ENVS 3080 Study Guide - Final Guide: Chisel, Nitrogen Fixation, Erodability
1 Mar 2017
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Week 5 - preventive and corrective measures biological, tillage and cropping. Erosion function of the erosive power applied by nature relative to the ability of the soil to resist that power. The annual distribution of rainfall, the intensity of the rain etc are a function of climate and weather patterns that are essentially beyond human intervention. The basic ability of the soil to resist nature is a function of inherent soil characteristics like texture which are very difficult to change. All are in direct contact with the soil surface and thus serve as buffers or thin. Standing vegetation (eg. cover crops) reduces soil erosion through the protective effect of the canopy cover which intercepts raindrops above the soil surface and by the mulching effect of residues produced by the growing vegetation. Measure of the fraction of the soil surface covered by vegetation. Different strata of plant leaves and branches make up the multi-story architecture of plant canopy.
