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4-69 <br />• Typically, the surface layer of the Alluvial land soil is a <br />light brownish gray, loose, fine sandy loam about 2 inches <br />thick. The substratum is stratified pale brown, single grained, <br />very fine sand and medium sand about 48 inches thick. <br />Permeability of the Alluvial land soil is moderately rapid. <br />Available water capacity is moderate to moderately low. Eff- <br />ective rooting depth is 48 inches. Runoff is high and the erosion <br />hazard for water is severe. Wind erosion hazard is high. <br />The unit is mainly used for wildlife habitat. <br />The present plant community includes cottonwood, big sage, <br />rabbitbrush, burdock, gumweed, and cheat grass. <br />A representative profile of an alluvial fine sandy loam, sample point <br />MU 15 in map unit AW, 310 feet west and 20 feet north of the center <br />of Section 29, T. 7 S., R. 102 W. at an elevation of 5,250 feet is: <br />Al 0 to 2 inches; light brownish gray (2.SY 6/2) fine <br />sandy loam, brown (lOYR 5/3) moist; weak, very thin <br />platy parting to fine single grained structure; loose, <br />non-stocky and non-plastic; calcareous; few fine roots <br />pH 8.3; gradual smooth boundary. <br />CI 2 to 48 inches; pale brown (lOYR 6/3) stratified very <br />fine sand to medium sand, brown (lOYR 5/3) moist; fine <br />single grained structure; loose, non-sticky and non- <br />• plastic; calcareous; few fine roots; pH 8.1. <br />