THIN DENSITY CONTROL AND DEEP SOIL TENDING EFFECT ON CHINESE FIR IN FAST-GROWTH PHASE Analysis of Growth Process and Partition of Growth Phase on Poplar Clone I-69 Characterization of photosynthetic responses to shading and a light/shade switch during the rapid growth phase of tobacco (Nicotianatobacum L.) subjected to different fertilization regimes Effect of CO2 Concentration Doubling on Photosynthesis and Dry Matter Production in Different Growth Stages of Soybean Plant