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Emergy Analysis of Agroecosystem Productivity of Typical Valley in Loess Hilly-gully Region of the Loess Plateau: A Case Study in Zhifanggou Valley of Ansai County https://www.geog.com.cn/EN/10.11821/xb200402008
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Emergy Analysis of Agroecosystem Productivity of Typical Valley in Loess Hilly-gully Region of the Loess Plateau: A Case Study in Zhifanggou Valley of Ansai County https://www.geog.com.cn/EN/10.11821/xb200402008
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