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Nitrogen accumulation, distribution and use efficiency of flue-cured tobacco under different soil texture Transformation mechanism and availability of nutrients in albic soil-plant system———Ⅰ.Phosphorus utilization rate in albic soil: a tracing study Yields, Market Values and N Use Efficiency in Fluecured Tobacco Influenced by Time of Basal N Fertilization ESTIMATING EFFECT OF PLANTING SOYBEAN ON PROFIT AND LOSS OF SOIL NITROGEN METHODS OF Na~+ EFFLUX RATE OF WHEAT ROOT MEASURED BY NUCLIDE TRACER PROGRESS OF REE TRACER TECHNIQUE IN SOIL EROSION A disease warning-source traceability model based on disaster chain-styled theory for solar greenhouse cucumber downy mildew Research on nitrogen assimilation after anthesis in high and low grain protein wheat cultivars Nicotine synthesis and nicotine-N source in flue-cured tobacco influenced by transplanting date and N fertilizer Comparison and thinking on tracing historical source and contemporary understanding of Chinese materia medica toxicity Comparison and thinking on tracing historical source and contemporary understanding of Chinese materia medica toxicity Studies on the Distribution of ¹⁴C Assimilation Products in Vitis amurensis Rupr. Establishment of traceable management information platform for quality safety of Panax ginseng TRANSPIRATION MEASUREMENT OF CHINESE PINE PLANTATION BY TRITIUM TRACER TECHNIQUE EFFECT OF DIFFERENT TRANSPLANTING LEAF AGE ON RICE YIELD, NITROGEN UTILIZATION EFFICIENCY AND FATE OF ¹⁵N-FERTILIZER PROBLEMS AND SUGGESTION ON RADIOISOTOPE TRACING EXPERIMENT VERTICAL DISTRIBUTION OF SOIL EROSION IN SLOPE WITH THE BELT DISCHARGE METHOD OF REE TRACER YIELD CONSTITUTE AND EFFECTIVE DISTRIBUTION OF ASSIMILATIVE PRODUCTS OF AMERICAN GINSENG EFFECTS OF THE TOTALLY BASAL DRESSING TECHNIQUE TO WHOLE PLOUGH LAYER ON FERTILIZER UTILIZATION OF DOUBLE HARVEST RICE BY ~(15)N、~(32)P TRACERS THE EFFECTS OF SOIL WATER CONDITIONS ON NITROGEN FERTILIZATION USE EFFICIENCY ABSORPTION AND UTILIZATION OF FERTILIZER-N AND SOIL-N WITH MIXED APPLICATION OF STRAW AND UREA BY RICE THE EXPLORATION OF NEW SYSTEM OF ISOTOPE TRACING TECHNIQUE IN CHINA PROGRESS OF NUCLIDE TRACING TECHNIQUE IN THE STUDY OF SOIL EROSION IN RECENT DECADE Fertilizer-N Uptake and Conversion Efficiency in 8 Species of Gramineous Pastures by Using ¹⁵ N-tracing Technique Studies on the Distribution of ¹⁴C Assimilation Products in Vitis amurensis Rupr. Absorption and Distribution of PM_2.5 NH₄⁺ and NO₃^- in Populus euramericana Neva. STUDIES ON THE FUNCTIONS OF DIFFERENT UNIT-ROOTS AND THE GROUPING OF ROOTS IN WINTER WHEAT A REVIEW ON THE BEHAVIOR OF()~7Be IN ECOSYSTEM Effects of Transplanting Time and Nitrogen Fertilizer on the Yield, Market Value and N Uptake of Flue-cured Tobacco by using 15N Tracing Technique Nitrogen Utilization Efficitncy and Fate of Fertilizer under Different Transplanting Density Effects of Nitrogen Application on Yield Formation and the Nitrogen Absorption and Utilization of Super Rice Based on ¹⁵N-tracing Spatial patterns of tillage erosion and its contribution to total erosion in loess region of China STUDY ON CHANGEABLE PROCESS OF SOIOL EROSION DISTRIBUTIVE CHARACTERISTICS ON THE SLOPE SURFACE BY REE TRACING METHOD Study on Soil Erosion Features of Small Catchment of Karst Plateau Wetland by ¹³⁷Cs Tracing Technology PHARMACOKINETICS OF PEGYLATED RECOMBINAN NEW HUMAN INTERLEUKIN-6 (PEG-rhIL-6) Nitrate contamination and source tracing from NO^-₃-δ¹⁵N in groundwater in Weifang, Shandong Province USING ⁷Be TO DOCUMENT SOIL EROSION ON THE WEED PLOTS Phosphorus Remobolization and Reuse in Maize Roots under Phosphorus Deficiency