Holistic Land Management
Sustainable farming practises done properly will increase the fertility of the soil.
On the rest of the land that is not farmed animals perform the dual function of clearing the land for new growth and, by defecating, urinating and trampling provide nourishment for the soil. These must be substantial groups of animals proportionate to covering the land with significant amounts of animal litter. While overgrazing is hazardous to the environment, timed and planned grazing is the only way to increase soil fertility ensuring nutrient rich plant growth. Just as putting manure on the ground is good for the land so is putting herds of animals. If animals are not part of the equation grass is left to decay biologically on its own and this tends to lead to more oxidation promoting more woody vegetation with bare patches of ground. Where ground is bared extremes of temperature cause microorganisms and other organisms to die off. Organic plant growth lessens the extremes of temperature on the ground guaranteing sufficient humidity for microorganisms to live in the soil. It is these microorganisms that favour plant growth. The presence of animals leads to more and more growth, creating a greater biomass. The absence of animals leads to more arid conditions, which will eventually lead to desertification. Arguably mixed woodland, i.e. a mixture of trees and significant grassland is an ideal biomass to not only fix water and carbon but support large numbers of browsers and grazers.