This lecture will help you understand: Soils and agriculture


Soils are becoming degraded in many regions



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Soils are becoming degraded in many regions.

Soil degradation by continent

  • Europe’s land is most degraded because of its long history of intensive agriculture.

  • But Asia’s and Africa’s soils are fast becoming degraded.

Causes of soil degradation

Most soil degradation is caused by:

Prehistory of agriculture

  • People began shifting from hunting and gathering to agriculture about 10,000 years ago.

  • It probably began thus:

  • People brought back to camp the best wild fruits and seeds they could gather.

  • Some were dropped or disposed of nearby.

  • Plants grew near encampments.

  • Plants with favored qualities were selected and bred by proto-farmers (artificial selection).

Origins of agriculture



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