Species composition and correlation of understorey woody plants in chinese fir plantation in the lower subtropical area A Preliminary Report on the Dynamic of the Herbage Communities in a Youn g Planted Woodland in the Hilly Area of Central Sicchuan Concentrations and Spatial Distribution of Polycyclic Aromatic Hydrocarbons (PAHs) in a Cinnamomum camphora Stand The Effects of Thinning on Forest Growth and Model Study Review of Studies on Understorey of Plantations Effects of Nitrogen Addition and Mixture with Understorey Plant Leaves on Decompositions and Nitrogen Releases of Chinese Fir Needle Litter