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Effect of Leaf Surface Spurting Cobalt Sulfate on the Fresh Grass Yield and Quality of Alfalfa
Ma Chuang, Cui Haiyan, Liu Shiliang, Jie Xiaolei,, Hua Dangling, Liu Fang, Hu Huafeng
Chinese Agricultural Science Bulletin . 2007, (9): 8 -8 .  DOI: 10.11924/j.issn.1000-6850.070958