Rhizobium Azolla 2 Microbiology 2 Azospirillum 1 Biogas slurry 1 Biopesticides 1 Composting 1 Green Manuring 1 Legumes 1 Mycorrhiza 1 Nitrogen 1 Nitrogen-Fixation 1 Nitrogen-fixing plants 1 Organic Matter 1 Plant-microbe relationships 1 Plants 1 Salt affected soils 1 Soil colloids 1 Soil microbial ecology 1 Soil sampling for microbiological analysis 1 Sulphur oxidation in soil 1 vermicomposting compost 1