The main factor that contributed to the rising of the Kingdom of Ghana is the African trade in gold and salt. Though the resources did not come from Ghana, it was situated in a trading route between salt miners in North Africa and gold traders from South Africa.
The use of bartering to trade goods, instead of money
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To build a sod house, you needed the right kind of grass — grass that had densely packed roots that would hold the soil together. So, Nebraska settlers would search for fields of buffalo grass, little blue stem, wire grass, prairie cord grass, Indian grass, and wheat grass. The next task was to cut the sod into bricks.