Grazing animals play a role in soil fertility from "summary" of Soil, Grass, and Cancer by André Voisin
The presence of grazing animals on a piece of land can bring about profound changes that benefit soil fertility. As these animals move across the pasture, they not only consume grass but also trample and disturb the soil. This trampling action breaks up compacted soil, allowing for better water infiltration and root growth. Furthermore, the manure left behind by grazing animals serves as a natural fertilizer, replenishing essential nutrients in the soil. The process of grazing also stimulates plant growth by encouraging the development of new shoots. When animals graze on grass, it triggers a response in the plant to regrow more vigorously. This constant cycle of grazing and regrowth helps to maintain a healthy and diverse plant community, which in turn contributes to improved soil structure and fertility. In addition to physical benefits, grazing animals play a crucial role in the nutrient cycle of the ecosystem. Through their consumption of plants and subsequent excretion of waste, they help to recycle nutrients back into the soil. This recycling process ensures that essential elements like nitrogen and phosphorus are made available for plant uptake, supporting the overall health of the pasture ecosystem. Moreover, the presence of grazing animals can also help to control weed populations. By selectively consuming certain plant species, animals can prevent the dominance of undesirable weeds and encourage the growth of more desirable grasses. This natural form of weed management reduces the need for chemical herbicides and promotes a more balanced and resilient ecosystem.- The symbiotic relationship between grazing animals and the land has far-reaching implications for soil fertility. By mimicking the natural grazing patterns of wild herbivores, farmers and land managers can harness the power of these animals to improve soil health, promote plant growth, and sustainably manage pastures. Embracing this holistic approach to agriculture can lead to healthier soils, more productive pastures, and ultimately, a more sustainable food system.
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