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<br />rotation of crops often allows for the planting of both shallow and deep <br />rooted plants; this pattern improves the physical condition and the <br />internal drainage of both the surface soil and the subsoil. <br /> <br />Cover Crops <br /> <br />Grasses and other close-growing crops gives more soil protection <br />than row crops such as corn and grain sorghum. Crops that leave large <br />quantities of residue after harvest offer more soil protection than crops <br />with small quantities of residue. <br /> <br />Cover crops are grown when there would otherwise be no growing <br />plants and/or residues to protect the soil from erosion. An example is <br />winter rye seeded immediately after a corn crop is harvested for silage. <br />The growing rye protects the soil during the fall, winter and early <br />spring when the field would otherwise be bare and subject to erosion. <br />Many cover crops are left on the soil to serve as protective mulch, or <br />are plowed under for soil improvement. <br /> <br />Cover crops may be special <br />protection" or they may be crops <br />planted in a different season. <br />seeded in the fall, following a <br />the winter and the tops protect <br /> <br />crops planted to provide soil cover and <br />typically found in the rotation but <br />An example is spring oats, which are <br />row crop. The growing oats freeze in <br />the so11. <br /> <br />Pasture Management <br /> <br />Land use for grazing is characterized by a diversity of climate, <br />topography, soils, vegetative type, and vegetative condition. This <br />diversity, coupled with varying intensities of livestock use, creates <br />the potential for varying degrees of water erosion. <br /> <br />Prevention and control of erosion on irrigated pasture land are <br />accomplished through management practices that control the intensity of <br />livestock use, and/or increase the density and productivity of the <br />vegetation. Overgrazing results in soil structural changes because of <br />soil compaction and reduction of soil permeability. It also changes <br />the density, vigor, and species composition of vegetation and reduces <br />the protective soil cover afforded by vegetation. <br /> <br />r ,p ..... <br />nitnj~rJ" <br />\.) ,.,..... '" <br /> <br />B-S <br />