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Impacts of Land Fragmentation and Cropping System on the Productivity and Efficiency of Grain Producers in the North China Plain: Taking Cangxian County of Hebei Province as an Example https://www.jorae.cn/EN/10.5814/j.issn.1674-764x.2020.06.005
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Impacts of Land Fragmentation and Cropping System on the Productivity and Efficiency of Grain Producers in the North China Plain: Taking Cangxian County of Hebei Province as an Example https://www.jorae.cn/EN/10.5814/j.issn.1674-764x.2020.06.005
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