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Custom Soil Resource Report <br />Complex slope <br />Irregular or variable slope. Planning or establishing terraces, diversions, and other <br />water -control structures on a complex slope is difficult. <br />Complex, soil <br />A map unit of two or more kinds of soil or miscellaneous areas in such an intricate <br />pattern or so small in area that it is not practical to map them separately at the <br />selected scale of mapping. The pattern and proportion of the soils or <br />miscellaneous areas are somewhat similar in all areas. <br />Concretions <br />See Redoximorphic features. <br />Conglomerate <br />A coarse grained, clastic sedimentary rock composed of rounded or subangular <br />rock fragments more than 2 millimeters in diameter. It commonly has a matrix of <br />sand and finer textured material. Conglomerate is the consolidated equivalent of <br />gravel. <br />Conservation cropping system <br />Growing crops in combination with needed cultural and management practices. <br />In a good conservation cropping system, the soil -improving crops and practices <br />more than offset the effects of the soil -depleting crops and practices. Cropping <br />systems are needed on all tilled soils. Soil -improving practices in a conservation <br />cropping system include the use of rotations that contain grasses and legumes <br />and the return of crop residue to the soil. Other practices include the use of green <br />manure crops of grasses and legumes, proper tillage, adequate fertilization, and <br />weed and pest control. <br />Conservation tillage <br />A tillage system that does not invert the soil and that leaves a protective amount <br />of crop residue on the surface throughout the year. <br />Consistence, soil <br />Refers to the degree of cohesion and adhesion of soil material and its resistance <br />to deformation when ruptured. Consistence includes resistance of soil material to <br />rupture and to penetration; plasticity, toughness, and stickiness of puddled soil <br />material; and the manner in which the soil material behaves when subject to <br />compression. Terms describing consistence are defined in the "Soil Survey <br />Manual." <br />Contour striperopping <br />Growing crops in strips that follow the contour. Strips of grass or close -growing <br />crops are alternated with strips of clean -tilled crops or summer fallow. <br />Control section <br />The part of the soil on which classification is based. The thickness varies among <br />different kinds of soil, but for many it is that part of the soil profile between depths <br />of 10 inches and 40 or 80 inches. <br />25 <br />