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 ?
A
1 and 2 only
B
3 only
Correct Answer
C
1 and 3 only
D
1, 2 and 3
Explanation
Statement 3 is correct because excessive irrigation, especially in arid regions with poor drainage, triggers capillary action that brings underground salts to the surface, leading to salinization. Statement 1 is fundamentally incorrect because organic matter acts like a sponge, significantly increasing rather than reducing a soil's water-holding capacity. The core concept tested is the physical and chemical properties of soil, specifically how agricultural practices and organic components influence soil health and nutrient cycling.
Soil ScienceSoil Properties and DegradationAgricultural soilsorganic matterwater holding capacitysulphur cycleirrigationsalinizationagricultural lands