improves, grazing capacity increases, creating a positive feedback loop between management, ecosystem function and productivity.

Herdscape: Building Better Decision-Makers

Rather than promoting ideology, Herdscape promotes disciplined thinking and better decision-making in veld-based livestock production. Its purpose is to help producers understand the hierarchy of principles that determines whether management is effective: first the biological limits and potential of the veld, then the relationship between carrying capacity, grazing capacity, stocking rate and stock density, and finally the day-to-day choices that must be adapted to season, rainfall, forage availability, animal performance and business objectives. Herdscape does not ask you to follow a fixed recipe, which generally it not helpful. It equips you to think clearly, observe accurately and act deliberately in conditions that are always changing.

Herdscape develops decision-making mastery for livestock producers and farmers in general. We help producers translate sound principles into practical management decisions that improve profitability, strengthen cash flow and regenerate the productive capacity of their land. This requires more than intuition. It requires powers of observation, reliable data collection and simple systems that convert what is seen in the veld and measured in the business into useful information. That information must then feed back into management, creating a continuous learning loop in which each season improves the quality of the next set of decisions. Herdscape is not building a movement; it is building better farmers, better managers and more resilient veld-based livestock businesses.

Carrying capacity and stocking rate are not the same thing. Grazing capacity is different to carrying capacity and stock density is not the same as stocking rate.

Carrying capacity is the total number of animals (livestock and all wildlife) an entire environment can support without degrading resources, while grazing capacity focuses strictly on the livestock that the available veld forage or vegetation can sustain, without degradation. Grazing capacity is always less than carrying capacity.

While these terms are used interchangeably they are defined with slight differences in scope.

Carrying Capacity

• Definition: The maximum number of animals (livestock and wildlife) that a specific piece of land can safely support over a year, measured in hectares per large stock unit – ha per LSU, based on average annual rainfall. It is more precisely and usefully measured in stock days, or grazing days, per ha per 100 mm of rainfall.
• One stock day is an animal rated at one LSU grazing for one day
• Scope: Carrying capacity looks at the whole ecosystem and includes total plant forage, available drinking water, shelter, space and soil health.

Grazing Capacity

• Definition: The maximum number of grazing livestock that a piece of land can safely support over a year, measured in ha per LSU. It is more usefully measured in stock days, or grazing days, per ha per 100 mm of rainfall.
• Scope: It is a narrower, production-focused measurement.

Key Differences at a Glance

• Broad vs. Specific: Carrying capacity covers all survival needs (water, space, forage), while grazing capacity looks only at the food supply for livestock from the veld or pasture.
• Application: Grazing capacity is a practical and more pertinent tool for farmers measuring stocking rates for cattle or sheep, whereas carrying capacity is a broader ecological limit for all life in that habitat.

Stocking Rate

A stocking rate is the number of animals or animal units allocated in practice to a specific area of land over a set period. It is measured as large stock units per hectare, LSU per ha, or alternatively as the area occupied by one LSU for a set period, ha per LSU per year or per month.

Stocking rate should not exceed the actual grazing capacity. If it does so consistently then overstocking or overgrazing will result. Both overstocking and underutilisation are to be avoided, the goal is to match stocking rate to grazing capacity at all times.

How to Calculate Stocking Rate

To find the stocking rate, divide the total number of animals on the farm for the period in LSU by the available land area or vice versa depending on how you plan the ratio.

• 100 LSU on 1000 ha for one year means the stocking rate has been 0.1 LSU per ha for a year or alternatively 1 LSU per 10 ha for a year.

Calculations of carrying capacity and grazing capacity require a firm understanding of the definition of the large stock unit in nutritional terms.

Large Stock Unit (LSU) and Conversion Factors

In South Africa, 1 LSU is defined as a steer or an ox (a bovine) with a weight of 450kg and a weight gain of 500g per day on grass pasture (veld) where the mean Digestible Energy (DE) concentration is 55%. (Meissner et al., 1983). This would be equivalent to approximately 9 kg of 55% digestible dry feed, or 75.0 megajoules of metabolisable energy per day, MJ ME/day.

All other livestock classes are scaled against the 1 LSU standard. For example:

• Large breed mature cow, 450 kg average weight, 1.00 LSU equivalent value
• Small breed mature cow, 320 kg average weight, 0.71 LSU equivalent value
• Heifer/ weaner calf, 235 kg average weight, 0.52 LSU equivalent value
• Mature sheep, 50 kg average weight, 0.145 LSU equivalent value

Grootfontein College of Agriculture estimates 6.9 sheep per LSU for 50 kg sheep (i.e. approximately 10 sheep to 1 LSU for 45 kg sheep).

Livestock unit ratings are relative measures, they can vary depending on the physiological state of the animal (pregnant, lactation, weight gain). You should refer to scientific literature, metabolic weight calculators or livestock rating tables to assess appropriate ratings for your own types and classes of livestock on your own farm. However, once a livestock unit rating is standardised for a particular farm or grazing system and a particular class/type of animal it should not arbitrarily be changed. It should provide a consistent and stable framework for grazing management thereafter.

While there may be occasions when adjustments are needed due to changes in characteristics of livestock type or class, or changes in land conditions and management practices, these adjustments should be based on careful observation and data analysis rather than ad hoc decisions.

The reality is that a healthy mature cow of around 450 kg live mass can eat 2% to 3% of its own bodyweight in a day, so between 9 kg to 13.5 kg of dry matter per day. A cow exhibiting good gut fill in the late afternoon will have grazed to the upper limit. To check gut or rumen fill on a cow, look at the “hunger groove” in the left flank in the triangular hollow area just behind the last rib, below the spine, and in front of the hip bone.

Consistency of the dung is a useful indicator of the effectiveness of rumen function in digesting the available forage. Digestibility of the feed in the veld varies with protein content (C:N ratio) and the amount of lignin in the feed. Large, soft, slightly heaped dung indicates quality feed. Hard, dry dung indicates the need for a strategic supplement.

Stock Density

• Definition: Stock density is the number of animals, or animal units, present on a specific area of land at a particular moment. It describes the immediate relationship between livestock numbers and the area being grazed. It is measured in LSU per ha or animals per ha.

The stock density at a stocking rate of 100 LSU in a five-hectare camp is 20 LSU per ha.

The grazing offtake in any graze period is measured in stock days per hectare, SDH, the stocking rate in LSU/ha multiplied by the graze period in days.

The general rule for the application of stock density is to apply the maximum stock density to achieve the desired result, or desired herd effect, but for minimum time. It is common for graze period to be less than a day when stock density is applied. The grazing offtake harvested in a graze period of 12 hours would be 10 SDH (20 LSU/ha x 0.5 days).

In practice, all of these measures are most useful when they are understood as management tools rather than fixed formulas. Carrying capacity, grazing capacity, stocking rate and stock density each describe a different part of the grazing picture, and using them correctly helps you make better decisions. The aim is not to arrive at a single permanent number, but to keep adjusting the stocking rate and grazing plan in response to veld condition, animal performance, grazing offtake and actual rainfall. Good records, regular observation and judicious interpretation of the figures are what turn these concepts into sound grazing management.