(par 7.3.2) Erosion is the cancer of agriculture
Erosion is the cancer of agriculture http://www.agrisa.co.za/Dokumente/Hulpbron/Erosie.pdf Erosion is a major environmental problem in South Africa and there are currently no official structures in place to monitor and control erosion. Efforts aimed at controlling the problem only manage to slow down erosion, not to stop it. As a result the country’s arable soil resources are […]
(par 7.3.2) Desertification (taken from Wikipedia)
Desertification http://en.wikipedia.org/wiki/Desertification From Wikipedia, the free encyclopedia Global desertification vulnerability map Lake Chad in a 2001 satellite image, with the actual lake in blue. The lake has shrunk by 94% since the 1960s.[1] Desertification is a type of land degradation in which a relatively dry land region becomes increasingly arid, typically losing its bodies of water as well as vegetation […]
(par 7.3.2) Causes and Effects of Desertification
Causes and Effects of Desertification http://desertificationb.tripod.com/id3.html WHAT CAUSES DESERTIFICATION? Overgrazing Overgrazing was not as large of a problem long ago because animals would move in response to rainfall. People would move with the animals so it prevented overgrazing in such areas. Now, humans have a steady food supply so they do not have to move […]