Afforestation techniques 第1页

Techniques for Afforestation in the Extremely DegenerativeMountainous Land of Dry and Hot Areain Nanjian,Yunnan Province The Silviculture of Calophyllum polyanthum (Guttiferae)in China STUDIES ON THE AFFORESTATION TECHNIQUES FOR THREE OAK SPECIES INTHE SEMIARID AREAS OF WESTERN LIAONING PROVINCE