共 23 条
[2]
BARTA AL, 1973, 193 OH AGR RES DEV C
[3]
BLANCHAR R. W., 1965, SOIL SCI SOC AMER PROC, V29, P71
[4]
BREMNER J. M., 1960, JOUR AGRIC SCI, V55, P11, DOI 10.1017/S0021859600021572
[6]
BURROUGHS W, 1970, NRCNAS4 WASH
[7]
DEWIT CT, 1963, 6915 WAG VERSL LANDB
[9]
Grunes D. L., 1970, Advances in Agronomy, V22, P331, DOI 10.1016/S0065-2113(08)60272-2
[10]
GRUNES DL, 1973, 4 CROP SCI SOC AM SP, P113