Soils of Louisiana

Ultisols — strongly weathered, leached soils with a clay-enriched subsoil

The state soil, Ruston, ranks 4th of 324 series here on 652,409 acres. First place goes to Guyton, an Alfisol covering 5.5% of the state’s mapped soil. No order holds a majority; Alfisols lead with 37.4%, ahead of Ultisols at 21.5%.

Atlas series mapped in LouisianaGuide: state soils and where series began