logging in or signing up Soil Composition madhavi_23 Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: Embed: Flash iPad Dynamic Copy Does not support media & animations Automatically changes to Flash or non-Flash embed WordPress Embed Customize Embed URL: Copy Thumbnail: Copy The presentation is successfully added In Your Favorites. Views: 1376 Category: Education License: All Rights Reserved Like it (1) Dislike it (0) Added: August 20, 2009 This Presentation is Public Favorites: 1 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript Slide 2: Soil Science Slide 4: Soil is “the unconsolidated mineral or material on the immediate surface of the earth that serves as a natural medium for the growth of land plants.” • Soil is “the unconsolidated mineral or organic matter on the surface of the earth that has been subjected to and influenced by genetic and environmental factors of parent material, climate (including water and temperature effects), macro- and microorganisms, and topography, all acting over a period of time and producing a product—soil—that differs from the material from which it is derived in many physical, chemical, biological, and morphological properties and characteristics.” Slide 5: Soil as an open system Slide 6: Where does soil come from? Rocks Minerals Organic Matter Slide 13: Mollisol Profile Sagebrush-Cold Desert What are the main components of soil? : What are the main components of soil? Mineral Matter Air Water Organic Matter Slide 17: Soil Particles Note: clays are microscopic in size ! Slide 19: Clay minerals photographed with an electron Microscope. Note: they are plate or flake like and are stacked on top of each other. They are electrically charged and act like magnets that attract and hold plant nutrients. Slide 20: Soil should have aggregates! Slide 21: Organic matter is soil gold ! Slide 22: What causes soil erosion? Water Wind No Vegetation Slide 23: My Neighbor has my soil! Slide 24: Rain drop erosion Slide 25: The Great Dust Bowl Wind Erosion Slide 26: The Great Dust Bowl Slide 27: Clouds of Silt Slide 28: Wind Erosion removed topsoil Slide 29: Wind eroded soil Slide 30: Rill Erosion Slide 31: Gully Erosion How did the Canyon Lands of Utah form? Slide 32: Vegetation protects soil Slide 33: Erosion Prayer Slide 35: Our lives depend on preserving our topsoils. Slide 37: Cotton in Furrows Slide 38: What are the FACTORS that make SOIL? TIME 1000’S TO 10,000’S OF YEARS LAY OF THE LAND TOPOGRAPHY LIVING ORGANISMS ANIMALS AND PLANTS CLIMATE HOT/COLD, WIND/RAIN PARENT MATERIAL ROCKS AND MINERALS Slide 39: Topography Physical land features Slide 40: What are some practices Of SOIL CONSERVATION? Terracing Strip Cropping Contour Plowing Tilling Wind Breaks Ground Covers Slide 43: Strip Cropping Contour Plowing Slide 44: Contour Farming Slide 45: Contour Farming Slide 46: Tilling Soil on flat land Slide 47: Furrow Irrigation Slide 48: Minimum Tillage Slide 49: Strip Cropping Slide 50: Strip Crop Farming Slide 51: Soil - We cannot live without it! You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.