Desertification

Question 1

Desertification

Answer 1

Is the degradation of land so that it becomes more desert-like(drier and less productive). Soil erosion is a key part of desertification. Soil that is exposed is easily removed by water or wind. The nutrients are washed away and the soil become unproductive.

Question 2

Causes by humans

Answer 2

• deforestation
• farming
• population growth
• cattle farming

Question 3

Causes by climate change

Answer 3

• lack of rainfall

- temperatures are expected to increase

Question 4

Water management

Answer 4

• growing crops that do not need much water can reduce water use
• using drip irrigation on crops instead of surface irrigation, means that soil is not eroded and less water is evaporated

Question 5

Tree planting

Answer 5

• trees can planted as windbreaks to protect soil from wind erosion
• trees used to stabilize the sand
• trees provides shade for growing crops
• decayed leaves from trees gives nutrients back to soil

Question 6

Soil management

Answer 6

• leaving areas to rest and lets them recover nutrients

- rotating crops that use different nutrients from soil