Acta Agrestia Sinica
Influence of Selenium and Cobalt Fertilizers on the Growth of Alfalfa
GUO Xiao, JIE Xiao-lei, HUA Dang-ling, LIU Shi-liang, LIU Fang
. 2008, (6): 640 -645 .  DOI: 10.11733/j.issn.1007-0435.2008.06.019