Topics: Soil microbiology, Soil Biochemistry, Nitrogen Cycle, Rhizosphere Microbes, Phosphorus Cycle, Biological Nitrogen Fixation, Mycorrhiza, organic matter, animal wastes, sewage materials, Petroleum Hydrocarbons, Detergents in Soils, Pesticides in Soils, bacteria, Archaea

Topics: Soil Analytical Techniques, Analytical Laboratory, Quality Assurance Control, Precision, Accuracy, Laboratory Chemicals, soil sampling, plant sampling, Nitrogen Determination, Phosphorus Determination, Potassium Determination, Colorimeter, Flame Photometer, Atomic Absorption Spectrophotometer

Topics: Land reclamation, soil degradation, soil pollution, water erosion, wind erosion, acidification, soil salinization, soil solidification, waste, climate change, deforestation, desertification, Land Reclamation Technologies, Soil compaction, splash erosion, sheet erosion, Gully Erosion, Landslides

Topics: soil habitat, Microorganism, bacteria, nitrogen fixer, disease suppressor

Topics: soil microorganism, carbon cycle, cellulose decomposition, hemicellulose decomposition, lignin decomposition, nitrogen cycle, nitrogen fixation, Nitrogen fixing bacteria, nitrification, denitrification

Topics: Soil microorganisms, carbon cycle, cellulose decomposition, hemicellulose decomposition, lignin decomposition, nitrogen cycle, ammonification, nitrogen fixation, Free-living nitrogen fixing-bacteria, symbiotic Nitrogen-fixing bacteria, proteolysis, nitrification, denitrification

Topics: Principles of Soil Science

Topics: Cataloguing, Library materials, knowledge organization, descriptive cataloguing, Anglo-American cataloguing rules, library of congress subject headings, sears list of subject headings, dewey decimal classification scheme, filing, shelving

Topics: types of law, natural law, divine law, eternal law, classification of law, common law, equity, civil law, criminal law, public law, private law, substantive law, procedural law, written law, unwritten law, legal language

Topics: plant classification, non-vascular plants, vascular plants, cryptogams, phanerogams, algae, fungi, Bacteriophage, bacteria, bryophytes, Mosses, Musci, Hornwort, Anthocerotae, pteridophytes, Biological life cycle, Gymnosperm, Angiosperm