Question 1 Report
During a study of desertification on the edge of the Sahel, Fig. 1 shows two neighbouring grazing areas. One area has a fenced enclosure that livestock cannot enter. Table 1 gives observations collected at the end of the dry season. The community wants to protect soil from wind erosion.
| Area | Vegetation cover (%) | Mean soil depth (cm) |
|---|---|---|
| Inside enclosure | 46 | 18 |
| Outside enclosure | 11 | 7 |
(a) Which area has the deeper mean soil? [1]
(b) Outline one way vegetation can reduce wind erosion in this dry landscape. [2]
(c) Draw two tufts of grass on Fig. 1 in the area where vegetation should be increased. [1]
(a) Inside enclosure [1] (b) Vegetation roots bind/hold soil [1]; stems reduce wind speed/trap moving sediment [1]. (c) Two grass tufts drawn in the bare, grazed area outside the enclosure [1]
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