河南永城采煤塌陷复垦区不同复垦年限土壤理化性质的研究
하남영성채매탑함복은구불동복은년한토양이화성질적연구
Study on Soil Physical and Chemical Properties of Different Reclamation Years in Coal Mining Subsidence Reclamation Area in Yongcheng, Henan Province
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