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The USDA initiated the Conservation Effects Assessment Project (CEAP) to quantify the environmental benefits of conservation practices at regional and national scales. For this assessment, a sampling and modeling approach is used.
We use a simple ecological sustainability simulator (SESS) Diaz-Solis, H., Kothmann, M.M., Hamilton, W.T., Grant, W.E., 2003.
Site degradation occurs mainly through deterioration of the soil's capacity to capture and store water, as well as the loss of organic matter or the accumulation of salts or other toxic substances in the soil.