Chapter

Soil Orders

From Introduction to Soil Science by Amber Anderson and Rivka Fidel

Concepts

1. NRCS Soil

   "The NRCS system organizes soils into twelve major orders, each ending in “-sol.” Orders are determined by major climate factors, dominant materials, degree of weathering, or special soil-forming cond

2. Distinguishes Major

   "Gelisols form under permafrost, Histosols contain accumulated organic matter, and Spodosols form through movement of organic matter and metals under acidic conditions. Andisols develop from volcanic