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2.3 Classification <br />The family and subgroup of each major soil series are listed on <br />Table L.3-l. Most of-the soils of the study area are Mollisols and <br />nave dark surface epipedons. Subgroups in the Mollisols are <br />Haploborolls, Cryoborolls and Paleborolis. Textural families are <br />fine-loamy, fine and loamy-skeletal. Tne soils without profile <br />aevelopment are Entisols. Subgroups ih the Entisols are Cryorthents <br />and Torriorthents. Textural families are fine-loamy, fine , <br />coarse-loamy and loamy-skeletal. <br />2.4 Prime Farmland Determination <br />There are no prime farmlands in the study <br />farmland determination was made by Tom Priest, <br />Scientist, USDA-SCS. The agricultural soils in <br />in the cryic temperature regime so they do not <br />criteria. A letter of negative prime farmland <br />appendix U. <br />2.5 Land Use <br /> <br />area. A negative prime <br />Colorado State Soil <br />the valley bottoms are <br />meet the prime farmland <br />determination is in <br />Most of the study area is used for cattle and sheep range. The <br />uplands are used exclusively for that use; the valley bottoms are used <br />for cattle ranching, which includes pasture and hay production. There <br />are residences in the study area on Wilson, Good Spring, and West Fork• <br />Creeks. <br />Table 2.5-I lists the SCS land capability classes and subclasses <br />for the map units of the study area. The classes and subclasses are <br />defined in the glossary. Most of the upland soils are in classes VII <br />and VIII and are unsuitable for cultivation but are suitable for <br />grazing, woodland and w ildlife habitat. The main limitation is erosion <br />(e). The bottomland soils are also considered unsuitable for <br />cultivation by the SCS, although some soils are presently used for <br />hay. <br />The potential production of rangeland or forest understory <br />vegetation is also given on table 2.5-1 for each soil series. The <br />values are in pounds per acre ary weight for favorable, normal, and <br />unfavorable years. No production data was available for the bottomland <br />soils. The soils are cryic and not considered suitable, by the SCS, <br />for alfalfa hay, and are in subclass Vle which is considered too <br />erosive for grass hay. <br />• <br />26 <br />