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  2004, Vol. 22 Issue (0409): 14-17    DOI:
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STORING THE GRAIN PRODUCTIVITY IN FARMLANDS——THE BASE OF CHINA’S GRAIN SECURITY
YANG Zheng-li1, WEI Hong2
1. Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China;2. Linfeng Institute of Professional Technology, Linfen 041000, Shanxi Province, China

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