The organic matter and available potassium increased by a big margin will were vital question in the course of the fertility restoration of degenerated soil.
大幅度提高土壤有机质含量及供钾水平是退化土壤肥力恢复过程中面临的重要问题。
Soil erosion and soil degenerated by erosion is a main environmental problem in the world.
土壤侵蚀及其导致的土壤质量退化是世界性的重大环境问题之一。
Meanwhile, it shows that the reason of soil degenerated by erosion is the unreasonable use of land by comparing present situation of land utilization and its adaptability.
通过土壤资源的适宜性评价与土壤利用现状比较，指出土壤资源利用不合理是导致土壤侵蚀退化的根本原因。
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