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Average Precipitation: 300 to 1500 milliliters of rain per year
Average Temperature: 27 to 30 Degrees Celsius
Wind Patterns: The area is influenced by trade winds. It moves to the west and down, they come from the east. As the heat rises the moisture within the air evaporates creating a dry and arid region.
Soil Composition: Most soil is porous and extremely thin which allows rain to drain quickly. There are some exceptions where there are clayish and shallow soils though. It is usually rich in nutrients and minerals.
There are two levels: a grassy ground level and a woody plants
Limiting Factors: The lack of rainfall prevents the upper layer from becoming dominate Fires and grazing keep the grass level dominate. The grassy level depends on summer rainfall. Most species can survive through fires with only 10% of plants being killed. Also, they are experiencing a heavy conversion to agriculture.
Savannas are successfully being protected because the Kruger and Kalahari Gemsbok National parks protect the land. There are other reserves suchs as Etosha, Gemsbok, Chobe and Hwange National Parks, and Central Kalahari Game Reserve.