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i <br /> z <br /> ,i <br /> 1, <br /> .ronfill9 Co <br /> .1:i/78 <br /> MY <br /> V7A--Quamon gravelly sandy loam_,__0 to_3_percent slopes <br /> i <br /> This is a' deep, sonewhat ercccsively drained soil on lbw terracas <br /> adjacent to streamsl,at elevations of ",600 to 3,60o feet. It fDrmed in <br /> alluvium derived mainly from iEneous rocks. <br /> I <br /> i <br /> Included in this unit are :small areas of similar soils with ro6l: <br /> fragments mainly 3 to 10 inches in diameter, Shawa soils and LaJara. <br /> J{ <br /> " soils, all on 0 to 3 percent slopes. <br /> Typically the surface layer is dark grayish brown gravelly, sandy <br /> loam about 8 inches thick. The underlying material is dark brown very <br /> gravelly loamy sand and sand that extends to 60 inches. <br /> Permeability is rapid. Effective rooting depth is 60 inches or more. <br /> Ii Available water capacity is low. Surface runoff is slow and .efosiehi <br /> hazard is slight. There is a seasonal tiratertable within 3.5 to 4 .feet j <br /> I � <br /> iduring the spring and summer ranoff period in most years. <br /> i <br /> This soil is used for native range and for irrigated pasture and hay- <br /> land. Potential vegetation on this soil is drominated by blue grams, <br /> Indian ricegrass and sand dropseed. Rabbi brush and squirreltail are <br /> prominent, but widely spaced. .When the range deteriorates, the proportion <br /> of more desirable grasses decreases and the proportion of rabbtbrush <br /> and blue grams increases. Undesirable weeds and annual plants invade <br /> I <br /> and become more abundant as range condition becomes poorer. <br /> i <br /> J <br />