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Standard VIII
Biology
Question

Soil conservation is the process where
  1. Soil is aerated
  2. Sterile soil is converted into fertile soil
  3. Soil is protected against loss
  4. Both B and C

A
Soil is protected against loss
B
Sterile soil is converted into fertile soil
C
Both B and C
D
Soil is aerated
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Solution
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Soil conservation is the prevention of soil from erosion or reduced fertility caused by overuse, acidification, salinization or other chemical soil contamination. Techniques for improved soil conservation include crop rotation, cover crops, conservation tillage and planted windbreaks, that affect both erosion and fertility.

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