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自从H·Jenny提出“生态样块”学说以来,并随着实验土壤学的发展,人们可以取一定的土壤胞体代表某一土壤系统,研究系统中物质循环及作物
Since Jenkins proposed the theory of “ecology model” and with the development of experimental soil science, one can take certain soil cell body to represent a soil system, study the system of material circulation and crop