Topics: Soil management, Water Management, Soil Conservation Techniques, Water Conservation Techniques, Soil Tillage System, soil erosion, Soil Erodility, soil Erosivity

Topics: Soil-site classification, soil sampling, soil master horizon designations, diagnostic subsurface horizons, Identifying horizon boundaries, soil colour, mottling, soil texture, soil structure, Consistence, roots

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 Erosion, soil Conservation, farm, farming systems, husbandry, land use, Soil productivity relation, soil modelling, Agronomic Soil Conservation Measures

Topics: Biology, cellular biology, molecular biology, population biology, branches of biology, botany, cell, ecology, genetics, scientific methods, cell structure, prokaryotic cells, Eukaryotic cells, Eukaryotic plant cells, cell functions, movement, photosynthesis, protein synthesis, cell division, dark reaction, autotroph, heterotroph, parasitism, saprophytism, homeostasis, hereditary, evolution, living things, transport, response, coordination, reflex action, enzymes, hormones, nutrition, digestion, excretion, urine formation, filtration, reabsorption, Tubular secretion, metabolism, respiration, respiratory system, cell chemistry, carbohydrate, parasitism, parasite

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

Topics: grain size, particles, water, air, stress in soil, stress in a layer, Darcy's law, permeability, groundwater flow, flotation, flow net, well, stress strain relations, tangent modulus, one-dimensional compression, analytical solution, numerical solution, consolidation coefficient, creep, sheer strength, triaxial test, shear test, pore pressure, stress path, elastic stresses, deformation, boussinesq, newmark, flamant, layered soil, lateral soil, rankine, coulomb, earth pressure, sheet pile wall, limit analysis, strip footing, prandtl, bearing capacity, infinite slope, slope stability, soil exploration, model test, pile foundations

Topics: soil microclimatology, weather elements, climate, atmospheric dynamics, solar radiation, heat transfer, Atmospheric Moisture, soil moisture, soil properties, soil conservation, Climatic Variables measurement, Evaporation, Evapotranspiration

Topics: Irrigation, Drainage, Soil-water-plant-atmosphere relationship, Irrigation requirement, Consumptive water use, evapotranspiration, Irrigation scheduling, Irrigation resources, irrigation equipment maintenance, Irrigation systems, Irrigation techniques, soil reaction, soil erosion, soil drainage, Soil salinity, soil alkalinity, soil acidity