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Effect of Fertilization on the Photosynthetic Characteristics of Alfalfa(Medicago sativa) in its branching period
Wei Xin ju, Jia Zhi kuan, Han Qing fang, Dong Zhi xin
Chinese Agricultural Science Bulletin . 2006, (12): 77 -77 .  DOI: 10.11924/j.issn.1000-6850.061277