Study of Diurnal Changes in Photosynthetic Rate and Quantum Efficiency of Grapevine Leaves and Their Utilization in Canopy Management COMPARATIVE STUDIES ON THE INTENSITY OF PHOTOSYNTHESIS BETWEEN Bt TRANSGENIC HYBRID COTTON AND ITS PARENTS STUDY ON THE STOMATAL AND NONSTOMATAL LIMITATION DURING THE DIURNAL COURSE OF PHOTOSYNTHESIS IN SOYBEAN LEAVES STUDY ON THE CHARACTERISTICS OF PHOTOSYNTHESIS IN GINKGO BILOBA L Effects of severity of water stress on gas exchange characteristics of Caragana intermedia seedlings Analysis of Causes of Midday Depression of Photosynthesis in Soybean Leaves