When is permanent vegetation considered established?

Permanent vegetation is considered established when it is mature enough to survive and inhibits erosion. This stage indicates that the vegetation has developed a robust root system, which not only supports the plant’s growth but also plays a crucial role in stabilizing the soil. Well-established vegetation effectively reduces soil erosion by absorbing water and promoting infiltration, thereby mitigating runoff and preserving soil integrity.

In contrast, the other options do not adequately reflect the criteria for establishment. Covering less than 50% of the area suggests insufficient growth and coverage necessary to protect against erosion. Complete visibility of soil implies a lack of vegetation, which is contrary to the goal of establishing a protective plant cover. Lastly, the blooming of wildflowers, while a positive sign of growth, does not necessarily mean that the vegetation has reached a state of maturity needed for erosion control. Therefore, the essence of establishment hinges on maturity and functionality in erosion prevention.