The ecological multi-layer structure model of economic forest and its application in hilly areas The assessment of forest ecosystem services evaluation for shrubbery-economic forest-bamboo forest in China Niche-Fitness Model into Multi-Suitability Evaluation of Economic Forest Based on GIS in Poyang Lake Region Study on Environmental Qualification of Areas for Producing Harmless Dry Fruits in China STUDY ON CONSTRUCTION PATTERNS OF SOIL AND WATER CONSERVATION VEGETATION WITH AGROFORESTRY IN THE WEST OF LIAONING TECHNIQUSE AND EFFECTS OF APPLING THE RARE-EARTH TO FORESTY A STUDY ON THE ECONOMIC FOREST PATTERN OF DOUBLE TERRACED FIELD WITH SLOPE INTERVAL IN THE CALCAREOUS ROCK AREA OF TAIHANG MOUNTAIN Study on the Economic Threshold Value for Zokor Control of Economic Forest in Guyuan Replacing Agriculture by Afforestation