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

[31] Daniel H.A., 1936, P NATL ACAD SCI USA, V79, P7598, DOI [10.2134/agronj1936.00021962002800080001x, DOI 10.2134/AGRONJ1936.00021962002800080001X]

[32] DANIEL HA, 1943, 837 US DEP AGR TECH

[33] DANIEL HARLEY A., 1936, JOUR AMER SOC AGRON, V28, P570

[34] ECK H. V., 1965, SOIL SCI SOC AMER PROC, V29, P209

[35] EFFECT OF TOPSOIL REMOVAL ON NITROGEN-SUPPLYING ABILITY OF PULLMAN SILTY CLAY LOAM [J]. SOIL SCIENCE SOCIETY OF AMERICA PROCEEDINGS, 1968, 32 (05): : 686 - &

[36] ECK HV, 1967, 11 US DEP AGR CONS R

[37] ECK HV, 1961, SOIL SCI SOC AM P, V33, P578

[38] ENGELSTAD O. P., 1961, SOIL SCI AMER PROC, V25, P494

[39] ENGELSTAD O. P., 1961, SOIL SCI SOC AMER PROC, V25, P497

[40] RECOVERY OF CORN YIELD ON GARDENA SUBSOIL AS RELATED TO LEAF AND SOIL ANALYSIS [J]. SOIL SCIENCE SOCIETY OF AMERICA JOURNAL, 1974, 38 (02) : 327 - 331

[31] Daniel H.A., 1936, P NATL ACAD SCI USA, V79, P7598, DOI [10.2134/agronj1936.00021962002800080001x, DOI 10.2134/AGRONJ1936.00021962002800080001X]

[32] DANIEL HA, 1943, 837 US DEP AGR TECH

[33] DANIEL HARLEY A., 1936, JOUR AMER SOC AGRON, V28, P570

[34] ECK H. V., 1965, SOIL SCI SOC AMER PROC, V29, P209

[35] EFFECT OF TOPSOIL REMOVAL ON NITROGEN-SUPPLYING ABILITY OF PULLMAN SILTY CLAY LOAM [J]. SOIL SCIENCE SOCIETY OF AMERICA PROCEEDINGS, 1968, 32 (05): : 686 - &

[36] ECK HV, 1967, 11 US DEP AGR CONS R

[37] ECK HV, 1961, SOIL SCI SOC AM P, V33, P578

[38] ENGELSTAD O. P., 1961, SOIL SCI AMER PROC, V25, P494

[39] ENGELSTAD O. P., 1961, SOIL SCI SOC AMER PROC, V25, P497

[40] RECOVERY OF CORN YIELD ON GARDENA SUBSOIL AS RELATED TO LEAF AND SOIL ANALYSIS [J]. SOIL SCIENCE SOCIETY OF AMERICA JOURNAL, 1974, 38 (02) : 327 - 331