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~_ <br />" li4 Loamy Plains MLRA 49 6 70 <br />r-.. c. If ecological regression is cattle induced, grasses such as~'" <br />western wheatgrass, sideoats grama,,New Mexico fea[hergraes, <br />needleandthread and Indian ricegrass will disappear from the <br />'J plant community. Galleta, blue grams will increase. If <br />regression is sheep induced heath aster, scarler globemallow,. <br />fourwing salt bush, fringed sagebrush, winterfat, green plume <br />rabbitbrush would be reduced. With further deterioration of <br />this site, galleta and blue grams will disappear and will be <br />replaced by ring muhly, sand dropseed and red three-awn. These <br />grasses with continued destructive grazing practices will be <br />invaded with little barley, tumblegrass cheatgrass and hairy <br />ttidens. The brush species that increase as range conditions <br />deteriorate are broom snakeweeed, fringed sagebrush, <br />alkingstick cholla, plains pricklypear, curlycup gumweed. <br />' Matrimonyvine is an introduced species that occurs in swalea G~ <br />where extra water is available from runoff of adjacent terrain. ~~ <br />d. Vegetation densityi/ is approximately 20-25 percent. <br />4. Annual Production <br />If the range is in excellent condition, the approximate total annual <br />production (air dry) ranges are: <br />Favorable Years 1600 lb/ac 1814 kg/ha <br />Normal Years 1200 lb/ac 1360 kg/ha <br />Unfavorable Years 600 lb/ac 680 kg/ha <br />Of this production 0 to 5 percent will likely be unpalatable to <br />livestock. <br />5. Soils <br />a. The soils of this site are deep, well drained and occur on <br />uplands. The Baca soils are formed in loess derived dominantly <br />from sedimentary rock. The Capulin soils are on and near basalt <br />capped mesas. The surface soils are silt Ioams and loans, <br />respectively. The Baca subsoils and substratum is silty clay <br />loam. The Capulin subsoil is a clay loam and the substratum Ss <br />a gravelly loam. These soils are mildly alkaline to moderately <br />alkaline and calcareous below 12 inches (30 cm) depth. <br />Torreon soils are formed over basalt and similar to Capulin <br />soils except with more clayey subsoils. <br />Permeability is moderate to moderately slow with a high <br />available water capacity. Runoff is slow and the hazard of <br />water erosion is high to very high on the Baca soils when the <br />vegetation is depleted. The runoff on the Capulin is medium <br />with moderate water erosion hazard. <br />Both these soils are better than 60 inches (1.5 m) deep. <br />1/ Vegetation density = basal area. This is the area of ground surface <br />covered by the stem or stems. Usually, this is measured 1 inch (2.54 cm) <br />above the soil in contrast to the full spread of perennial foliage. <br /> <br />