Ultisols are the most common soil order in portions of North America, where annual precipitation ranges from 60 to 79 inches.
There are twelve different soil orders in the US, and ultisols are one among them. This soil order is predominantly found in North Carolina, which is located in the northern region of the United States. In this area of North Carolina, there are 60 to 79 inches of annual rainfall on average.
Ultisols are particularly likely to be found in humid regions or tropical areas. The ultisols are characterized by their dry and red clay soils as well as by their capacity to weather materials in humid and temperate environments.
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