Impact of N Application on the Yield of Alfalfa,N Accumulation and Nitrogen Use Efficiency
HAN Si-xun, WANG Sen, GAO Zhi-ling, WANG Dian-wu
ACTA AGRICULTURAE BOREALI-SINICA . 2014, (6): 220 -225 .  DOI: 10.7668/hbnxb.2014.06.037