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I 00236' expected. Sudan grass may be used for summer pasture to relieve the load on native grass. Fair yields of forage sorghums can be produced for silage and dry-lot feeding. Milo is the best adapted grain sorghum for grain feed but average yields are low,' probably not more than 7 or 8 bushels per acre on these hard lands, and it should be strip cropped with more closely spaced forage sorghums to control erosion. Wheat or rye may be drilled for winter pasture if moistlU'e conditions are favorable for carly fall seeding. Limited acreages of groups 5, deep sandy soils, and 55, medium-depth sandy soils, may be utilized for feed- crop production in connection with a range program. Fair yields of grain and forage sorghums can be expected if erosion-control practices are rigidly applied. Wheat is not adapted, but rye is sometimes used for winter pnsture. Sufficient stubble must be left to help protect the soil during the winter and spring months nnd to help main- tain the org'nnic content of the soil. A minimum st,ubble height of 10 inches is recommended. It must be kept in mind that in the drier years the stubble may not be dense enough on these soils, in contrast to those in class III, to afford adequate protection, llJld emergency tillage may be necessary. Such tillage may be deep chiseling or deep listing to roughen up the surface and break wind currents and to bring the more erosion-resistant cloddy sub- soil to the surface. Whenever possible, tillage should be done when the soil is moist, Grain and forage sorghums should be planted in June, preferably in strips at right angles to the prevail- ing wind. Opportunities for tree planting in the county are limited largely to wind- breaks near farmsteads. Their prin- cipal value lies in protecting farm build- ings, furnishing shade, and improving the appearance of the farmstead. These windbreaks should be used only where there is little danger of dust accumula- tions from adjacent fields, and they should be so planned as to receive adequate water and care for their estnblishment. Class III land is better adnpted to trees than class IV land. Col-227 Fig~lre 5.-Listing class IV land on thc'contour for water conservation. The development of power machinery encouraged farmers to plow up too much land of this Idnd. We~tern and Southeastern Baca County Soil Conservation Districts, Colorado 4682000--44----3 15