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β diversity characteristic of vegetation community on south part of Gurbantunggut Desert and its interpretation Studies on the ¹⁵ N Absorption and Utilization Characteristics of Strawberry inDifferent N Application Stage Effects of Salt Stress on the Characteristics of Ion Absorption and Distribution in Puccinellia tenuiflora Transformation and utilization of N and C in ¹⁵N-labelled rice straw by goat Transferring and cycling of organic and inorganic nitrogen in micro-agroecosystem Study on the fate of nitrogen fertilizer in winter wheat/summer maize rotation system in Beijing suburban Effects of different management patterns on uptake, distribution and fate of nitrogen in wheat Study on the cycle and transformation of nitrogen in farming-stockbreeding-biogas ecosystem of rice areas STUDY ON EFFECT OF IRRIGATION ON SOIL NITRATE LEACHING AND UPTAKE STUDY ON THE GROWTH AND UTILIZATION OF NITROGEN FOR RICE UNDER THE DIFFERENT WATER MANAGEMENTS So il Respira tion of the Representa tive Artif ic ia l Forests Dur ing theM inor Growing Sea son in the Hilly Reg ion of North-China Effects of different management patterns on uptake, distribution and fate of nitrogen in summer maize Effects of dicyandiamide on nitrogen loss from cucumber planting soil in intensive greenhouse under different irrigation and nitrogen conditions Studies on the ¹⁵ N Absorption and Utilization Characteristics of Strawberry inDifferent N Application Stage Comparison of Soil Respiration under Various Land Uses in Hilly Area of Northern China EFFECT OF SODIUM CARBONATE STRESS ON AMINO ACID CONTENTS OF PUCCINELLIA TENUIFLORA SEEDLINGS Effect of nutritional condition on N₂O emission by crop seedlings——a sand liguid cross culture study EFFECT OF APPLYING UREA AND GREEN MANURE AZOLLA ON THE RICE GROWING AND NITROGEN UTLLIZATION EFFECIENCY Effects of different N rates on fate of N fertilizer and balance of soil N of winter wheat