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' • • E;{HIBIT I/J(Cont `d) <br />C2 12-60"--Light brownish gray (lOYR 6/2) silt loam, massive, hard <br />dry, friable moist; strongly calcareous; moderately alkaline; <br />seams and nodules cr gypsum mostly in the lower 25 inches. <br />Several layers about 1 inch thick of light brownish gray (lOYR <br />6/2) silty clay in lower 30 inches. <br />The 9 horizon is dominantly a silty clay loam. Hue of the r1 <br />horizon ranges from lOYR to 2.SY but is dominantly lOYP.. <br />' Billings silty clay loam (Es).---This level and nearly level soil <br />occurs on flecd plains and low terraces. It has a profile similar to <br />the one described as typical for its series. Included in mapping ac•e <br />10 percent cf Youngston and Persayo soils. <br />Surface runoff is moderate and erosion hazard is moderate. Deep <br />gullies are ccavon throug'.-~out most mapped areas of this soil. Gullies <br />limit the beneficial effect of overflow and restrict use by man and <br />animals. <br />' The soil is used mostly as range. Vegetative cover includes greas~- <br />' wood, rabbitbrush, galleta grass, western irheatgrass, and annual weeds. <br />Small areas in the Y.onnah Creek and nhiteaater Creek areas are irrigated <br />' corn and alfalfa, and irrigated pasture. <br />Capability unit irrigated IIs. <br />t Capability unit (non-irriagad) VIIs2 Salt flats range site. <br />EL9CKSTC:1 SEP,IES~3 $ - ~,~ <br />'ihe Blackston series consists of deep, well drained soils. They <br />formed in alluvius weathered from basalt on high terraces. Slopes <br />are 3 to 25 percent, Elevation is li&CO to 5500 feet. ;datural <br />vegetation is dominar.+.ly saltbushes, shad scale, rabbitbrush, galleta, <br />31 <br />