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GK QUESTION#3209

Consider the following statements: 1. The presence of a high concentration of hydrogen ions indicates acidic soil. 2. Nitrogen is the key indicator of soil acidity. 3. Acidic soil typically has a pH value less than 7. Which of the statements given above is/are correct?

  1. A1 and 3 onlyCorrect answer
  2. B2 and 3 only
  3. C1 and 2 only
  4. D1, 2 and 3
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Answer

A. 1 and 3 only

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Explanation

Soil acidity is related to hydrogen-ion activity and is expressed by pH. Acidic soil has pH below 7 under the usual convention. Nitrogen content is not itself the measure of acidity, although nitrogen transformations can affect soil pH. Statements 1 and 3 are correct.

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