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: speed, velocity, acceleration, linear expansivity, electrical energy, power, scalar, vector, projectiles, equilibrium of forces, linear momentum, gas laws, waves, light waves, reflection, sound waves, gravitational field, electric field, static electricity, current electricity, electrolysis, magnetic fields, electromagnetic fields, energy quantization, wave-particle paradox, radioactivity, nuclear reaction

Topics: scientific method, hypothesis, chemical industries, matter, atom, molecule, ion, neutral atom, atomicity, Dalton‘s atomic theory, atomic structure, atomic number, mass number, isotopy, valency, binary compounds, chemical combination, periodic table, electronic configuration, noble gases, Relative atomic mass, Relative molecular mass, chemical bonding, Electrovalent bonding, covalent bonding, Co-ordinate covalent bonding, Metallic bonding, hydrogen bonding, Vander Waal forces, Gas Laws, Boyle‘s law, Charles law, Avogadro's law, Separation Techniques, filtration, decantation, acid, bases, salts, alkali, water, carbon, diamond graphite, Chemical Reactions, Reactants, decomposition reaction, Acid-Base Reaction, Volumetric analysis, reagents, water, air, oxygen, halogen, nitrogen, Sulphur, Oxidation Reduction Reaction, redox reaction, oxidizing agent, reducing agent, ionic theory, Electrovalent Compounds, Covalent Compounds, Electrolysis, Electrochemical cells, organic chemistry, isomerism, alkanols, Quantitative Analysis, Qualitative Analysis, Acid-base titration, Redox titrations, Petroleum, metals, fats, oil, starch, Giant Molecules, sugar, protein, nuclear chemistry, Nuclear Reactions

Topics: Western education, indigenous African education, Nursery education primary education, secondary education, vocational education, Arabic education, Islamic education, nomadic education, special education, post-secondary education, higher education, Universal basic education, Public examination institutions, Nigerian educational system, New secondary school curriculum

Topics: Inorganic chemistry, atomic structure, atomic orbitals, molecular structure, bonding, Lewis structure, valence bond theory, Molecular orbital theory, ionic solids, ionic bonding, semiconduction, acid, base, Brønsted acidity, Lewis acidity, oxidation, reduction, reduction potentials, redox stability, Molecular symmetry, isomerism, coordination compounds, chirality, spectroscopy, chemical analysis, Magnetometry, periodic trends, Group 1 elements, Group 2 elements, hydrogen, Group 13 elements, Group 15 elements, Group 14 elements, Group 16 elements, d-Block elements, Representative compounds, Electronic spectra, Magnetism, Coordination chemistry, Ligand substitution reactions, Ligand substitution, Redox reactions, Photochemical reactions, Lanthanoid chemistry, Actinoid chemistry, ligands, Solid-state chemistry, materials chemistry, Metal oxides, nitrides, fluorides, Chalcogenides, intercalation compounds, Hydrides, inorganic pigments, Semiconductor chemistry, Molecular materials, fullerides, catalysis, Homogeneous catalysis, Heterogeneous catalysis, Hybrid catalysis, Characterization, fabrication, Nanomaterials, nanoscience, nanotechnology, Self-assembled nanostructures, Bioinorganic nanomaterials, Biological inorganic chemistry, Catalytic processes, Biological cycles, Chelation therapy, nitrogen cycle, hydrogen cycle, acid-base catalysis, Tethered catalysts, Electrocatalysis, Alkene polymerization, Ammonia synthesis, Hydroformylation, Alkene metathesis

Topics: Soil Tests analysis Laboratory Guide, Plant Analysis Laboratory Guide, soil analysis, soil testing, Sample Aliquot Determination, Soil pH, Soil Storage, Soil Buffer pH, Adams–Evans Buffer, Mehlich Buffer, Titratable Acidity, Exchangeable Acidity, Liming Materials, Extractable Phosphorus, Olsen’s Sodium Bicarbonate, Ammonium Bicarbonate–DTPA, Plasma Emission Spectrometry, UV-VIS Spectrophotometry, Cation Determination, Micronutrients, Trace Heavy Metals, Extractable Nitrate–Nitrogen, Extractable Sulfate–Sulfur, Monocalcium Phosphate, Humic Matter Content Determinations, Wet Digestion, Soluble Salt Determination, Soil Texture, plant analysis, Sample Preparation, Petioles, Decontamination, Tissue Testing, Nitrate–Nitrogen Test, Nitrate–Nitrogen Stalk Test, Instrumental Analysis, Emission Spectrophotometry, Flame Emission Spectrophotometry, Atomic Absorption Spectrophotometry, Inductively Coupled Plasma Emission Spectrometry

Topics: Soil Fertility, Fertilizers, global population growth, food consumption, food production, agricultural land use, crop yields, nutrient use, Crop Yield Limiting Factors, buffering capacity, mineral solubility, soil acidity, soil alkalinity, Soil pH Buffering, Reducing Soil Acidity Effects, Calcareous Soils, Saline Soils, Sodic Soils, Saline-Sodic Soils, nitrogen, Biological Fixation, Phosphorus, Phosphorus cycle, soil Phosphorus forms, Phosphorus sources, Potassium cycle, soil Potassium forms, Potassium sources, Sulfur, Calcium, Magnesium, Micronutrients, iron, zinc, coper, Manganese, Boron, chloride, Molybdenum, Nickel, Beneficial Elements, soil fertility evaluation, plant nutrient-deficiency symptoms, plant analysis, greenhouse tests, soil testing, nutrient management, soil characteristics, nutrient placement, Nutrient Interactions, nutrient Economics, Agricultural Productivity, Environmental Quality

Topics: CONJUNCTIVA, OCULAR EXAMINATION, SCLERA, OPTICS, cornea, UVEAL TRACT, orbit, lacrimal apparatus, lymph nodes, eye lid, eye lashes, globe, lens, retina, vitreous, blurred optic disc margin, glaucoma, pupils, strabismus, pediatric Ophthalmology, ocular trauma, NEURO-OPHTHALMOLOGY, OCULAR EMERGENCIES, INTRAOCULAR MALIGNANCIES, OCULAR TOXICITY, Pinguecula, Pterygium, Subconjuctival Hemorrhage, Conjunctivitis, Bacterial Conjunctivitis, Viral Conjunctivitis, Chlamydia Conjunctivitis, Allergic Conjuctivitis, Giant Papillary Conjunctivitis, Vernal Conjunctivitis, Vision Assessment, Anterior Chamber Depth, pupils, Extraocular Muscles, Slit-Lamp Examination, Tonometry, Ophthalmoscopy, Fundoscopy, Episcleritis, Scleritis, Scleromalacia Perforans, Blue Sclerae, Staphyloma, Emmetropia, Refractive Errors, myopia, hyperopia, astigmatism, Presbyopia, Anisometropia, Refractive Eye Surgery, Corneal Abrasion, Recurrent Erosions, Corneal Ulcers, Herpes Simplex Keratitis, Herpes Zoster, Keratoconus, Arcus Senilis, Kayser-Fleischer Rings, Exophthalmos, Proptosis, Enophthalmos, Preseptal Cellulitis, Orbital Cellulitis, Keratoconjunctivitis Sicca, Dacryocystitis, Dacryoadenitis, Epiphora, Lid Swelling, Trichiasis, Entropion, Ectropion, Hordeolum, Chalazion, Blepharitis, Xanthelasma, Lid Carcinoma, Uveitis, Endophthalmitis, Cataract, Dislocated Lens, Vitreous Hemorrhage, Central Retinal Artery Occlusion, Branch Retinal Artery Occlusion, retina, Central Retinal Vein Occlusion, Retinal Detachment, Retinitis Pigmentosa, Roth Spots, Age-Related Macular Degeneration, Myelinated Nerve Fibres, drusen, Primary Open Angle Glaucoma, Primary Angle Closure Glaucoma, Secondary Open Angle Glaucoma, Secondary Angle Closure Glaucoma, Normal Pressure Glaucoma, Congenital Glaucoma, Tropia, phoria, Paralytic Strabismus, non-Paralytic Strabismus, Leukocoria, Nasolacrimal System Defects, Ophthalmia Neonatorum, rubella, blunt trauma, Penetrating Trauma, Hyphema, Blow Out Fractures, Sympathetic Ophthalmia, Visual Field Defects, Bitemporal Hemianopsia, Homonymous Hemianopsia, Internuclear Ophthalmoplegia, Nystagmus

Topics: Glaucomatous Optic Neuropathy, Primary glaucomas, Secondary glaucomas, Childhood glaucomas, Secondary congenital glaucoma, Schiotz tonometer, GONIOSCOPY, antiglaucoma drugs

Topics: recording media, paper materials, Modern Paper Making, paper making, Paper Deterioration, Paper Deterioration agents, paper Preservation, paper conservation, Disaster Prevention, De-acidification, Acidity Test, Preventive Conservation, cleaning methods