More than twenty years has passed since the theory of coupling agricultural systems inatiated by Ren Jizhou, academician of Chinese academy of science, in the middle and later of 1980s, but now the study is still restricted in discussing on the conceptions, mechanisims, functions of the agricultural coupling systems, and introducing on the ecological benefits and economic benefits qualitatively or semi-quantitatively after the agricultural systems were coupled. And also, the stuty regions were mainly ...
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