The diagram below illustrates a method of soil conservation. Study it and answer questions that follow.
![SukagriPP1q21](https://www.easyelimu.com/images/mockpastpapers/sukellemo_2020/AGRI/SukagriPP1q21.PNG)
- Name the biological control measure of soil shown above.
- In what kind of topography is the soil control measure practiced?
- Name four other biological control measures of soil apart from the one named in (i) above.