共 10 条
[1]
DOUGHTY J. L., 1954, CANADIAN JOUR AGRIC SCI, V34, P406
[2]
DOUGHTY JL, 1952, AGRICULTURAL RESEARC, P31
[3]
EHRLICH WA, 1953, 5 SOILS REP PUBL BRA
[5]
HEDLIN R. A., 1964, AGRON J, V56, P425
[6]
HILL K. W., 1954, SOIL SCI SOC AMER PROC, V18, P182
[7]
PEECH M, 1947, 757 US DEP AGR CIRC
[8]
POYSER E. A., 1957, CANADIAN JOUR SOIL SCI, V37, P48
[9]
RIDLEY A. O., 1962, CANADIAN JOUR SOIL SCI, V42, P137
[10]
SOPER R. J., 1963, CANADIAN JOUR SOIL SCI, V43, P350