Question

Addition of gypsum to the irrigation water is recommended to overcome difficulties posed by:

• A. Highly saline irrigation supplies
• B. Irrigation supplies containing high quantities of sodium
• C. Irrigation supplies containing heavy sediment
• D. Irrigation supplies containing heavy metals

Hint:

Use gypsum to reclaim sodic soils or irrigation water high in sodium to prevent soil compaction and poor drainage.

Answer 1

The Correct Option is B

Gypsum (calcium sulfate) is added to irrigation water or soil to counteract the effects of high sodium levels. It replaces sodium ions in the soil with calcium ions, improving soil structure and permeability for water movement