With reference to agricultural soils, consider the following statements:<br/>1. A high content of organic matter in soil drastically reduces its water holding capacity.<br/>2. Soil does not play any role in the sulphur cycle.<br/>3. Irrigation over a period of time can contribute to the salinization of some agricultural lands.<br/><br/>Which of the statements given above is/are correct?

1. High organic matter generally improves soil structure and increases water-holding capacity; it does not drastically reduce it. Verdict: Incorrect.

2. Soil is an important reservoir and medium in the sulphur cycle; sulphur is stored in soil organic matter and minerals and is transformed by microbes. Verdict: Incorrect.

3. Long-term irrigation, especially in poorly drained areas or with mineral-rich water, can cause salt accumulation in the root zone, leading to salinization. Verdict: Correct.

Therefore, only statement 3 is correct.