共 29 条
[1]
ALLAWAY W. H., 1968, Advances in Agronomy, V20, P235
[2]
ALLCROFT R, 1959, I BIOL S, V8, P95
[3]
BRADFORD GORDON R., 1966, P33
[4]
CHAPMAN H.E., 1966, DIAGNOSTIC CRITERIA
[6]
DYE WB, 1959, NEVADA U AGR EXP STN, V280
[7]
Eaton FM, 1944, J AGRIC RES, V69, P0237
[9]
Gupta U. C., 1979, Journal of Agronomy, V31, P273
[10]
HAND JW, 1969, COLO GEOL SURV SPECI, V1, P33