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Biological Cycles of Mineral Elements in a Young Mixed Stand in Abandoned Mining Soils The accumulation,allocation and biological cycle of the nutrient elements in Carex lasiocarpa wetland THE ACCUMULATION AND BIOLOGICAL CYCLE OF NITROGEN AND PHOSPHRUS ELEMENTS IN RHIZOPHORS STYLOSA COMMUNITY ,GUANGXI Study on the Accumulation and Biological Cycles of K,Ca and Mg in Rhizophora stylosa Mangrove Community in Guangxi Accumulation and biological cycle of elements Ca and Mg in Bruguiera sexangula community of Hainan Island in China Distribution and Biological Cycle of Nutrients in Cryptocarya concinna/Lindera chunii Community in Dinghushan ACCUMULATION AND BIOLOGICAL CYCLE OF NITROGEN AND PHOSPHORUS IN PINUS TAIWANENSIS COMMUNITY IN WUYI MOUNTAINS Accumulation and Biological Cycle of K and Na Elements in Bruguiera sexangula Community Research on Biological Cycle of Nutrient Elements in Plantation of Rubber Intercropped with Amomum Longiligulare