Effects of Nitrogen Fertilization on VA Mycorrhizal Fungal Colonization and Root Morphology of the First Order Roots in Fraxinus mandshurica Plantation in Response to the colonization EFFECTS OF WATER STRESS AND VA MYCORRHIZAL FUNGI ON THE GROWTH OF MUNGBEAN CONTRIBUTION OF SOIL 32 P, FERTILIZER 32 P AND VA MYCORRHIZAL FUNGI TO PHOSPHORUS NUTRITION OF CORN PLANT Identification of Ginkgo VA Mycorrhizal Fungi in Zhejiang Province Resources and Distribution of VAM Fungus Communities in Eucalyptus Forest in Southern China VA Mycorrhizal Fungi in the Rhizosphere Soil of Tropical and Subtropical Pteridophytes in Yunnan VA Mycorrhizal Fungi Infecting Plants in Saline-alkali Soil of Gansu Variation between Mycorrhizal Dependency of Different Crops Population Composition and Seasonal Variation of VA Mycorrhizal Fungi Spores in the Rhizosphere Soil of Four Pteridophytes