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RELATIONSHIP BETWEEN DISTRIBUTION AND REDISTRIBUTION OF THE ASSIMILATES AND GRAIN YIELD IN BARLEY EFFECT OF RARE EARTH WITH HIGH-GRADE La ON THE YIELD,UPTAKE OF NITROGEN AND PHOSPHORUS BY SPRING WHEAT PRELIMINARY STUDIES ON IDENTIFICATION OF DROUGHT RESISTANCE FOR RICE BY USING RADIOISOTOPE TRACER TECHNIQUES Review of Nitrogen Cycle in Plant-soil System Based on Application of 15N Tracer Technique EFFECTS OF POTASSIUM APPLICATION ON THE ACCUMULATED NITROGEN SOURCE AND YIELD OF PEANUT Fertilizer-N Uptake and Distribution in Rice Plants Using 15N Tracer Technique PROSPECT AND CURRENT SITUATION SURVEY OF NUCLEAR AGRICULTURAL RESEARCH IN CHINA THE BUDGET BETWEEN TRANSPORTATION AND ACCUMULATION OF ORGANIC CARBON AND TOTAL NITROGEN IN BLACK SOIL AT A SLOPING FARMLAND Distribution and Fate of Anthropogenic Nitrogen in the Calamagrostis angustifolia Wetland Ecosystem of Sanjiang Plain, Northeast China CHARACTERISTICS OF TRANSPORTATION AND DISTRIBUTION OF PHOTOASSIMILATES IN SUPER HYBRID RICE COMBINATIONS COMPARISON OF NH_4~+-N AND NO_3~--N NUTRITION IN HYBRID AND CONVENTIONAL RICE AT THE LATE GROWTH STAGE STUDY ON EFFECT OF THE PLANT GROWTH REGULATOR SD-100 ON TOMATO THE TRANSFORMATION AND TRANSLOCATION OF ~(14)C-LABELLED GLUCOSE IN THE COURSE OF GRANULATION DEVELOPMENT OF Batangas mandarin FRUITS Influence of Water Management and Tillage Patterns on Nitrogen Utilization of Rice METABOLISM OF DIET UREA IN THE RUMEN in vitro BY 15NTRACER TECHNIQUE Nitrogen absorption/distribution and physiological characteristics of Salix matsudana seedlings grown in hydroponic solution Investigation on the economically-ecologically appropriate amount of nitrogen fertilizer applied in rice production in Fe-leaching-Stagnic Anthrosols of the Taihu Lake region The role of the isotope tracer technique in ecological research of arbuscular mycorrhizal fungi