The following diagram is a soil diagram chart. This chart is used to determine the nature of the dirt. Dirt, as it is so elegantly referred to, is a composition of three components: clay, silt and sand. As shown by the diagram, given your percentages of the three components of your dirt sample, you can classify your sample. For percent clay, you read horizontally to your right. For percent silt, you read Southwest of your number. Finally, for your percentage of sand, you will read Northwest of your percentage.
The following diagram is Munsell Soil Color chart. It is named after the Professor Albert H. Munsell and was adopted by USDA, United States Department of Agriculture. It bases its system on chroma, value and hue of a sample. Value represents the shade of white to black the color seems. Hue represents the general color, of the spectrum, the sample. Chroma is the shade and mixture level of the hue and value levels.
This diagram below depicts the 12 soil orders of the world. The 12 soil orders of the world are alfisol, andisol, ardisol, entisol, gelisol, histisol, inceptisol, mollisol, oxisol, spodosol, ultisol and vertisol. The following chart is difficult to see, however, you can search the web for this poster or use a search engine to find out about any specific soil type. The predominant soil type for the state of Georgia is ultisol with large sites of alfisol and inceptisol.
*Pictures Courtesy of Google Images
*Information Courtesy of Wikipedia.org, http://www.ga.nrcs.usda.gov/technical/soils/mlra136.html, http://www.mo15.nrcs.usda.gov/news/state_soils/ga_ss.html
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