With reference to agricultural soils consider the following statements 1 A high content of organic m...........

Explanation:

Organic matter affects both the chemical and physical properties of the soil and its overall health. It effects soil structure and moisture holding capacity. Increased levels of organic matter and associated soil fauna lead to greater pore space with the immediate result that water infiltrates more readily and can be held in the soil. So, statement 1 is incorrect.

Sulfur is one of three nutrients that are cycled between the soil, plant matter and the atmosphere. The sulphur cycle describes the movement of sulphur through the atmosphere, mineral and organic forms, and through living things. Although sulphur is primarily found in sedimentary rocks, it is particularly important to living things because it is a component of many proteins.  Therefore, Statement 2 is incorrect.

Salinization occurs when significant amounts of water are provided by irrigation, with no adequate provision of drainage for the leaching and removal of salts, resulting in the soils becoming salty and unproductive. Salt-affected soils reduce both the ability of crops to take up water and the availability of micronutrients. They also concentrate ions toxic to plants and may degrade the soil structure. Statement 3 is correct.