Parishes of Louisiana with major crops grown surveyed for determining
File:General soil map, LaFourche Parish, Louisiana. LOC gm69002240.jpg - Wikimedia Commons
File:General soil map, Fannin County, Georgia LOC 2012588218.jpg - Wikimedia Commons
Soil Maps of the United States of America - Brevik - 2013 - Soil Science Society of America Journal - Wiley Online Library
Soil Maps of the United States of America - Brevik - 2013 - Soil Science Society of America Journal - Wiley Online Library
Using Soil Maps to Evaluate Land - National Land Realty News
General soil map, Izard County, Arkansas - PICRYL - Public Domain Media Search Engine Public Domain Search
87 General soil map Images: PICRYL - Public Domain Media Search Engine Public Domain Search
An Overview of Louisiana Soils
General soil map, St. Tammany Parish, Louisiana.