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Study on the Effect Of Different Fertilizer on the Stable Nitrogen Isotope of Soil, Leaf and Cucumber The stable nitrogen isotope of size-fractioned plankton and its relationship with biomass during winter in Daya Bay 13C and 15N isotopic signatures of plant-soil continuum along a successional gradient in Ding-hushan Biosphere Reserve EFFECT OF DIFFERENT FERTILIZERS ON STABLE NITROGEN
ISOTOPE AND NITRATE CONTENT OF SOIL AND CHINESE CABBAGE