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Geography Optional 300+ Score Pack · Model answer

Soil erosion and soil degradation are threat to food supply. Discuss.

  • UPSC 2021
  • Biogeography

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Soil erosion is the physical removal of topsoil by water and wind; soil degradation is the wider decline in productive capacity — physical (crusting, compaction), chemical (salinity, acidity, nutrient loss) and biological (humus and soil-life loss).

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What the full answer covers

  • How Soil Loss Becomes Food Loss
  • The Global Scale
  • India's Exposure
  • How Large Is the Threat?
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