State Factor Model of Soil Formation. State Factor Model S = f(C,O,R,PM,T,…) –C – climate –O – organisms –R – relief –PM – parent material –T – time Model.
Mollisols Alfisols Inceptisols Entisols Example of an Udipsamment, which is an Entisol – A young poorly developed soil in a sandy glacial outwash.
Soil Quality: The view through the prism of Soils 101 D.W. Johnson Natural Resources and Environmental Science University of Nevada, Reno.
Soil Orders Highest level in Soil Taxonomy 12 orders Defined by presence/properties of diagnostic horizons, other specific soil properties Related to state.
Chapter 3 ACID, SALINE, AND SODIC SOILS. Why study acid, saline, and sodic soils? Acid, saline, and sodic soils have unique chemical and physical properties.
Chapter 3
Order (12) Suborder (~ 65) Family (~ 8,000) Great Group (~ 250) Subgroup (~ 1,500) Series (~ 20,000) (in U.S)
SOIL SUBORDERS
