When we think of desertification, we first think about prolonged drought conditions. Desertification can also be the result of degradation of the soil in an area as the most recent definition includes the permanent loss of fertility in an area. All of the choices below result in soil degradation leading to
desertification EXCEPT
A) The buildup of salts in irrigated soils due to evaporation.
B) The presence of rocky fields that have been tilled but not planted.
C) Overfarming or drought can change the soil so that rain no longer penetrates
D) Deforestation results in erosion: nutrient-rich top soil blows or washes away.