Rhizosphere Mycorrhizal fungi 4 Soil Biology 4 Mycorrhizas 3 Soil fertility 3 Soil microbiology 3 Genetics and Molecular Biology of Microorganisms, (New March 2000) 2 Microbial Ecology, (New March 2000) 2 Microbial ecology 2 Nitrogen fixation 2 Nodulation 2 Nutrient availability 2 Soil Chemistry and Mineralogy 2 Soil Fertility 2 Soil fauna 2 Soil management 2 Soil organic matter 2 Vesicular arbuscular mycorrhizas 2 Actinomycetales-Population-Kerala 1 Aerobiology 1 Agricultural microbiology 1 Agricultural soils 1 Agroforestry 1 Agroforestry and Multipurpose Trees: Community, Farm and Social Forestry 1 Agroforestry systems 1 Aquatic Environments 1 Azobacter 1 Biochemistry and Physiology of Microorganisms, (New March 2000) 1 Biodegradation 1 Biogeochemistry 1