Mycorrhizal fungi Mycorrhizas 7 Soil Biology 6 Endomycorrhizas 4 Microbial Ecology, (New March 2000) 4 Rhizosphere 4 Soil microbiology 4 Vesicular arbuscular mycorrhizas 4 Dissertations, Academic (Ph.D) 3 Fungi 3 Genetics and Molecular Biology of Microorganisms, (New March 2000) 3 Plant diseases 3 Plant pathogens 3 Thesis (Ph.D)-Botany 3 Biological Resources (Plant) 2 Ectomycorrhizas 2 Enzyme activity 2 Forest soils 2 Forests and Forest Trees (Biology and Ecology) 2 Fungal diseases of plants 2 Grasslands and Rangelands 2 Horticultural Crops, (New March 2000) 2 Microbial ecology 2 Molecular Biology and Molecular Genetics, (Discontinued March 2000, Reinstated and Revised June 2002) 2 Nitrogen fixation 2 Nitrogen fixing bacteria 2 Nodulation 2 Plant pathogenic fungi 2 Plants 2 Savanna soils 2