Topics: Pasture, pasture establishment, pasture utilization, forage yield determination, forage conservation, pasture nutritive value, grass morphology, legumes, shrubs, Nigerian vegetation zone, rainforest, guinea savanna, Sudan Savanna, Mangrove zone, plant introduction, Soil fertility, Seedbed Preparation, conventional tillage, no-till seedbed, seeding rate, weed control, forest grazing

Topics: ecosystem, populations, population growth, predation, symbiosis, community stability, nutrition circulation, allelochemics, soil development, soil classification, vegetation, watersheds, biogeochemistry, pollution, radioisotope contamination, pesticides, heavy metals, air pollution, lake production, eutrophication, retrogression, community evolution, human ecology, marine productivity, detritus, biosphere

Topics: Soil microbiology, soil habitats, lithosphere, bacteria, Nitrogen fixers, disease suppressors

Topics: Natural Environment, Animal Production, earth science, environment, geological activity, oceans, rivers, streams, lakes, ponds, climate change, atmosphere, atmospheric layers, global warming, climate, weather, life ecosystems, biomes, biogeochemical cycles, wilderness, Environmental degradation, population growth, agriculture, water management, greenhouse gas emission, Gas effect, emissions, pollution, air pollution, water pollution, land pollution, erosion, coastal erosion, glaciers, floods, freezing, thawing, wind erosion, gravitational erosion, exfoliation, soil structure, soil composition, vegetation cover, topography, agricultural practices, deforestation, urbanization, airborne dust pollution, desertification, Stratospheric Ozone, ozone hole, Antarctica Ozone Theory

Topics: biological diversity, ecosystem, Nigerian Ecosystem, Biodiversity, genetic erosion, Plant Biotechnology, Forest Biotechnology, forest Conservation, Germplasm Appropriation, Germplasm Conservations, Bio-resource Management, Biotechnological Legislation

Topics: soil water, Salinity, temperature, pH, Radiation, pollution, Benthic region, marine bacteria, Tundra soils, Salt lakes, extreme aquatic environments, Glaciers

Topics: mechanics, measurement, space, time, units, dimension, kinematics, laws of mechanics, statics, dynamics, work, energy, conservation laws

Topics: Microbiology, Microbial Structure, Microscopy, Specimen Preparation, Prokaryotic Cell, Eukaryotic Cell, Microbial Nutrition, Microbial Growth, Metabolism, Energy, Enzymes, Energy Release, energy Conservation, microbial molecular biology, genetics, genes, gene replication, gene mutation, gene expression, gene regulation, microbial recombination, microbial plasmids, DNA technology, genomics, Recombinant DNA Technology, microbial genomics, viruses, Bacteriophages, Microbial Taxonomy, archaea, Deinococci, Nonproteobacteria Gram Negatives, Proteobacteria, Fungi, Eumycota, Slime Molds, Water Molds. algae, protozoa, ecology, symbiosis, Normal Microbiota Resistance, Nonspecific Host Resistance, Specific Immunity, Medical Immunology, Antimicrobial Chemotherapy, Clinical Microbiology, microbial diseases, food microbiology, industrial microbiology, Biotechnology

Topics: measurement, estimating, motion, kinematics, dynamics, friction, circular motion, drag forces, gravitation, Newton's synthesis, work, energy, conservation of energy, linear momentum, rotational motion, angular momentum, static equilibrium, elasticity, fracture, fluids, oscillators, wave motion, sound, temperature, thermal expansion, ideal gas law, kinetic theory of gases, thermodynamics, electric charge, electric field, Gauss law, electric potential, capacitance, dielectrics, electric energy storage, electric currents, resistance, DC circuits, magnetism, magnetic field sources, electromagnetic induction, inductance, electromagnetic oscillations, AC circuits, Maxwell's equations, electromagnetic waves, light, reflection, refraction, lenses, optical instruments, wave nature of light, diffraction, polarization, quantum theory, quantum mechanics, molecules, solids, nuclear physics, radioactivity, nuclear energy, elementary particles

Topics: Force, Parallelogram Law, Lami’ s theorem, Polygon of forces, Moment of force, couple, friction, work, energy, power, kinetic energy, potential energy, conservation of energy, simple harmonic motion