Georgia Agricultural Experiment Stations
College of Agricultural and Environmental Sciences
The University of Georgia		 Research Report
Number 668
November, 2000
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Tifton, Georgia: Evaluation of Corn Hybrids for Silage, 2000, Irrigated
Company or   Hybrid Maturity   Forage Yield   Dry Grain Plant 2-Year Average Dry
Brand Name   Name Class   Dry Green   Matter Portion Population Forage Yield
          tons/acre   % % no. tons/acre
Short and Mid-Season                  
            
Southern States   SS859CL M   14.0 29.5   48.1 57 31581 12.3
Zimmerman   1851W S   13.1 30.3   43.1 49 31581 12.2
Pioneer   31R88 M   13.0 31.0   42.0 54 31799 .
Pioneer   32k61 S   13.0 26.2   49.5 51 31363 11.6
DeKalb   DK 687 M   12.9 29.5   44.0 52 30928 11.7
                       
NK   N 8811 M   12.9 28.8   44.8 54 30710 11.7
NK   N 83-N5 M   12.9 26.7   48.2 53 31363 11.8
AgraTech   905 M   12.1 26.4   45.8 54 28968 .
Dyna-Gro   X15548 M   12.0 27.3   43.6 53 30928 .
Pioneer   33J56 S   12.0 24.5   49.1 59 30057 11.5
            
Southland Genetic   SG1701 M   11.8 25.3   47.1 58 29839 .
Cargill   8311 M   11.8 26.7   44.0 52 30274 .
Terra   TR1157 S   11.7 24.2   48.3 54 30056 .
Pioneer   3154 M   11.6 25.0   46.4 51 29839 10.5
Croplan Genetics   TR1166Bt S   11.6 24.7   47.3 55 32452 .
            
Cargill   8681FQ M   11.2 23.3   48.4 57 29621 .
AgraTech   890 M   11.1 26.3   42.1 49 29403 .
Southern States   SS897 M   10.8 23.8   45.4 55 30492 10.2
Southern States   SS849CL M   10.6 21.3   50.0 56 30057 10.2
            
Average     12.11 26.3   46.2 54 30595 11.4
LSD at 10% Level     1.6 4.1   3.3 3 N.S.2 1.1
Std. Err. of Entry Mean     0.6 1.7   1.4 1 895 0.5
                       
Full-Season                      
                       
Southland Genetic   SG1836 F   14.1 31.4   44.7 47 28968 11.8
Greenwood   830 F   13.0 28.0   46.2 40 30057 11.6
NK   N91-R9 F   12.9 27.6   47.0 51 28750 12.4
Southland Genetic   SG1877 F   12.9 32.3   40.0 43 30710 11.8
Greenwood   845 F   12.6 30.0   42.1 40 29186 .
            
NK   McNair 508 F   12.3 28.3   43.4 43 31363 11.4
Southern States   SS1150 F   12.0 29.9   40.3 37 31364 .
AgraTech   1177 F   11.9 30.0   39.9 46 30056 .
Pioneer   30F33 F   11.4 25.6   44.6 44 30492 .
Greenwood   835 F   10.5 25.1   42.1 46 25701 11.4
            
Average     12.43 28.8   43.0 44 29664 11.7
LSD at 10% Level     N.S. 4.1   2.5 5 2437 N.S.
Std. Err. of Entry Mean     0.8 1.7   1.0 2 1012 0.9
            
1. CV = 10.9%, and df for EMS = 54.
2. The F-test indicated no statistical differences at the alpha = .10 probability level; therefore an LSD value was not calculated.
3. CV = 12.4%, and df for EMS = 27.
Bolding indicates entries yielding equal to highest yielding entry within a column based on Fisher's protected LSD (P = 0.10).
Planted: March 15, 2000.
Harvested: Short and Mid-Season: July 18, 2000. Full-Season: July 20, 2000.
Seeding Rate: Short and Mid-Season: 32,500 seeds/acre in 30" rows. Full-Season: 31,500 seeds/acre in 30" rows.
Soil Type: Tifton loamy sand.
Soil Test: P = High, K = Medium, and pH = 6.2.
Fertilization: 99 lb N, 130 lb P2O5, and 195 lb K2O/acre as preplant; 198 lb N/acre as sidedress.
Previous Crop: Soybean.
Management: Subsoiled, bedded, and rototilled; Aatrex, Prowl, and one cultivation used for weed control; Lorsban used for insect control; Nemacure used for nematode control; irrigated 11.0 inches.
                       
Test conducted by A. E. Coy and M. D. Pippin.
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