Effects of Zinc on Two Phytoplanktons in Fresh Water Tree Classification for Pinus tabulaeformis Scenic Plantation Study on the dormancy type of seeds of four species of wild Iris in China Water Use Strategy of Leymus chinensis and Its Population Growth Potential Basis on Water Balance A Study on Taiwania flousiana’s Ecoadaptation and Introduction Potentiality Effects of Different Treatment on Root Growth Potential of Chinese fir Seedlings after Lifting A study on the causes of Iris tenuifolin dormancy and the methods for breaking dormancy Relationship between growth potential of pine,population density of Monochamus alternatus and pathogenicity of Bursaphlenchus xyloophilus Effect of substitution ratio of Imperata koenigii on competitiveness and growth potential of three species of cold season lawn grass