The Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, age, disability, and where applicable, sex, marital status, familial status, parental status, religion, sexual orientation, genetic information, political beliefs, reprisal, or because all or a part of an individual’s income is derived from any public assistance program. (Not all prohibited bases apply to all programs.) Persons with disabilities who require alternative meansfor communication of program information (Braille, large print, audiotape, etc.) should contact USDA’s TARGET Center at (202) 720-2600 (voice and TDD) | USDA United States Department of Agriculture ÔNRCS Natural Resources Conservation Service Keys to Soil Taxonomy Eleventh Edition 2010 Keys to Soil Taxonomy By Soil Survey Staff United States Department of Agriculture Natural Resources Conservation Service Eleventh Edition .