National Cotton Council of America
Beltwide Cotton Conferences
January 8-11, 2008
Gaylord Opryland Resort and Convention Center
Nashville, Tennessee
The Cotton Foundation

Recorded Presentations

Thursday, January 10, 2008 - 4:00 PM

Replication and Repeatability - When Is Enough Enough?

Melanie B. Bayles, Laval M. Verhalen, Bruce E. Greenhagen, and Bradley R. Barnes. Oklahoma State University, Dept. of Plant & Soil Sciences, 472 Ag Hall, Stillwater, OK 74078

Researchers who are trying to measure significant differences among a variety of lines or cultivars for a particular trait or traits are often faced with a dilemma when it comes to the number of replications to use. They must balance the need for sufficient replications to be able to determine statistical significance with the very real limitations of space, manpower, and funding. This study was designed to give some insight into the optimum number of replications that should be used in an experimental design to be able to measure statistical differences for traits with differing degrees of environmental interactions.

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