- 1. Study of the status of a soil with respect to the forms, amount available nutrient elements necessary for plant growth.
- 2. Deal with characteristics, properties reactions of a soil which are caused by physical forces and which can be described by equations.
- 3. A thin portion of the earth's crust which is a mixture of organic and inorganic materials formed from the weathering or rock and minerals.
- 4. Layers of soil that are almost parallel to the surface with distinct range of properties which different from other layers.
- 5. A approach considered soil as natural entity, a biochemically weathered and synthesized product of nature.
- 6. A approach conceives of the soil as natural habitat of plant, it considered the various properties of soils as they relate to plant growth and production.
- 7. Naturally occurring chemical element or compound formed as a product of inorganic processes.
- 8. Minerals formed at temperatures and/or pressure higher than that normally encountered at the earth's surface.
- 9. Mineral form under conditions of temperature and pressure found at the earth's surface by weathering of preexisting minerals.
- 10. A process whereby rocks on exposure to the weather change in character, decay and crumble in soil by chemical or physical forces.
- 11. Rocks are broken down into small pieces without undergoing any change in chemical composition.
- 12. It occurs when some forces causes two surface to come together causing grinding of their surfaces.
- 13. Thin flakes and curve scales pales off the exposed rock surfaces.
- 14. Low temperature cause water to freeze and expand by about 10% at its volume. If water seeps into crack on rocks and then freeze.
- 15. Root pry is one of the methods of mechanical/ physical weathering. Tree and plant root dig deep into into small cracks and crevices.
- 16. Weathering by growth of salts upwards take place in desert where evaporation of ground water containing dissolved salts upwards into the pores of the rocks.
- 17. Addition of materials from the soil body.
- 18. Hydrologic addition of particles in the surface.
- 19. Darkening of light colored mineral through the mixture of organic matter.
- 20. Accumulation of organic matter in the soil surface.
- 21. Washing out of eluviating material from the solum.
- 22. Removal of soil material from the surface.
- 23. Movement of material out of a portion of a soil profile.
- 24. Movement of material into a portion of a soil profile
- 25. Reaction that removes CaCo3 from 1 or more horizon.
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