Acta Agrestia Sinica
Effects of Different N Levels on Productivity and Quality of Alfalfa Varieties
LIU Xiao-jing, LIU Yan-nan, KUAI Jia-lin, QI Min-xing, ZHANG Xiao-lei
. 2013, (4): 702 -707 .  DOI: 10.11733/j.issn.1007-0435.2013.04.012