This publication in the Southern Cooperative Series is considered a separate publication by each of the cooperating agencies of the Southern Cooperative Region. This publication may be mailed under the frank and indicia of each agency. This publication may also be printed from the web site.Commercial companies are mentioned in this publication solely for the purpose of providing specific information. Mention of a company does not constitute a guarantee or warranty of its products by the Agricultural Experimental Stations or an endorsement over products of other companies not mentioned.The Southern Agricultural Experiment Stations do not discriminate on the basis of race, sex, color, religion, national origin, age, disability, or veteran status in provision of educational programs and services or employment opportunities and benefits. Tis policy extends to both employment by and admission to the Universities. The Universities do not discriminate on the basis of race, sex or disability in the education programs and activities pursuant to the requirements of Title VI of the Civil Rights Act of 1964, Title IX of the Education Amendments of 1972, Section 504 of the Rehabilitation Act of 1973, and the Americans with Disabilities Act (ADA) of 1990.