Topics: set, set theory, inequality, integration, differentiation, matrix algebra, frequency distribution, probability theory, correlation analysis, regression analysis

Topics: Probiotics, Antibiotics, vaccines, Antibiotics production, biopesticides, Biofertilizers, nitrogen fixers, Phosphate solubilizers

Topics: Land Tenure, crop classes, Tropical Agricultural Systems, Crop Production, crop propagation, Animal Husbandry, farm animals classes, Farm Animals distribution, Livestock Management Systems, Livestock Management, Fisheries, Fish Production, Aquaculture, Sustainable Forest Management, Wildlife, Wildlife Management, Ecotourism

Topics: Understanding Technological Change, Technological Change, Agricultural Extension, Agricultural Engineers, Public Extension System, social change, innovation

Topics: Gender, gender framework, gender theories, Gender access to credit facilities, Gender roles in agricultural labour, Gender access to appropriate technology, Gender issues in rural travel and transport, culture, social class, social mobility, rural-urban dichotomy

Topics: Criminology, Security Studies, Climate of Nigeria, Drainage of Nigeria, Population Migration, Rural Settlements, Urban Settlements, mining, fishing, animal husbandry, food crop agriculture, export crop agriculture, irrigated agriculture, modern manufacturing, internal trade, rail transport, road transport

Topics: soil properties, soil management, tropical environment, temperature, solar radiation, rainfall, tropical climates, vegetation, physiography, Anthropocene, biodiversity, climate change, demographics, Green Revolutions, Tropical Agroecosystems, land use, land-use change, Pedology, Physics, Chemistry, Biology, Laterite Paradigm, tropical soils, tropical soil research, Soil Taxonomy, soil classification systems, soil physical properties, soil temperature, soil structure, soil compaction, soil water, soil erosion, conservation, conservation agriculture, water, rainfed agriculture, irrigated agriculture, irrigation, mineralogy, clay minerals, mineralogy families, Anion Exchange Capacity, soil acidity capacity, Acid Soil Infertility, Liming, overliming, subsoil acidity, secondary acidity, soil biology, soil biodiversity, comminution, decomposition, nutrient elements transformation, soil structure regulation, organic carbon, carbon pools, carbon fractions, animal manures, composts, biochars, organic farming, soil fertility, nutrient cycling, nutrient uptake, determining fertilizer needs, nitrogen cycle, nitrogen pools, atmospheric deposition, biological nitrogen fixation, mineral fertilizers, organic nitrogen mineralization, soil nitrogen fertilizer reactions, Phosphorus Cycle, Phosphorus, Total Soil Phosphorus, inorganic Phosphorus, Phosphorus sorption, Phosphorus release, plant Phosphorus requirements, Phosphorus fertilization, sulfur cycle, sulfur sorption, Sulphur fertilization, Forest–Soil Nutrient Cycles, land clearing, Mechanized Land Clearing, Crop Yield Declines, Field Abandonment, Secondary Forest Fallows, puddling, flooding, rice cultivation systems, Nutrient Management, Yield Stagnation, Nitrogen Sequestration, Livestock-Based Tropical Systems, tropical pastures, Tropical Livestock Management Systems, pastoralism, Smallholder Mixed Crop–Livestock Systems, Extensive Pasture-Based Beef Production, Pasture Degradation, Crop–Pasture Integration, Tropical Tree-Based Systems, Plantation Forestry, Plantation Forestry Species, Agroforestry, Agroforestry Tree Species, Agroforestry Systems, Simultaneous Agroforestry, Sequential Agroforestry, tree crops

Topics: Nigerian Economy, Economic, Growth, Nigeria, Nigerian Agriculture, Agriculture, Economic Development of Nigeria, Food, Cash Crops, Employment, Export, Foreign Exchange, Problems, Agricultural Sector, Infrastructure, Facilities, Skill Development, Agricultural Policy, Programmes, Broad Policy Objectives, Agricultural Commodity, Marketing, Input Supply, Distribution Policy, Agricultural Input, Policy, Research, Development, Nigeria GDP, Import Substitution, Export Promotion, Local Resource-Based, Incentives, Industrialisation, Tax, Tariff Protection, Import Duty Relief, Total Ban, f Supportive Activities, Loan, Depreciation Allowance, Government Participation, Approved User Scheme, Export Incentives, Manufacturing, Performance, Structural Changes, Average Capacity Utilization., Mining, Quarrying, Associated Natural Gas, ANG, Oil, Petroleum, Dutch Disease, Spending Effect, Communications, Education, International Trade, Balance of Payment

Topics: vegetation, tropical forests, climate, soils, floristic diversity, floral biology, flower development, pollination, fruit, seed production, microclimate, seeding patterns, forest productivity, tropical savannas, arid regions, Mediterranean ecosystems, temperate forest ecosystems, temperate grasslands, coniferous forests, terrestrial wetlands, freshwater ecosystems, coastal ecosystems, coral reefs, coastal vegetation

Topics: forest habitat, Tropical forest, Temperate forest, Boreal forest, Taiga forest, Grassland Habitat, Dessert Habitat, Adaptation