作物定位轮作体系长期试验研究(Ⅲ)--轮作与连作对土壤微生物数量的影响
작물정위륜작체계장기시험연구(Ⅲ)--륜작여련작대토양미생물수량적영향
Long-term crop rotation research (Ⅲ)-- Effect of crop rotation and continuous cropping on the quantity of microbe in soil
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