Soil microbial ecology Agricultural ecology 1 Animal Ecology 1 Biodegradation 1 Biological activity in soil 1 Decomposition 1 Food webs 1 Microbial Ecology, (New March 2000) 1 Microbial degradation 1 Mineralization 1 Nitrogen-Fixation 1 Protozoa 1 Rhizobium 1 Saprophytes 1 Soil Biology 1 Soil Chemistry and Mineralogy 1 Soil bacteria 1 Soil biology 1 Soil ecology 1 Soil fauna 1 Soil flora 1 Soil fungi 1 Soil invertebrates 1 Soil mineralogy 1 Soil organic matter 1 Soils-Organic compound content 1 Species diversity 1 Trophic levels 1