共 8 条
[3]
GARDNER H. R., 1964, SOIL SCI SOC AMER PROD, V28, P457
[4]
KMOCH H. G., 1957, AGRON JOUR, V49, P20
[5]
SALIM MH, 1965, AGRON J, V57, P602
[6]
VRZALOVA J., 1969, Acta Universitatis Agriculturae, Brno, Facultas Agronomica, A, V17, P547
[8]
Weaver J. E., 1926, ROOT DEV FIELD CROPS, P291