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?

Let's analyze each statement:

Statement 1: A high content of organic matter in soil increases, not reduces, its water-holding capacity. Each 1 percent increase in soil organic matter can help the soil hold significantly more water.

Statement 1 is not correct.

Statement 2: Soil plays a crucial role in the Sulphur cycle. Sulphur cycles between the soil, plant matter, and the atmosphere, and is a key component of many proteins.

Statement 2 is not correct.

Statement 3: Irrigation, over time, can lead to salinization, where salt deposits accumulate in the soil to harmful levels for crops. This is a well-known problem in agriculture.

Statement 3 is correct.

Hence, only statement 3 is correct.