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• to mildly alkaline A and upper Bt horizons which have a moderately high to very high <br /> organic matter content and are generally slightly effervescent. The second lift topsoil <br /> (1.3 feet) will generally include the lower Bt and Bk horizons. <br /> D70B - Barx Sandy Loam-Barx Scalped-Barx Buried Complex. This single isolated map unit is <br /> located on the nearly level to gently sloping upland colluvial terrace in the southeast <br /> portion of the study area. The Barx sandy loam soil profile is deep to very deep and well <br /> developed with a dark colored surface horizon and subsoil clay accumulation. Land <br /> leveling activities were utilized in 1976 within this map unit to improve overland flood <br /> irrigation efficiency and enlarge the cropland area. The upper soil horizons from <br /> topographically high landscapes (ridges) were removed and utilized to fill nearby swales <br /> and drainages. Other areas of Barx sandy loam soil remained undisturbed by the land <br /> leveling activities. Accordingly, these three soils, Barx sandy loam, Barx-scalped, and <br /> Barx-buried are intimately intermingled throughout this map unit. <br /> The Barx sandy loam soil is an excellent source of loamy topsoil. The soil generally has <br /> highly suitable chemical and physical properties throughout the entire profile. However, <br /> topsoil salvage is restricted within the lower subsoil of some profiles due to excessive <br /> calcium carbonate levels and high clay contents. The mean salvage depth for Barx sandy <br /> loam, based upon 10 profiles, is 63 inches. Barx-scalped profiles typically have mildly <br /> to moderately alkaline, moderately saline horizons with a low organic matter content, high <br /> calcium carbonate level, and massive structure throughout the upper two to three feet of <br /> the profile. Prior to disturbance, these subsoil horizons would have been covered with <br /> about 1.5 to 2.0 feet of highly suitable topsoil. The existing surface horizon of <br /> Barx-scalped soil has marginally suitable subsoil qualities. Minimal first lift topsoil <br /> is recommended to be salvaged from this soil type. The mean salvage depth for <br /> Barx-scalped, based upon 2 profiles, is 42 inches. Weathered sandstone bedrock is <br /> typically encountered at less than 60 inches in this profile. Barx-buried profiles are <br /> typically quite variable with chemical and physical properties being stratified by depth. <br /> Barx-buried profiles generally have mildly to moderately alkaline, moderately saline <br /> horizons with a low organic matter level, high calcium carbonate content, and massive <br /> structure throughout the upper two to three feet of the profile. Former surface horizons <br /> with low calcium carbonate levels and high organic matter contents are often found buried <br /> deep within the subsoil or substratum of these profiles. As with Barx-scalped, the upper <br /> horizons of some profiles would only be classified suitable as second lift topsoil. The <br /> mean salvage depth for Barx-scalped, based upon 3 profiles, is 57 inches. <br /> 21-22 Revised 08/19/88 <br />