A PRELIMINARY STUDY ON THE NET PHOTOSYNTHESIS OF MASSON‘S PINE Foliar nutrient content and resorption efficiency of Pinus massoniana in the subtropical red soil erosion region STUDY ON THE DYNAMIC MODELING OF LEAF AGE AND LEAF AREA INDEX CHANGE OF POTATO Leaf Age Model of Cotton and It‘s Application Studies on the Effect of Vernalization in Barley RELATIONSHIP BETWEEN IFAF AGE OF PEAR AND ITS RESISTANCE TO VENTURIA NASHICOLA A Preliminary Study on Light-photosynthetic Characteristic in the Leaves at Various Age for Aneurolepidium Chinense Comparative and the correlative studies on the structure and the content of anthraquinones in 3 Aloe leaves Variability and association of leaf traits between current-year and former-year leaves in evergreen trees in Tiantong, Zhejiang, China Compar isons of Ascorbic Ac id Contents and Activ ities of Metabolism Relative Enzymes in Apple Leaves of Various Ages The Relationship Between the Clonal Growth and the Density of Adult Shoots with Different Leaf Age in Phyllostachys pubescens Mazel Density Regulation of the Clonal Growth of New Shoots in the Giant Bamboo Phyllostachys pubescens in Subtropical China Variation of Chloroplast Pigments of Various Age Leaves along Elevation Gradients of Dominant Species in Castanopsis carlessi Forests in Lingshishan National Forest Park Compar isons of Ascorbic Ac id Contents and Activ ities of Metabolism Relative Enzymes in Apple Leaves of Various Ages Decrease of Photosystem II Photochemistry in Arabidopsis ppt1 Mutant Is Dependent on Leaf Age Effects of water on photosynthesis in different age of tomato leaves Seasonal Dynamic of Growth of Phalaris arundinacea in Beigu Mountain Wetland in Zhenjiang Suitable amount of N topdressing based on leaf age index of maize using mulched drip irrigation technology in Western Songnen Plain Photosynthetic Characteristics of Picea schrenkiana var. tianschanica of Different Age Classes in a Natural Stand in the Central Part of Tianshan Mountains Photosynthetic Characteristics and Their Relationships with Leaf Nitrogen Content and Nitrogen Allocation in Leaves at Different Leaf Age THE EFFECTS OF LEAF AGE AND DIFFERENT POSITIONS ON CANOPIES ON PHOTOSYNTHETIC RATE OF HUANGHUA PEAR Comparison of total flavonoids content in 14 species of Camellia sect.Chrysantha Effect of Short-Day Photoperiod on Adzuki Bean (Phase-out angularis) Seedlings at Different Leaf Ages STUDIES ON CHROMOSOME DOUBLING, TRANSPLANTING AND MANAGEMENT OF TUBE SHOOTS IN WHEAT Nutrition and Growth of Leaves at Different Leaf Ages in Tetraploid Robinia pseudoacacia