Managing soil erosion：練習題

How does contour ploughing help reduce soil erosion on sloped agricultural land?

A farmer decides to use a combination of intercropping and maintaining vegetation cover. Why is this more effective for managing soil erosion than standard monoculture?

State one way in which mixed cropping helps to manage soil erosion on a farm.

Describe the specific role of wind breaks in a strategy for managing soil erosion on flat, open plains.

In the context of managing soil erosion on steep slopes, compare the physical structure and function of terracing versus contour ploughing.

A farmer is working on a sloped land area.
(a) Describe the technique of contour ploughing.
(b) Explain how this method reduces the speed of surface run-off compared to ploughing up and down the slope.

Desertification is the ultimate consequence of severe soil mismanagement in semi-arid areas.
(a) Explain how overcultivation contributes to the process of desertification.
(b) Propose a management plan to restore an area affected by early-stage desertification using bunds and managed grazing. Justify your choices.