Acta Agrestia Sinica
Correlation and Effects of Exogenous Nitrogen on Nitrogenase Activity and Ureide Content of Medicago sativa L.
FENG Bo-zheng, LIU Xiao-jing, HAO Feng, YU Tie-feng
Acta Agrestia Sinica . 2016, (2): 351 -357 .  DOI: 10.11733/j.issn.1007-0435.2016.02.016