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Transcript
Soil Conservation • Describe three important benefits that soil provides. • Describe four methods of preventing soil damage and loss. I. The Importance of Soil A. Nutrients Soil provides minerals and other nutrients for plants. All animals get their energy from plants. B. Housing Soil provides a place for animals to live. C. Water Storage Without soil to hold water, plants would not get the moisture or the nutrients they need. II. Soil Damage and Loss A. Overuse Overused soil can lose its nutrients and become infertile. B. Soil Erosion When soil is left unprotected, it can be exposed to erosion. Erosion is the process by which wind, water, or gravity transport soil and sediment from one location to another. III. Contour Plowing and Terracing A. Contour Plowing In contour plowing, the rows of soil act as a series of dams to prevent water from eroding topsoil away. B. Terracing If hills are steep, farmers can using terracing. Terracing changes one steep field into a series of smaller, flatter fields. IV. Cover Crop and Crop Rotation A. Cover Crops Cover crops are crops that are planted between harvests to replace certain nutrients and prevent erosion. Cover crops prevent erosion by providing cover from wind and rain. B. Crop Rotation Farmers can rotate crops that use different nutrients so that nutrients in the soil have time to become replenished.