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Ppt of land degradation

In this ppt i try to explain introduction of land degradation .and also causes of it .and explain with figure . i expect that my ppt usefull to all.THIS PPT use for enviroment also.

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Ppt of land degradation

  1. 1. LAND DEGRADATION  INTRUDUCTION • Land degradation is a process in which the value of the biophysical environment is affected by a combination of human-induced processes acting upon the land. • It is viewed as any change or disturbance to the land perceived to be deleterious or undesirable. • Land degradation is the most important environmental problem currently challenging sustainable development in many parts of the world. The problem is most acute where the environment is intrinsically vulnerable and where the population is losing control of its own resources.
  2. 2. • Natural hazards are excluded as a cause; however human activities can indirectly affect phenomena such as floods and bush fires.
  3. 3. CAUSES OF LAND DEGRADATION 1. Land clearance, such as clear cutting and deforestation. 2. Agricultural depletion of soil nutrients through poor farming practices. 3. Livestock including overgrazing and over drafting. 4. Inappropriate irrigation and over drafting. 5. Urban sprawl and commercial development. 6. Vehicle off-roading. 7. Quarrying of stone, sand, ore and minerals. 8. Increase in field size due to economies of scale, reducing shelter for wildlife, as hedgerows and copses disappear.
  4. 4. 9. Exposure of naked soil after harvesting by heavy equipment. 10. Monoculture, destabilizing the local ecosystem. 11. Dumping of non-biodegradable trash, such as plastics 12. Soil degradation, e.g I. Soil contamination II. Soil erosion III. Soil acidification IV. Loss of soil carbon
  5. 5. Soil erosion by wind or water
  6. 6. • WATERLOGGING AND SALINIZATION OF IRRIGATED LAND. • OVER EXTRACTION OF WELLS, RIVERS AND DAMS .
  7. 7. EXCESSIVE AND CONTINUOUS USE OF FERTILISER, HERBICIDE AND PESTICIDE .
  8. 8. THANK YOU

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