China Vegetables
  
  2005, Vol. 1 Issue (9): 7-9    DOI:
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Effect of Ratio of Urea to Ammonium Chloride on Nitrate Content in Brassica campestris L. ssp. chinensis var. utilis Tsen et Lee
Su Tianming;Gu Minghua;Li Xiaofeng; et al.
Soil and Fertilizer Institute of Guangxi Academy of Agricultural Sciences; Nanning 530007; Agriculture Department of Guangxi University

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