Spectrum analysis in steppe vegetation research SPECTRUM ANALYSIS ON INDIVIDUAL GROWTH PROCESS OF BETULA PLATYPHYLLA FROM NORTH OF SHANXI PROVINCE Growth Cycle of Phyllostachys edulis Stand in Tianmu Mountain Based on Spectrum Analysis Comparative Analysis of Proteomics in Cotton(Gossypium hirsutum L.) Leaves with Different Drought Resistance Levels under Drought Stress Life Tables and Fluctuation Cycle of Juglans cathayensis Populations on Different Slope Aspects in Wild Walnut Natural Conservation Area of Xinjiang,China Utilization of organic resources in paper pulp waste liquid Demography and spectrum analysis of Juglans cathayensis populations at different altitudes in the west Tianshan valley in Xinjiang, China. Dynamic Tensile Force Measure and Analysis of Woodworking Band Saw Blades A comparative study of the stomata and PM2.5 particles on the leaf surface of Chinese white poplar (Populus tomentosa Carr.) in different polluted places