Topics: Nigerian History, History, Benin Civilization, NOK Civilization, Ife Civilization, Igbo Ukwu Civilization, Oyo Empire, Trans Saharan Trade, Atlantic Slave Trade, INDIRECT RULE SYSTEM, COLONIAL ECONOMY, DECOLONIZATION PROCESS IN NIGERIA

Topics: soil, soil water, soil plant water relationship, irrigation, drainage

Topics: Soil Ecosystem, Microbial Ecology, soil ecosystem development, Soil Food Web, Biogeochemistry, Nutrient Cycling, Carbon cycling, Nitrogen Cycling, Plant Roots, Rhizosphere

Topics: European Civilization, Carolingian Empire, Germanic kingdom, Frankish empire, Medieval Papacy, feudalism, Capetian Dynasty, russian empires, Hohenstaufen Dynasty, Saxon dynasty, Cathedrals, crusade, Medieval Society, Age of Chivalry, Knighthood, Code of Chivalry, Renaissance Literature, Renaissance Learning, Renaissance Art, Anguissola, Gentileschi, Age of Discovery

Topics: French culture, French civilization, Géographie de la France, Histoire de la France, Les changements sociaux en France, Le découpage territorial de la France, La vie politique en France, La notion de droits et de la Liberté en France, Le système éducatif français, La vie économique en France, Langue françaises, culture françaises, Le système de transport en France, Le Tourisme en France, Le syndicalisme en France, La politique française en Afrique, La Francophonie, Les massifs, Les plaines, Les fleuves, Le relief de la France métropolitain, Les saisons, Les climats, Le peuple français, La langue française, La révolution française

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 resources, soil composition, soil properties, soil classification systems, Earth Natural Resources, land use, land cover change, Microorganisms interaction, organic materials interaction, inorganic materials interaction, Fertiliser effects, Pesticides effects, herbicides effect, Environmental Impact Assessment, Environmental Impact Assessment Processes, acid rain, Acid rain effects, Soil Organic Matter, Soil Living Organisms

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: 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