In nature, there is no waste, because the output of every process constitutes the inputs for other processes. Clark notes that properly managed grass-based livestock production will mimic nature in at least five key ways, which are described here in very simplified form. Ground Cover . Perennial pasture provides year-round ground cover protecting bare soil from crusting, pore clogging, and the erosive effects of rainfall. Soil Conservation .
Perennial pastures grow and contribute to soil organic matter from early spring to late fall.
Moreover, uncultivated land promotes the accumulation of organic matter and nutrients frequently lost during conventional cultivation. This enhances a vigorous soil biotic community, and strong plant growth. In turn, that enhances water infiltration and reduces runoff, thereby reducing soil erosion and off-site contamination. Nutrient Cycling . Perennial sods reduce the risk of off-site pollution through efficient nutrient cycling.