共 16 条
[1]
BEYERS CP, 1969, AGR SCI S AFRICA AGR, V1, P41
[2]
Black PR., 1965, METHODS SOIL ANAL, P545, DOI DOI 10.2134/AGRONMONOGR9.1.C43
[3]
CARPENTIER JM, 1967, COLLOQUE FERTILITE T, V1, P286
[4]
CHAPMAN H.E., 1966, DIAGNOSTIC CRITERIA
[5]
COREY RB, 1970, 6 P ANN C AGR SOC NI, V7, P55
[6]
CUNNINGHAM RK, 1964, EMPIRE J EXP AGR, V32, P42
[7]
DIVES W. K., 1970, Modern Farming, V6, P11
[8]
EGBE NE, 1972, 4 INT COC RES C TRIN
[9]
FERRAND MA, 1951, OLEAGINEUX, V11, P629
[10]
FUEHRING H. D., 1964, SOIL SCI SOC AMER PROC, V28, P79