Demographic Genetic Structure of Cryptomeria japonica var. sinensis in Tianmushan Nature Reserve, China Seasonal Dynamics of Litterfall and Nutrient Concentrations in Leaf Litter in Scenic Forests of Nagoga STUDIES ON THE BIOMASS DYNAMICS OF CRlTOMERIA JAPONICA(L.F)DON PLANTATION Effect of Pretreatment with Freezhing on Carbonization of Sugi (Cryptomeria japonica) Sapwood