What effect does poor soil and deforestation have on land in Africa?

it has an effect by reducing crop cultivation and reduce the economy A main cause of soil degradation is lack of manufactured fertilizers being used, since African soil lacks organic sources of nutrients. ... There are also ecological causes of the poor soil quality. Much of the soil has rocks or clay from volcanic activity. Other causes include erosion, desertification, and deforestation.

The study shows that changing land use from forest to crop land reduces rainfall over neighbouring trees by around 50% due to changes in the surface temperature which affects the formation of rain clouds.

Explanation:

is there a year set? the question is incomplete