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.. ~. S. DEPARTMENT OF AGRICULTURE TURAL RESOURCES CONSERVATION SERVICE CDNSTRUCTION MATERIALS -- CONSTRUCTION MATERIALS--Continued PAGE 3 OF 3 02/1S/91 opsail is used tc cover an area so that vegetation can be established end maintained. The upper 60 inches of a soil s evaluated for use as topsoil. Also evaluated is the reclamation potential of the borrow area, Plant growth is ifected by toxic material and by such properties as soi! reaction, available water capacity, and fertility, the ease f excavating, loading, and spreading is affected by rock fragments, slope, a eater table, soil texture, and thickness f suitable material. Reclamation of the borrow area is affected by slope, a water table, rock fragments, bedrock, nd toxic material. oils rate 'Good' have friable loamy material to a depth of at least 60 inches. They are free of stones and cobbles, ave little or no gravel, and have Slopes of less than 8 percent. They ere low in content of soluble salts, are afurally fertile or respond well to fertilizer, and are not so wet that excavation is difficult. oils rated 'Fair' are sandy soils, loamy soils that have a relatively high content of clay, soils that have only 20 0 40 inches of suitable material, soils that have an appreciable amount of gravel, stones, or soluble salts, or oils that have slopes of B to 15 percent, the soils are not so wet that excavation is difficult. oils rate 'Poor` are very sandy or clayey, have less than 20 inches of suitable material, have a large amount of ravel, stones, or soluble salts, have slopes of more than 15 percent, or have a seasonal water table at or near the surface. The surface layer of most sails is generally preferred for topsoil because of it organic matter content. )rganic matter greatly increases the absorption and retention of moisture and nutrients for plant growth. fiECEI!/ED -APR' 10 2002 _.._ ,., .. _- ' '- f ' _. Oivisioa of Ma~arals and Gmobgp