degradation

**Degradation**


 * Six categories of soil degradation classifications
 * 1. **Types** of soil degradation (such as water erosion, chemical deterioration, etc.)

> 3. **Extent** of soil degradation (as a percentage of the mapping area affected) > 4. **Rate** of soil degradation [from +3 (rapidly increasing) to -3 (rapidly decreasing)] > 5. **Causative factors** (five classes, such as improper management of cultivated land, overgrazing, etc.) > 6. Rehabilitation or **protective measures** (four classes, such as plant management, land management, etc.) >
 * 2. **Degree** of degradation, expressed as the impact on productivity (five classes from negligible to extreme)
 * [[image:C_E_world_map.jpg]]
 *  · According to the GLASOD map for China, there is almost no cultivated land that is not classified as degraded in one way or another.