共 35 条
[2]
[Anonymous], 1977, WORLDS WORST WEEDS D
[3]
Bergersen F. J., 1980, Methods for evaluating biological nitrogen fixation., P65
[4]
AN EVALUATION OF N-15 METHODS FOR ESTIMATING NITROGEN-FIXATION IN A SUBTERRANEAN CLOVER PERENNIAL RYEGRASS SWARD
[J].
AUSTRALIAN JOURNAL OF AGRICULTURAL RESEARCH,
1983, 34 (04)
:391-401
[5]
Bremner J., 1965, METHODS SOIL ANAL 2, P1149
[8]
Neyra C. A., 1977, Advances in Agronomy, V29, P1

