共 19 条
[1]
BARBER STANLEY A., 1968, P163
[2]
BARNETT RM, 1936, 292 FLOR AGR EXP STA
[4]
BRINKERHOFF F., 1967, MICH AGR EXP STA QUART BULL, V49, P262
[5]
BURLESON C. A., 1961, SOIL SCI SOC AMER PROC, V25, P365
[6]
CHESNIN L, 1967, FARM TECHNOL, V23, P28
[7]
ELLIS ROSCOE Jr., 1964, SOIL SCI SOC AMER PROC, V28, P83
[8]
FOLLET RH, 1970, 110 COL AGR EXP STA
[10]
HIATT A. J., 1958, AGRON JOUR, V50, P22