共 22 条
[1]
ARMIGER W. H., 1957, SOIL SCI SOC AMER PROC, V21, P183
[2]
BOULDIN DR, 1959, P SOIL SCI SOC AM, V23, P281
[4]
GHILDAYAL BP, 1975, RESULTS FIELD TRIALS
[5]
HUNDAL HS, IN PRESS
[6]
Jackson M L, 1967, SOIL CHEMICAL ANALYS
[7]
LEHR JR, 1972, Y43 TENN VALL AUTH N
[8]
MAPSTONE GE, 1954, CHEM IND, V20, P577
[9]
MEHROTRA CL, 1966, FERTILIZER NEWS, V11, P10
[10]
OLSEN SR, 1954, 939 US DEP AGR CIR 2, P1044