Regenerative grazing
What is Regenerative Grazing?
When livestock graze in the same area at low densities for extended periods, the most delicious and nutritious fresh regrowth of the most desirable grasses is repeatedly eaten. This constant pressure exhausts the plants and weakens the ecosystem.
Without planned grazing, savanna grasses never get the chance to fully regenerate, leading to exhausted plants, reduced forage production, declining biodiversity and ultimately to erosion and degraded soils. Regenerative grazing restores balance by in effect mimicking the natural movements of the wild herds with which the grasslands evolved. This allows plants time to recover and ecosystems to thrive.
Livestock must be concentrated
How it Works
In regenerative grazing, livestock from across the landscape are brought together and concentrated in a small area for a short period—ranging from a few hours to a few days. This mimics natural wild herd movements and prevents overgrazing. Once the area has been grazed, it is left to rest and recover, often for several months or even over a year in very arid environments, allowing grasses and other plants to fully regenerate.
This planned rotation helps restore soil health, improves forage production and quality, and supports biodiversity—creating a more resilient and productive ecosystem for both people and wildlife.
Understanding What We’re Regenerating
One of the most visible signs of a degraded savanna is bare soil—land left uncovered and unprotected by vegetation. While a savanna may appear green from a distance, a closer look often reveals significant patches of bare ground. This has serious consequences for the health of the ecosystem.
Bare soil is vulnerable to the elements: rain compacts it, sun bakes it, and over time, a hard crust forms on the surface. These crusted areas are more prone to erosion and sit slightly lower than surrounding vegetated soil. Although water may collect in these spots, it struggles to infiltrate the ground and instead runs off—especially on sloped terrain—carrying more soil with it and contributing to downstream flooding.
Regenerating these landscapes means restoring vegetation cover, improving water infiltration, and rebuilding soil health—key steps toward a more resilient and productive savanna.
Patches of bare soil
Soil protected by living and dead plants
Overgrazed short grasses and undergrazed longer ones
Maximising Rainfall Effectiveness
In arid and semi-arid regions like the Greater Mara, rainfall is often intense but short-lived. When soil is bare and compacted, water struggles to infiltrate and quickly evaporates—sometimes within hours of a storm. This leads to ineffective rainfall that fails to nourish plants.
To regenerate the savanna, it’s essential to keep the soil covered—ideally with living vegetation but decaying plant matter will also help. Covered soil stays cooler, absorbs more water, and supports root systems and microorganisms that improve its structure. This creates a virtuous cycle: better water infiltration and retention leads to healthier plant growth, which in turn provides more cover and further enhances the soil’s ability to absorb and hold water.
Rethinking Grazing and Savanna Health
In degraded savannas—where bare soil is prevalent and grasses struggle to nourish wild and domestic herbivores—the common conclusion is that there are simply too many animals. After all, if grasses keeps disappearing, aren’t excessive herbivore numbers the obvious culprits? This assumption often leads to drastic measures like reducing herd sizes or culling wildlife. Unfortunately, such decisions are based on a misunderstanding of ecological processes and frequently accelerate the very degradation they aim to prevent.
So, what is really happening?
It’s crucial to recognise that herbivores—both wild and domestic—don’t graze randomly. From a young age, they develop remarkable expertise in selecting plants. They may not know botanical names, but they instinctively choose what’s nutritious and avoid what’s harmful. Every bite is a decision shaped by experience.
Let’s explore how these choices can unintentionally harm the savanna:
Imagine it’s the rainy season. Grasses are thriving, but due to concerns about degradation, the number of grazing cows has been significantly reduced. In one area, two identical perennial grasses—let’s call them Plant A and Plant B—grow side by side. A cow passes by and bites Plant A but doesn’t touch Plant B, simply because she’s following the herd.
Plant A now needs to draw on its root reserves to regrow, while Plant B continues growing undisturbed. A week later, another cow comes by. Ideally, she’d graze Plant B, giving Plant A time to recover. But she chooses Plant A again—its regrowth is fresher, more succulent, and more nutritious.
This pattern repeats. Plant A is grazed repeatedly before it can replenish its energy, while Plant B is consistently ignored. Over time, Plant A becomes exhausted. Eventually, perhaps during a drought, it dies—leaving behind bare soil.
This scenario illustrates how selective grazing, allowed by reduced animal densities, can lead to overgrazing of preferred plants and contribute to ecosystem decline. Understanding these dynamics is essential for developing grazing strategies that support both animal health and savanna resilience.
The Hidden Cost of Under- and Overgrazing
What happens to Plant B, the one that was spared? Surprisingly, it suffers too. As its leaves age, they become less palatable to grazers and are left untouched. Eventually, the plant flowers, sets seed, and dries out. During the dry season, this dead material doesn’t decompose due to lack of moisture—it simply accumulates. When the rains return, new growth must push through this dry layer to reach sunlight, making it harder for grazers to access. The result? The plant is avoided again, becoming increasingly unhealthy as dead material builds up year after year.
Now, imagine if Plant A and Plant B were different species, with Plant A being the preferred one. Over time, Plant A would be repeatedly grazed and eventually disappear, while Plant B—less desirable—would dominate the landscape. This selective pressure alters species composition, reducing biodiversity and resilience.
Even with fewer herbivores, this imbalance persists. Preferred plants are still selected and overgrazed, while others are undergrazed. If this pattern continues, it leads to savanna degradation: more bare soil, reduced biodiversity, and poorer water infiltration—hallmarks of desertification.
The Real Issue: Time, Not Numbers
So, what’s the real lesson here? It’s not the number of cows that causes over- and undergrazing—it’s how long they stay in one place.
Let’s compare two scenarios:
- One cow on one hectare for 365 days
This cow will repeatedly graze the same plants she prefers, ignoring both older ones and less desirable species. Even with just one cow, over- and undergrazing occur. - 365 cows on one hectare for one day, followed by 364 days of rest
The grazing pressure is the same (365 cow-days), but the impact is radically different. In one day, cows eat or trample all vegetation, including older growth, and the land will no doubt look devastated. But the plants roots are unaffected, the trampling has broken soil crusts and dung and urine have been evenly spread. After this extreme (only for the purpose of this exemple) but brief impact, the land regenerates when the rains come—resulting in a healthier, more vibrant savanna.
Regenerative Grazing: A Natural Partnership
This approach—short, intense grazing followed by adequate rest periods—mirrors the behaviour of wild herbivores. In nature, many herbivores stay grouped for protection and move on quickly once resources are depleted or waste accumulates. Savannas evolved under this dynamic, and regenerative grazing mimics it.
Importantly, removing all livestock (as in some national parks) may not benefit the ecosystem. Grazers stimulate grasslands and remove or trample old growth. This relationship, refined over millions of years, is essential to savanna health.
These elephants are not here by chance: this healthy savanna provides them with food that they like
Working with Nature, Not Against It
Regenerative grazing seeks to replicate the natural symbiosis between herbivores and savannas—a relationship shaped over millions of years. While every landscape is unique and requires tailored management, the core principle remains the same: stop continuous grazing, concentrate livestock to intensify grazing events, and move them frequently.
During the rainy season, when grasses are actively growing and depending on the densities achieved, animals should be moved every few hours to a maximum of about four days. This prevents repeated grazing of the same plants before they’ve had time to recover. Once grazed, areas should be left undisturbed until the vegetation has sufficiently recovered.
In the dry season, grasses are dormant and less vulnerable to overgrazing. However, frequent movement is still beneficial. By rotating livestock through fresh areas, animals are encouraged to eat more—even when forage quality is lower—while also helping to distribute manure and break down older plant material.
This approach not only protects plant health but also enhances soil fertility, water retention, and biodiversity. Regenerative grazing is about timing, not numbers—and when done right, it transforms grazing from a pressure into a powerful tool for ecosystem restoration.
© MGM 2022
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