Q82.
With reference to agricultural soils, consider the following statements: 1. A high content of organic matter in soil drastically reduces its water holding capacity. 2. Soil does not play any role in the sulphur cycle. 3. Irrigation over a period of time can contribute to the salinization of some agricultural lands. Which of the statements given above is/are correct?
Answer
B
Explanation
Statement 1 is not correct: Organic matter INCREASES moisture holding capacity (not reduces it). Statement 2 is not correct: Sulfur IS cycled between the soil, plant matter and the atmosphere - soil plays a very important role in the sulfur cycle. Statement 3 is correct: Secondary salinization occurs when irrigation water, with no adequate drainage, results in soils becoming salty and unproductive.