Relation of Wind-induced Sand Displacement to Plant Biomass and Plant Sand-binding Capacity Phenotypic Plasticity in Response to the Heterogeneous Water Supply in the Rhizomatous Grass Species, Calamagrostis epigejos in the Mu Us Sandy Land of China Density-Dependence of Calamagrostis epigejos in Songnen Grassland Study on Dynamics of Calorific Value, Biomass and Energy in Calamagrostis epigejos Population in Songnen Grassland (in English)