The natural vegetation in much of central Africa is woodland / forest which protects soil, acts as a sponge for water and feeds soil life. In forest as pictured above one can push a rod 1m deep into moist soil whereas a few meters away, on reverting crop land, the same rod will only penetrate 10cm.
It is a fact that much of this natural ecosystem has been replaced by double annual cropping on cleared land. It is inevitable that more land is going to be cleared in the near future. This is ecologically and economically unsustainable.
We have to mimic a natural system in order to utilise land sustainably. In a prairie / savanna ecosystem we can use livestock under a grazing regime of Ultra High Density Grazing. In regard to forest / woodland, I believe, we are still a way behind. We need to take drastic measures in order to create an appropriate “biological” infrastructure on crop land. For a start, we need: