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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />The Rio Grande Canal serves land with soils of the <br />Gunbarrel-Mosca-San Lui s, the Norte-Quamon-San Arcaci 0, and the <br />Sunul-Platoro-Gray Point soils associations. These soils range in <br />depth from 10 to 60 inches in nearly level or very gently-sloping <br />areas. The soils have developed on broad alluvial fans, terraces, and <br />floodplains. The compositions include sandy loam, gravelly sandy <br />loam, and gravelly sand. These groups are designated as SM-SP and <br />GM-GP under the Unified Soil Classification System. <br /> <br />The Monte Vista Canal serves land of the Zinzer-San Aracio-Villa <br />Grove and the Hooper-Arena-San Luis soil associations. These groups <br />consist of sandy loam, sand, and sand to gravel (St1-SP) ranging in <br />depth from 10 to 60 inches. <br /> <br />Most soil s served by both canal s have a natural surface 1 ayer of <br />gravelly-sandy loam or loamy sand (SM) with low organic content and <br />weak structure that is susceptible to wind erosion if not managed <br />properly. Soil erosion due to surface water flow is generally low <br />due to low slopes and low precipitation. <br /> <br />For agricultural purposes, soils are further classed by the SCS <br />methodology according to suitabil ity for a particul ar use. The land <br />capability classification is a system consisting of three levels used <br />to identify the suitability of a particular soil for growing most <br />types of field crops. The broadest levels are designated by Roman <br />numerals I through VIII, with progressively higher numbers indicating <br /> <br />III - 2 <br />