共 41 条
[1]
BALLANTYNE SK, 1963, CAN J SOIL SCI, V48, P43
[2]
BAUER A, 1968, N DAKOTA AGR EXP STA, V25, P6
[3]
BERGMAN JW, 1979, CAPSULE INFO SERIES, V8
[5]
BLACK AL, 1976, J SOIL WATER CONSERV, V31, P101
[7]
BLACK AL, 1971, J SOIL WATER CONSERV, V26, P107
[9]
BLACK AL, 1976, COOP EXT SERV B, V1132, P286
[10]
BLACK AL, 1973, SUMMER FALLOW WESTER, P36