Environmental Science 1021F/G Study Guide - Final Guide: Emerald Ash Borer, Strip Farming, Agroforestry
26 Apr 2015
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Document Summary
Food and land ii: land degradation is the process by which the land"s future ability to support crops, livestock and wild species are decreased as a result of natural or human processes. 30-40% of the world"s agricultural land has already been degraded, which decreases our sustainable yield. Sustainable yield: the rate at which a resource can be used to ensure that the resource will not become so depleted that it can no longer be used/is non-renewable for future generations. It"s how much you can take of a resource while it can still replenish itself. This has a direct impact on our daily lives and us. Soil erosion, desertification, soil salinization and waterlogging are all examples of land degradation: soil erosion is the movement of soil (the o and a horizon) from one place to another. The soil loses its nutrients and therefore, its fertility. It eventually gets wasted because it goes somewhere that we cannot grow food.
