Characteristics of absorption, distribution and utilization of 15N in Red Globle Grape under fertilizer application in different depths Transformation and utilization of N and C in 15N-labelled rice straw by goat Absorption and Partition of Different Nitrogen Forms in Strawberry STUDY ON THE GROWTH AND UTILIZATION OF NITROGEN FOR RICE UNDER THE DIFFERENT WATER MANAGEMENTS Studies on the 15 N Absorption and Utilization Characteristics of Strawberry inDifferent N Application Stage Absorption and Partition of Different Nitrogen Forms in Strawberry Transformation mechanism and availability of nutrients in albic soil-plant system———Ⅰ.Phosphorus utilization rate in albic soil: a tracing study Studies on the 15 N Absorption and Utilization Characteristics of Strawberry inDifferent N Application Stage