Munsell Soil Chart

When Scientists work with dirt and they need to know what combinations of other soils are combined to make the dirt they are working with they use the Munsell Soil chart.  This chart helps them to identify what soils are present.  They use the color of the soil to identify hue and chroma. 
There are 12 soil orders found on Planet Earth.  This website describes them: http://soils.cals.uidaho.edu/soilorders/orders.htm
Another method of identifying soil is by using the soil texture dichotomous key.  This is a step by step flow chart that asks a series of questions and depending on the answer to those questions it will give a soil type or send you to another question in the chart that will help the user identify the soil.
This is an example of a Soil Texture Dichotomous Key: http://www.landhelp.info/documents/DichotomusKey6.pdf?PHPSESSID=f78117b04cbe1d39e82c3dc3cf85cf1e

The most prominent Soil type in GA is Inseptasol.  It is pictured below.



Here is a Map of the Soil in GA: