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

Topics: Soil Fertility, water management, Mineral fertilizer, Phosphate fertilizers, Organic manures, Farmyard manures, compost, sewage, soil sampling, Soil water conservation techniques, erosion control methods

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

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 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: Nigerian peoples, Nigerian culture, Nigerian social structure, tourism, indigene problems, cultism, political history, culture, Islam

Topics: Nigerian Economy, Economic Structure, Economic System, Structural Dualism, Nigerian Agricultural sector, Nigerian Industrial Sector, Mining, Crude Oil Industry, Solid Minerals, Natural Gas, Indigenisation Policy, Structural Adjustment Programmme, National Economic Empowerment and Development Strategy, National Poverty eradication Programme

Topics: Nigerian Economy, Agriculture, Economic Development, mining, quarrying, Government RevenueGovernment Expenditure, Commercial Banking, Central Banking, Nigerian Economic Development, Nigerian External Debt Crisis, International Trade, Structural Adjustment Programme, Nigeria's External Economic Relation, Balance of Payment Disequilibrium, Balance of Payment, Unemployment, Fiscal Federalism, inflation

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: Nigerian Economy, Nigerian Communication Sector, Industrialization, Transport, trade, commerce, Indigenisation Policy, Development Planning, Structural Adjustment Program