http://soils.cals.uidaho.edu/soilorders/orders.htm
The type that I am going to specifically focus on is the order predominantly found here in Georgia. This order is ultisols. Ultisols are more commonly known as red clay soils. They are found in temperate and tropical regions. Besides Georgia, Ultisols can be found on other continents such as Asia, Africa, and South America. The red clay we see in Georgia that gets tracked into our houses and stains our carpet is that color because of iron oxide (or rust). Ultisols are also typically acidic. They can be easily exhausted, and therefore need the aid of fertilizers for successful cultivation. Fortunately, ultisols can be successful in a large range of moisture conditions.
For more interesting information on ultisols, you can check out this link:
http://en.wikipedia.org/wiki/Ultisols
