Where are Deserts being Created .?

On the edges of some of the Earths Natural deserts, the environment is being upset by poor farming methods and mismanagement.

Semi – Desert areas have fragile soils and difficult climates.Several good years are often followed by several bad years. In the good years, farmers may extend the cultivated areas, or increase their flocks and herds and dig more wells . But ina series of dry years,
Crops fail, animals exhaust the pasture , the bare soil is roded and many wells dry up. Such problems created the dust bowl in the USA in the 1930 and extended the Sahara in the 1970s.