
1. This document is Circular 1269, one of a series of the School of Forest Resources and Conservation, Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida. First published July 2002. Minor revision September 2006. Please visit the EDIS Web site at http://edis. ifas.ufl.edu.
2. Janice Easton and Alison Bowers are former graduate students, and Martha Monroe, Assistant Professor, School of Forests Resources and Conservation, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, 32611-0410.The Institute of Food and Agricultural Sciences (IFAS) is an Equal
Opportunity Institution authorized to provide research, educational
information and other services only to individuals and institutions
that function with non-discrimination with respect to race, creed,
color, religion, age, disability, sex, sexual orientation, marital
status, national origin, political opinions or affiliations.
For more information on obtaining other extension publications,
contact your county Cooperative Extension service.
U.S. Department of Agriculture, Cooperative Extension Service,
University of Florida, IFAS, Florida A. & M. University Cooperative
Extension Program, and Boards of County Commissioners Cooperating. Larry Arrington, Dean.