共 11 条
[1]
AHMAD N, 1974, TROP AGR, V51, P313
[2]
ALLEYNE E. P., 1966, TROP AGR, V43, P323
[3]
ELSWAIFY SA, 1977, SOIL CONSERVATION MA, P71
[4]
Hudson N.W., 1976, SOIL CONSERVATION
[5]
LAL R, 1975, TECH B IITA, V1
[6]
Lal R., 1976, IITA MONOGRAPH, V1
[8]
SHENG TC, 1973, FOSFJAM505 UND FAOUN
[9]
SMITH GD, 1974, REPORT STUDY CORRELA
[10]
SMITH RM, 1955, U PEURTO RICO AGR EX, V125