Effects of continuous turnover of Astragalus sinicus on rice yield and N absorption, distribution and residue  in single-cropping rice regions of Fujian Province The effect of groundwater depth on the δ13C value of constructive species leaf in the lower reaches of the Tarim River COMPARISON ON THE PHYSIOLOGICAL PARAMETERS OF FIVE YULANIA SPECIES Nitrogen accumulation, distribution and use efficiency of flue-cured tobacco under different soil texture Ecophysiological Responses of Seedlings of Hippophae neurocarpa to Elevated Carbon Dioxide Characteristics of N Accumulation and Translocation in Rice Genotypes with Different N Use Efficiencies Difference in δ13C and gas exchange parameters among Populus tomentosa clones A Study on Foliar Carbon Isotope Composition(δ13C) and Water Use Efficiency of Different Populus deltoides Clones under Water Stress RESPONSES OF PHOTOSYNTHESIS ON WATER STRESS FOR SHRUBS FROM TROPICAL RAIN FOREST AND SUBTROPICAL MONSOON FOREST Genetic Variation in Photosynthetic Characteristics and Photosynthetic Nitrogen Use Efficiency in Tropical Rice Impact of localized compaction and ridge fertilization on field nitrate transport and nitrate use efficiency Water Physiological Characteristics of Introduced Alnus formosana Effects of Different Nitrogen Fertilizer Rates on Nitrogen Absorption by Ryegrass(Lolium muliiflorum) under Salt Stress Genomic DNA Sequence,Gene Structure,Conserved Domains,and Natural Alleles of Gln1-4 Gene in Maize Effects of CO2 Concentration on Tall Fescue Drought Resistance and Water Use Efficiency Research advances in the calculating method of nitrogen use efficiency (NUE) in cultivated lands. REVIEW OF RETRIEVAL LIGHT USE EFFICIENCY USING PHOTOCHEMICAL REFLECTANCE INDEX (PRI) The Distribution and Use Efficiency of Nitrogen in Phyllostachys edulis Forest Relations between Stable Carbon Isotope Discrimination and Water Use Efficiency as well as Growth for Poplar Responses of Foliar δ13C Values of Woody Plants to Different Karst Rocky Desertification Degrees in Huajiang Gorge, Guizhou Genomic DNA Sequence, Gene Structure, Conserved Domains, and Natural Alleles of Gln1-3 Gene in Maize Genotypic Variation in Ammonia Volatilization Rate of Rice Shoots and Its Relationship with Nitrogen Use Efficiency Effects of Elevated Air Temperature and Carbon Dioxide Concentration on the Nitrogen Use of Double Rice (Oryza sativa L.) in Open-top Chambers Transformation of Barnyardgrass (Echinochloa crusgalli) Root Type Phosphoenolpyruvate Carboxylase Gene into Rice (Oryza sativa) Plants and Their Effects on Photosynthesitic Gas Exchange The responses and mechanisms of water use efficiency to different water stresses of three alfalfa varieties Subdivision of Nitrogen Use Efficiency of Rice Based on 15N Tracer Response of root growth of rice genotypes with different N use efficiency to enhanced nitrate nutrition