PPT-SOIL BEHAVIOUR AND SOIL FORMATION

1 INTRODUCTION Civil and environmental engineering includes the conception analysis design construction operation and maintenance of a diversity of structures facilities and systems All are built on in or with soil or rock The properties and behavior of these materials have major influences on the success economy and safety of the work. They generally are less than 2 inches thick and are massive Crusts are created by the breakdown of structural units by flowing water or raindrops or through freezethaw action Soil crusts are generally only a temporary condition Typically the soil im texturecourtesyNASA: (Getandsample)soilhorizonsmallthesprayLetthebetweenthemoisturethroughout.OncetheStepStep(TestIf the soil: handswhenrubbedandStep themediumribbon The four components of soil:. Decomposed rock. Humus. Air. Water. Soil is the layer of rock and mineral fragments along with organic matter, water and air that supports the growth of plants.. What is Dirt?. Soil is a mixture of. rocks, minerals, decayed. material, water, and air.. Soil is one of Earth’s most valuable natural resources. . Everything . that lives on the land, including humans depends on soil.. Soils. We know more about the movement of celestial bodies than about the soil underfoot. . - Leonardo da Vinci. Soil: Definition. Solid earth material that has been altered by physical, chemical and organic processes so that it can support rooted plant life.. Chapter 7 . Section 2 Notes. Fact Finders. Use your textbook, pages 188 - 194, to fill in the blanks.. _______ is a mixture of weathered rock, decayed organic matter, mineral fragments, water & air.. S6E5h. Describe soil as consisting of weathered rocks and decomposed organic material. What is soil?. Key terms:. Soil—the loose, weathered material on Earth’s surface in which plants can grow.. What is soil?. Uppermost layer of earth’s crust that supports plants, animals and microbes. Soil Forming Factors. Parent Material. Time. Climate. Vegetation & Organisms. Topography. 1. Parent Material. Refers to the rock and minerals from which the soil derives.. 1are people on the earthMillions of species and billions of organisms151bacteria algae microscopic insects -tion of biomass anywhere on the planet Microbes which make up only one half of one percent o The soil is the upper layers of the . regolith. that is accumulated materials of weathering product and thus supports plant growth. . Weathering Products. : . Product of weathering is . regolith. or . Success criteria:. I can draw a soil diagram.. I can explain the formation of a . podzol. .. I can answer in fully developed points. . Starter. Heading: . Podzol. Draw this diagram in the middle of your page.. Figure 3-24. Fig. 3-24a, p. 69. Mosaic of closely packed pebbles, boulders. Weak humus-mineral mixture. Dry, brown to reddish-brown with variable accumulations of clay, calcium and carbonate, and soluble salts. Diana . Jordanova. and Neli . Jordanova. National Institute of Geophysics, Geodesy and Geography, Bulgarian Academy of Sciences, Acad. G. . Bonchev. str., block 3, 1113 Sofia, BULGARIA. diana_jordanova77@abv.bg. areas. : . facts. , . issues. , and . perspectives. Caring. . for. . Soil. – . Where. . Our. . Roots. . Grow. Outline. :. ->. Definitions. (focus on water . erosion. ). ->. Facts. /. examples.