nitrogenous fertilizer utilization ratio 第1页

EFFECT OF DISTRIBUTION MODES OF NITROGENOUS FERTILIZER ON WHEAT AND PEANUT YIELDS AND THE NITROGENOUS FERTILIZER UTILIZATION RATIO UNDER THE WHEAT PEANUT CROPPING SYSTEM COMPARISON OF NET PHOTOSYNTHETIC RATE AND ~(14)C DISTRIBUTION BETWEEN DIFFERENT CULTURAL CONDITIONS ON DOUBLE CROPPING RICE