Multiple choice

Salinization occurs when the irrigation water accumulated in the soil evaporates, leaving behind salts and minerals. What are the effects of salinization on the irrigated land?

  1. It greatly increases the crop production.

  2. It makes some soils impermeable.

  3. It raises the water table.

  4. It fills the air spaces in the soil with water.

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Salinization is a process that results from:  High levels of salt in the soils  Landscape features allow salts to become mobile (Movement of water table).  Climatic trends favour accumulation.  Human activities such as land clearing, aquaculture activities, irrigation, and the salting of icy roads The consequences of salinity are  � salt makes some soils impermeable that have detrimental effects on plant growth and yield  � damage to infrastructure (roads, bricks, corrosion of pipes and cables)  � reduction of water quality for users, sedimentation problems  � soil erosion ultimately, when crops are too strongly affected by the amounts of salts.  Salinity is an important land degradation problem. Soil salinity can be reduced by leaching soluble salts out of soil with excess irrigation water. Soil salinity control involves water table control and flushing in combination with tile drainage or another form of subsurface drainage.