Suitable management density of multi-benefit management pattern in Pinus elli ottii plantation on hilly region of Jiangxi Province Tentative study on Effects of Intermediate Cutting in Slash Pine Plantation Landscape Evaluation and Management Model of Cotinus coggygria var. cinerea and Conifer Mixed Forest A STUDY ON THE PRODUCTIVIETY OF COMMON CHINAFIR (CUNNINGHAMIA LANCEOLATA) PLANTATION AT HILLY AREA IN DAGANG MOUNTAIN, JIANGXI PROVIENCE