EXPERIMENTAL MODAL ANALYSIS FOR PANEL SAW Studies on Dynamic Characteristics of the Pigment Components of Ornamental Crabapple Cultivars Groups in Flowering Process VEGETATION COVER CHANGES OVER TIME AND ITS EFFECTS ON RESISTANCE TO WIND EROSION DISCOLORATION DYNAMIC CHARACTERISTICS OF APPLE SLICES AFTER ULTRA-HIGH TREATMENT Comprehensive Pattern of Primordium Initiation in Shoot Apex of Wheat STRUCTURAL DYNAMICS OF BAMBOO FOREST STANDS Studies on Dynamic Characteristics of the Pigment Components of Ornamental Crabapple Cultivars Groups in Flowering Process Dynamic Characteristics of Matter Population in Two Super Hybrid Rice Cultivars Dynamics of microbial biomass N in different fertilized black soil and its related factors