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THE EFFECT OF FERTILIZATION IN POPULUS EURAMERICANA CV. Ⅰ-214 FOREST LAND Research on the Fertilization of Chinese Fir Seed Orchard Synthetic Analysis on the Fertilization Effects for Young Pinus massoniana Plantation Study on the Effect of Fertilization on Eucalyptus globulus Plantation in Yunnan EFFECTS OF FERTILIZATION IN THE DIFFERENT SITE TYPES OF SOIL FOR POPLAR TREE RESEARCH ON FERTILIZATION TECHNIQUE AND ITS EFFECT OF EIGHT CHINESE FIR SEED ORCHARDS IN FOUR PROVINCES Dynamics of Growth and Development of Sprout,Effect of Fertilization and Management on the Vegetative Propagation Nursery for Chinese Fir