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CHEMICAL METHODS <br />1-3 Standard Procedures <br />4. Water extractable after 24-48 hrs. <br />5. Standard Procedure <br />6. Walkley-Black <br />7. Sodium bicarbonate method <br />8. Exchangeable <br />9. Sieve and hydrometer method <br />SOIL CHARACTERISTICS <br />The soil survey map is located in the appendix of this section, and shows <br />the extent of each soil series and the expected topsoil stripping depth. <br />The map unit descriptions are il lustrated on Table 1. <br />ROUTT LOAM 2VD-3 TO 25 PERCENT SLOPES <br />This is a deep, well drained soil on gently sloping to moderately steep <br />benches and mountain side slopes. It appears to have formed in mixed <br />j~'Z„ colluvium and residuum. <br />Typically, the surface Iayer is very dark grayish brown to brown loam <br />about 26 inches thick. The upper subsoil layer is yellowish brown clay <br />loam about 12 inches thick, with light uncoated sand grains occuring on <br />the faces of peds. The lower subsoil is yellowish brown and light yellowish <br />brown, heavy silty clay loam extending to 60 inches or more. <br />Permeability is very slow. Effective rooting depth is 60 inches or more. <br />Available water capacity is high. Surface runoff is medium. <br />Most of this unit is native rangeland used for livestock grazing and wild- <br />Iife habitat. <br />ROUTT LOAM. 2VF. 25 to 65 PERCENT SLOPES <br />This is a deep, well drained soil on moderately to very steep mountain side <br />slopes. It is formed in mixed colluvium and residuum. <br />Most of this unit is native rangeland used for livestock grazing and wildlife <br />.` habitat. <br />