PREFACE

In this research report, the results of the 1997 corn performance trials are presented. Corn performance trials were conducted at six locations throughout Georgia in 1997 (see map inside back cover). Short-season, mid-season, and full-season hybrids were planted at Tifton, Plains, and Midville in the coastal plain region, at Griffin in the Piedmont region, at Calhoun in the limestone valley region, and at Blairsville in the mountain region. Hybrids used for silage were evaluated at Tifton, Griffin, Calhoun, and Blairsville. Preliminary experimental hybrids were tested at Tifton only.

Plots were over-planted and thinned to the desired populations. Information concerning fertilization and cultural practices used in each trial is included with the tables. Grain harvesting was done with a small plot combine, and yields were adjusted to 15.5% moisture. Since data averaged over several years indicate a hybrid's yield potential better than data from only a single year, average yields over several years are included in this report.

The least significant difference (L.S.D.) at the 10% level has been included in the tables to aid in comparing hybrids. If the yields of any two hybrids differ by the L.S.D. value or more, they may be considered different in yield ability. Bolding is used in the performance tables to indicate hybrids with yields statistically equal to the highest yielding entry in the test. The standard error (Std. Err.) of an entry mean is included at the bottom of each table to provide a general indicator of the level of precision of each experiment. The lower the value of the standard error of the entry mean, the more precise the experiment.

Producers of hybrid seed corn are invited to enter their hybrids in the Georgia performance trials. To help finance this program, a $90 fee is assessed for each hybrid entered in each test. Most hybrids entered are commercially available in Georgia, but a few experimental hybrids are also entered. Entry of a hybrid in these trials does not imply endorsement or recommendation by the University of Georgia College of Agriculture.

This report is one of four publications presenting the 1996-97 performance of agronomic crops in Georgia. For information concerning the performance of other crops, refer to one of the following research reports: 1996-97 Small Grains Performance Tests, Experiment Station Research Report #646, 1996-97 Canola Performance Tests, Experiment Station Research Report #645, and the 1996 Field Crops Performance Tests, Experiment Station Research Report #644.

This report, along with performance test information on other crops, is also available at our web site www.caes.uga.edu/commodities/swvt/. Additional information may be obtained by writing Dr. Anton E. Coy, Crop and Soil Sciences Department, Coastal Plain Experiment Station, Tifton, GA 31793-0748 or Dr. Paul L. Raymer, Crop and Soil Science Department, University of Georgia, Georgia Station, Griffin, GA 30223-1797.