HKDSE Geography/M5/Farming Inputs in the Sahel
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|Temperature||High, AMT 28 C|
|Annual range of temperature||Small, 15 C|
|Rainfall||Scanty (around 250-500 mm on average) and variable; much seasonal variation|
|Soil texture||Highly coarse, porous and permeable|
|Soil moisture content||Very low|
|Rivers||Very few; only drained by River Niger and River Nile|
Pastureland is limited since the carry capacity of the land is low.
Note on climate
- The Sahel has a semi-arid climate.
- Affected by high-pressure belts (subtropical highs), they face sinking air. The air diverges to form offshore winds. There is thus a loss of moisture. High pressure leads to a lack of uprising air and thus scanty rainfall.
- As it is an inland location, it lacks the mediating effect of seawater, so it is very hot in summer. Intense solar radiation creates a high evaporation rate, which reduce soil moisture, hindering crop growth.
|Infrastructure and amenities||Poor|
|Market||Nil (Subsistence farming)|