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    Chapter and Conference Paper

    Double Crop** of Rice in Triple Crop** System and Soil Fertility

    Since the 1970s, the continual extension of double crop** of rice in triple crop** system has promoted the production to a certain extent but has brought about some adverse effects on soils in the western ...

    Yang Wen-yuan, Liang Dun-fu, **e Chun-qing… in Proceedings of Symposium on Paddy Soils (1981)