logging in or signing up Soil Science kmcgurgan 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: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 1313 Category: Entertainment License: All Rights Reserved Like it (0) Dislike it (0) Added: February 21, 2009 This Presentation is Public Favorites: 1 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript Chapter 1 : Chapter 1 The Importance of Soil Influence on Human History : Influence on Human History Life and human civilization depend on the planet’s limited soil and water resources. Early Civilizations : Early Civilizations Chinese Developed along floodplains of the Yellow River Mideast (Egypt) Farming developed along major rivers (the Nile) North America Part of success stands on rich soil and water resources Cycling of Atmosphere, Crust, and Soil : Cycling of Atmosphere, Crust, and Soil Three-Phase Soil System : Three-Phase Soil System Solid particles Pore spaces Liquids (water) Agricultural Uses of Soil : Agricultural Uses of Soil Cropland Grazing land Forest Other uses Nursery stock Landscaping Nonagricultural Uses : Nonagricultural Uses Recreation Engineering Waste disposal Building materials Land Use in the United States : Land Use in the United States About 80% of non-federal land is evenly divided between crop, forest, and rangelands. One land use that continues to grow — urbanization. Soil Quality : Soil Quality Also called soil health Defined as the capacity of a specific soil to provide the needed functions for human or natural ecosystems over the long term. Soil Degradation : Soil Degradation Soil degradation is the loss of soil quality. Examples include: Erosion Pollution Desertification Changes in soil chemistry Salinization Loss of organic matter Best Management Practices (BMP) : Best Management Practices (BMP) Preserving soil quality by understanding basic soil process and management Includes specific practical and profitable practices that preserve soil and natural resources Soil in Nature : Soil in Nature Plays a critical role in natural ecosystems Determines which livings things reside where by availability of such resources as moisture and nutrients, as well as temperature Soil and Climate : Soil and Climate Soils interact with the atmosphere by gas exchange. When we manage soil, we can increase or decrease the concentration of greenhouse gases in the atmosphere, thus affecting the degree of climate change. Soil and Carbon : Soil and Carbon Organic matter in soil is one of the planet’s largest reservoirs of carbon. When organic matter is lost from fields, more CO2 goes into the atmosphere. Carbon sequestration is the process of storing carbon in soils, plants, or elsewhere. Carbon sinks are the locations where carbon is sequestered. Summary : Summary Soil serves ecological functions that support life. Soil supplies anchorage, water, and nutrients to the plant and oxygen to the roots. People inhabit the soil surface and have both agricultural and nonagricultural uses for soil. You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.
Soil Science kmcgurgan 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: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 1313 Category: Entertainment License: All Rights Reserved Like it (0) Dislike it (0) Added: February 21, 2009 This Presentation is Public Favorites: 1 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript Chapter 1 : Chapter 1 The Importance of Soil Influence on Human History : Influence on Human History Life and human civilization depend on the planet’s limited soil and water resources. Early Civilizations : Early Civilizations Chinese Developed along floodplains of the Yellow River Mideast (Egypt) Farming developed along major rivers (the Nile) North America Part of success stands on rich soil and water resources Cycling of Atmosphere, Crust, and Soil : Cycling of Atmosphere, Crust, and Soil Three-Phase Soil System : Three-Phase Soil System Solid particles Pore spaces Liquids (water) Agricultural Uses of Soil : Agricultural Uses of Soil Cropland Grazing land Forest Other uses Nursery stock Landscaping Nonagricultural Uses : Nonagricultural Uses Recreation Engineering Waste disposal Building materials Land Use in the United States : Land Use in the United States About 80% of non-federal land is evenly divided between crop, forest, and rangelands. One land use that continues to grow — urbanization. Soil Quality : Soil Quality Also called soil health Defined as the capacity of a specific soil to provide the needed functions for human or natural ecosystems over the long term. Soil Degradation : Soil Degradation Soil degradation is the loss of soil quality. Examples include: Erosion Pollution Desertification Changes in soil chemistry Salinization Loss of organic matter Best Management Practices (BMP) : Best Management Practices (BMP) Preserving soil quality by understanding basic soil process and management Includes specific practical and profitable practices that preserve soil and natural resources Soil in Nature : Soil in Nature Plays a critical role in natural ecosystems Determines which livings things reside where by availability of such resources as moisture and nutrients, as well as temperature Soil and Climate : Soil and Climate Soils interact with the atmosphere by gas exchange. When we manage soil, we can increase or decrease the concentration of greenhouse gases in the atmosphere, thus affecting the degree of climate change. Soil and Carbon : Soil and Carbon Organic matter in soil is one of the planet’s largest reservoirs of carbon. When organic matter is lost from fields, more CO2 goes into the atmosphere. Carbon sequestration is the process of storing carbon in soils, plants, or elsewhere. Carbon sinks are the locations where carbon is sequestered. Summary : Summary Soil serves ecological functions that support life. Soil supplies anchorage, water, and nutrients to the plant and oxygen to the roots. People inhabit the soil surface and have both agricultural and nonagricultural uses for soil.