共 13 条
[1]
[Anonymous], 1970, TECHN INT C ADV AUT
[3]
BLACK CA, 1968, SOIL PLANT RELATIONS, pCH5
[4]
CAMPBELL CA, 1983, CAN J PLANT SCI, V63, P91
[5]
CAMPBELL CA, 1983, SOIL EROSION LAND DE, P266
[9]
McKeague J.A., 1978, MANUAL SOIL SAMPLING, P66
[10]
Mitchell J., 1944, 12 U SASK SOIL SURV