A STUDY ON PHOTOSYNTHESIS:MODELING AND SCALING UP FROM A LEAF TO CANOPY IN A CHINESE FIR PLANTATION Traits of canopy respiration and its relationship with canopy photosynthesis in summer-sowing millet (Setaria italica Beauv.) Review on Forest Canopy Structure,Radiation Transfer and Canopy Photosynthesis Regulating Effects of Canopy light (PAR) interception and Distribution on Photosynthate Relationship between Canopy Photosynthesis Characteristics of Nitraria sphaerocarpa and Environmental Factors in Hexi Corridor Desert Effects of excessive nitrogen supply on productivity of winter wheat