Multiple choice

Usara soils contain a larger proportion of sodium, potassium and magnesium. What is the result of the presence of these minerals in the soil?

  1. The soil becomes very fertile.

  2. The soil becomes infertile and does not support any vegetative growth.

  3. The soil becomes alkaline and has a rich humus and organic content.

  4. The soil becomes acidic with low humus content.

  5. The soil has slow absorption and loss of moisture.
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B Correct answer
Explanation

This is the correct answer. 

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