Land degradation is a universal problem and in arid lands it is usually described as “desertification” because it leads to the formation of deserts. In arid zones mostly two types of degradation are dominant: wind erosion and soil salinization. Some natural causes of land lead to desertification such as, low rainfall and associated drought phenomena, high temperatures and resultant global warming. The effects of natural causes of land degradation are complicated further by human induced activities such as there is a huge gap between de-forestation and afforestation rate in arid areas. Vegetation degradation is of serious consequence to the environments of Cholistan. It is caused by the inappropriate use of land due to the high population growth rate, later deficiency and unstable global climate changes. Prolonged overgrazing of land and crop residues in harvested fields weakens and degrades the vegetation and results in the depletion of plant diversity, and reduced biomass production which later in turn leads to reduced soil organic matter and the deterioration of the soil structure. Degradation process can cause a drastic decline in the soil productive capacity. Land degradation is a local problem in many areas but it has cumulative effects at regional and global scales. The countries of developing world in arid and semi-arid zones are the most seriously effected.
|Keywords:||Desertification, Arid Lands, Rehabilitation, Cholistan Desert|
Lecturer, Department of Geography, The Islamia University, Bahawalpur, Pakistan
There are currently no reviews of this product.Write a Review