Covering over 3 million acres and extending from Mexico through Louisiana. Just at sea level or a couple of feet above, it also contains areas of salt-water marsh and drainage is slow. The water table is either at or just below the surface. Used mostly for cattle grazing, or wetland wildlife refuges, residents have developed wonderfully bountiful gardens by amending soils.
An ideal soil would consist of the above concentrations of minerals and organic matter and the other 50 percent would include 25 percent air and 25 percent water in the porous areas.