Acta Agrestia Sinica
Effect of Spraying Trace Element Fertilizers at Different Levels on Alfalfa Quality in Arid and Semiarid Areas of Northwestern China
WANG Qin, HAN Qing-fang, JIA Zhi-kuan
. 2008, (4): 408 -411 .  DOI: 10.11733/j.issn.1007-0435.2008.04.017