Soil Health and Salinity Concepts

The video discusses land degradation, focusing on soil erosion and soil salination. It explains how these processes impact the environment and human activities, detailing the causes, effects, and prevention methods. Soil erosion is highlighted as a major threat to soil health, with water and wind as primary agents. The video also covers soil salination, its causes, and methods for reclamation, including physical, chemical, and biological approaches.

What are the two main causes of land degradation?

• Climate change and pollution

• Soil erosion and water logging

• Natural and anthropogenic activities

• Deforestation and urbanization

Which of the following is a major threat to global soil health?

• Soil compaction

• Soil erosion

• Water logging

• Soil salination

What is the primary cause of soil erosion?

• Excessive rainfall

• Poor soil structure

• Exposure of soil to wind or water

• Deforestation

Which method is NOT a way to prevent soil erosion?

• Reforestation

• Mulching

• Leaving land bare

• Establishing wind breaks

What causes soil salination?

• Deforestation

• Excessive use of fertilizers

• High concentration of soluble salt

• Over-irrigation

Which type of soil has a high amount of exchangeable sodium but low soluble salts?

• Alkaline soils

• Saline-sodic soils

• Sodic soils

• Saline soils

What is primary salinity?

• Salinity from chemical fertilizers

• Salinity due to poor drainage

• Natural salinity

• Salinity caused by human activities

Which method involves making structural changes in soil to reduce salinity?

• Physical methods

• Chemical methods

• Organic methods

• Biological methods

What is the purpose of adding organic matter to soil?

• To enhance soil compaction

• To increase soil acidity

• To mask soil salinity

• To improve soil drainage

Which method uses electro dialysis to remove salt from soil?

• Biological reclamation

• Chemical reclamation

• Physical reclamation

• Electro reclamation