noun
cultivation
kul-tih-VAY-shun/ˌkʌltɪˈveɪʃn/
The careful tending of something to promote growth.
Successful tomato cultivation requires healthy soil, plenty of sunlight, and regular watering.

Etymology
Tilling supplies the image of growth encouraged by careful work. Although the root is agricultural, the English noun first described attention to knowledge and mental development, before its recorded use for raising crops.
In context
they started slash and burn agriculture that is they started burning forest and they started making land fit for cultivation
More examples
- The steep hillside makes cultivation difficult.
- Greenhouse cultivation protects these plants from frost.
- The cultivation of patience takes practice.
Forms
cultivation
cultivate verb — To tend something carefully to encourage growth.