SOIL-EROSION EFFECTS ON SOIL - PRODUCTIVITY - A RESEARCH PERSPECTIVE

[11] BELL FF, 1977, ECOLOGY AGR PRODUCTI, P45

[12] The Problem of Soil Erosion in the United States [J]. ANNALS OF THE ASSOCIATION OF AMERICAN GEOGRAPHERS, 1931, 21 (03) : 147 - 170

[13] Bennett H. H., 1939, SOIL CONSERVATION

[14] BLACK AL, 1979, J SOIL WATER CONSERV, V34, P220

[15] BORST HL, 1945, 888 US DEP AGR TECH

[16] SOIL DETERIORATION AND GROWING WORLD DEMAND FOR FOOD [J]. SCIENCE, 1977, 197 (4304) : 625 - 630

[17] BUNTLEY GJ, 1976, 561 TENN AGR EXP STA

[18] CARLSON C. W., 1961, SOIL SCI SOC AMER PROC, V25, P44

[19] CARLSON C. W., 1958, SOIL SCI SOC AMER PROC, V22, P140

[20] CARLSON CW, 1961, RECLAMATION ERA, V47, P17

[11] BELL FF, 1977, ECOLOGY AGR PRODUCTI, P45

[12] The Problem of Soil Erosion in the United States [J]. ANNALS OF THE ASSOCIATION OF AMERICAN GEOGRAPHERS, 1931, 21 (03) : 147 - 170

[13] Bennett H. H., 1939, SOIL CONSERVATION

[14] BLACK AL, 1979, J SOIL WATER CONSERV, V34, P220

[15] BORST HL, 1945, 888 US DEP AGR TECH

[16] SOIL DETERIORATION AND GROWING WORLD DEMAND FOR FOOD [J]. SCIENCE, 1977, 197 (4304) : 625 - 630

[17] BUNTLEY GJ, 1976, 561 TENN AGR EXP STA

[18] CARLSON C. W., 1961, SOIL SCI SOC AMER PROC, V25, P44

[19] CARLSON C. W., 1958, SOIL SCI SOC AMER PROC, V22, P140

[20] CARLSON CW, 1961, RECLAMATION ERA, V47, P17