The constraints and special steps necessary for testing were presented. Advantages and disadvantages also detailed. Elaborate field testing plans are necessary in order to retain the xenia ef fect. Excellent slides and transparencies were used to illustrate the protocol for testing. Field Plot Design Daryl Bowman, N. C. State University - information was presented on a computer program that will meet the following conditions for field plot design.
Program keeps forcing randomization until conditions above are met for four out of five reps.
Experiments had been conducted with corn comparing no-till and conventional tillage with different varieties. Experiments with n o-till and conventional tillage as main plot and varieties in split plots were conducted. Data were collected and AOV analyses were done. The critical interaction, tillage vs. variety effects were n.s. Conventional tillage data is valid f or no-till situations.