Effects of Structure Features of Fuelbed Composed of Scots Pine Needles on Equilibrium Moisture Content Parameters during Desorption Process Crown Structure Model and Three Dimensional Computer Graphics Simulation for Mongolian Scots Pine Plantation TIMBER PRODUCTIVITY OF YOUNG MONGOLIAN SCOTS PINE PLANTATION IN EASTERN MOUNTAIN REGIONS OF NORTHEAST CHINA Modeling for Primary Branch Length and Branch Diameter of Mongolian Scots Pine Trees PSII Photoinhibition and O-·2 Production