共 7 条
[1]
DAN J, 1962, SOILS SOIL ASSOCIATI
[2]
HAGIN J, 1963, EMPIRE J EXP AGR, V31, P186
[3]
JACOB A, 1963, VERLAGSG ACKERBAU
[4]
LACHOVER D., 1964, Oleagineux, V19, P11
[5]
RICHARDS LA, 1954, 60 USDA HANDB ED
[6]
WOODRUFF C. M., 1955, SOIL SCI SOC AMER PROC, V19, P167
[7]
WOODRUFF CM, 1960, 7 T INT C SOIL SCI M, V3, P80