Under sedimentation the fertile soil gets covered by less fertile sediments; and leading to make the soil unfit for cultivation.
This is because many environmental factors are caused over long periods of time, and then, once identified, will take a long time to solve.
Political marginalization, poor farming method, lack of education, poor mining method, climates changes ,lack of alternatives of electricity instead of wood, over dependence on natural resources and lack of future markets.
More so population increase has been termed the major cause land degradation in Ethiopia and other third world developing world. Over cutting of vegetation occurs when people cut forests, woodlands and scrublands-to obtain timber, fuel wood and other products at a pace exceeding the rate of natural re-growth.
The only solution is to plant trees with strong roots in an effort to hold the soil together, to prevent further damage, and, years later, to try to replant crops. Though as it is a long-term effect it is very hard to reverse.
Soil salinity is another problem related to the removal of trees. They collectively leased degraded land and revived them through traditional farming.