China Vegetables
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Effects of Different Ammonium and Nitrate Ratios on Lettuce Growth and Accumulation of Plant Nitrogen,Phosphorus and Potassium
LEI Yu-ling,CHEN Zi-yan,SONG Shi-wei*,CHEN Ri-yuan,LIU Hou-cheng,SUN Guang-wen
College of Horticulture,South China Agricultural University,Guangzhou 510642,Guangdong,China

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