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Effects of nitrogen application on seed yield and nitrogen accumulation in alfalfa ( Medicago sativa)
CHEN Ling-Ling, REN Wei, MAO Pei-Sheng, WU Ren-Tu-Ya, WANG Sheng-Nan, LIANG Qing-Wei
Acta Prataculturae Sinica . 2017, (6): 98 -104 .  DOI: 10.11686/cyxb2016265