PPT-Soil Types

Classification and Testing Understanding what type of soil is present is important because it determines what type of plant will be most suited to an area This can accurately predict yields of crops for agriculture . – Properties, nature, types and significance SOIL COLLOIDS The colloidal state refers to a two - phase system in which one material in a very finely divided state is dispersed through second p Colin Pettinati. Winter Ecology . Mountain Research Station 2014. University of Colorado, Boulder. Factors Controlling soil pH. Parent Material. Precipitation (moisture). Native Vegetation. Crops grown. agricultural colonization. ereafter the soil prop - erties were altered due to deforestation, addition of manure or deliberate fertilization ( M 2004) and tillage of topsoil horizons having Soil – all unconsolidated material in the earth’s crust. Soil includes –. Mineral particles – sand and clay. Organic Materials – found in topsoil and marsh. Air. Water. Mineral Soils. Result from weathering of rock that forms the solid crust of the earth. Definitions. Soil Texture. The way a soil feels. A name given a textural group based on the relative proportions of each size of soil particle. Definitions. Aggregate. Mass or cluster of soil particles such as a clod, crumb or granule. A. Explain the nature and composition of soil;. Soil is the outer layer of the earth. Dirt is displaced Soil. Composition of average soil . a. 25% Air. . b. 25% Water. . c. 5% Organic Matter. . d. 45% Mineral Matter. 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.. By: Group 4-A. Description of the environment . The place we got the soil from was very hot and sunny. We couldn't find any vegetation there. The ground was very hard, rocky, dusty, sandy, and bumpy. As we dug deeper the soil became darker. The color of the ground was light brown in some parts and it was dark brown in others. . Objectives. Identify the . v. arious roles of plants in everyday . l. ife. ;. Identify the various segments of plant and soil science. ; and . Identify important types of plants and their uses. .. Roles of Plants in . Any disintegrated . surface . material, . natural or artificial that lies on or near the Earth’s surface. .. Natural= rocks, minerals, vegetation, animal . matter. Manufactured= glass, paint, asphalt, brick fragments, cinders. 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 . the branch of engineering science which . enables . an engineer to know theoretically or experimentally the . behavior . of soil under the action of . ;. Loads (static or dynamic), . Gravitational forces, . 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. Experimental Approach . Results - Field Research . Gladys De La Rosa, Chu-Lin Cheng, James J. Kang, Engil Pereira . School of Earth, Environment, and Marine Sciences, The University of Texas Rio Grande Valley, Edinburg TX..