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Custom Soil Resource Report <br />Coprogenous earth (sedimentary peat) <br />A type of limnic layer composed predominantly of fecal material derived from <br />aquatic animals. <br />Corrosion (geomorphology) <br />A process of erosion whereby rocks and soil are removed or worn away by natural <br />chemical processes, especially by the solvent action of running water, but also by <br />other reactions, such as hydrolysis, hydration, carbonation, and oxidation. <br />Corrosion (soil survey interpretations) <br />Soil -induced electrochemical or chemical action that dissolves or weakens <br />concrete or uncoated steel. <br />Cover crop <br />A close -growing crop grown primarily to improve and protect the soil between <br />periods of regular crop production, or a crop grown between trees and vines in <br />orchards and vineyards. <br />Crop residue management <br />Returning crop residue to the soil, which helps to maintain soil structure, organic <br />matter content, and fertility and helps to control erosion. <br />Cropping system <br />Growing crops according to a planned system of rotation and management <br />practices. <br />Cross -slope farming <br />Deliberately conducting farming operations on sloping farmland in such a way that <br />tillage is across the general slope. <br />Crown <br />The upper part of a tree or shrub, including the living branches and their foliage. <br />Cryoturbate <br />A mass of soil or other unconsolidated earthy material moved or disturbed by frost <br />action. It is typically coarser than the underlying material. <br />Cuesta <br />An asymmetric ridge capped by resistant rock layers of slight or moderate dip <br />(commonly less than 15 percent slopes); a type of homocline produced by <br />differential erosion of interbedded resistant and weak rocks. A cuesta has a long, <br />gentle slope on one side (dip slope) that roughly parallels the inclined beds; on <br />the other side, it has a relatively short and steep or clifflike slope (scarp) that cuts <br />through the tilted rocks. <br />Culmination of the mean annual increment (CMAI) <br />The average annual increase per acre in the volume of a stand. Computed by <br />dividing the total volume of the stand by its age. As the stand increases in age, <br />W <br />