Twelve Soil Orders of the World
Alfisols- Great horizons for plants and grass and trees
Ultisols-reddish clays of Southeast
Inceptisols- found in hills; young and widespread
Andisols- volcanic ash rocks
Entisols-least developed but found far and wide; found in steep rocky slopes and riversides
Aridisols- desert sands
Gelisols- frozen
Vertisols- lots of cracks, made of clay, shrink and swell
Histosols- dark peats and mucks; soggy, wet, organic
Oxisols- tropical; red; low fertility
Mollisols- grow in corn fields; Midwest
Spodosols- low pH; pines in Coastal Plains
Soils Found in GA
Georgia: Tifton (Ultisol)
The Tifton series was one of the first series to be recognized in Georgia. Tifton soils occur throughout the Southern Coastal Plain in Georgia. They are the most extensive soils in Georgia. They occur on more than 2 million acres in the State. Tifton soils formed in loamy sediments of marine origin. They are among the most important agricultural soils in the State. About 27% of GeorgiaĆs prime farmland is in areas of Tifton soils. Cotton, peanuts, soybeans, and corn are the principle crops grown on these soils.
What is Micaceous Schist?
Schist is a crystalline metamorphic rock, mostly composed of more than 50% tabular and elongated minerals with grainsize coarse enough to be visible to the unaided eye. Schists have a developed tendency to split into layers.Schists have a foliated or plated structure (schistosity). Schists are distinguished from other foliated rocks (e.g. slates and gneisses) by the size of their mineral crystals:
The crystals are larger than those of slates (macroscopically not visible) but smaller than those of gneisses (coarse grained, opposed to finely foliated schists). The protolith of schists can be igneous (e.g. basalt, volcanic tuff) or sedimentary (clay, mud).
Schists are classified and named on basis of their mineralogy:
The most common minerals of schist are mica; mica-schist contains quartz and mica (biotite or muscovite) as main minerals, schist is often named after additional minerals, e.g.







