Georgia Agricultural Experiment Stations
College of Agricultural and Environmental Sciences
The University of Georgia		 Research Report
Number 668
November, 2000
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Griffin, 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                  
                       
Pioneer   3154 M   7.3 19.6   36.9 40 * 8.0
Zimmerman   1851W S   6.8 19.6   34.4 38 * .
NK   N 8811 M   6.8 20.4   33.1 43 * 8.5
Southern States   SS859CL M   6.7 19.8   34.0 46 * 7.7
Pioneer   33J56 S   6.7 18.1   36.7 45 * 7.5
                       
Pioneer   31R88 M   6.7 19.6   33.9 43 * .
Southern States   SS849CL M   6.3 18.8   33.5 44 * 7.5
Southern States   SS897 M   6.2 18.0   34.5 43 * 7.1
Pioneer   32k61 S   6.0 15.8   37.9 41 * 7.1
DeKalb   DK 687 M   5.9 17.1   34.2 39 * 7.0
            
Average     6.51 18.7   34.9 42 * 7.5
LSD at 10% Level     N.S.2 2.0   1.8 3   N.S.
Std. Err. of Entry Mean     0.3 0.8   0.8 1   0.4
            
Full-Season                      
            
Southern States   SS1150 F   7.0 17.5   39.9 33 + .
NK   McNair 508 F   6.5 15.9   40.5 35 + .
Southland Genetic   SG1877 F   6.5 14.7   43.8 35 + .
NK   N91-R9 F   6.5 13.1   49.4 43 + .
Pioneer   30F33 F   6.2 16.9   36.9 30 + .
                       
AgraTech   1177 F   6.1 15.2   40.1 38 + .
Greenwood   835 F   5.3 13.0   40.6 38 + .
            
Average     6.33 15.2   41.6 36 + .
LSD at 10% Level     0.8 2.2   2.9 4   -
Std. Err. of Entry Mean     0.3 0.9   1.2 2   -
            
1. CV = 10.1%, and df for EMS = 27.
2. The F-test indicated no statistical differences at the alpha = .10 probability level; therefore an LSD value was not calculated.
3. CV = 10.9%, and df for EMS = 18.
Bolding indicates entries yielding equal to highest yielding entry within a column based on Fisher's protected LSD (P = 0.10).
Planted: April 10, 2000.
Harvested: July 31, 2000.
Seeding Rate: * Seeded at 31,000 seeds/acre in 30" rows, but due to bird damage thinned to 26,500 plants/acre. + Seeded at 28,500 seeds/acre in 30" rows, but due to bird damage thinned to 24,000 plants/acre.
Soil Type: Pacolet coarse sandy loam.
Soil Test: P = Medium, K = High, and pH = 6.9.
Fertilization: 49 lb N, 98 lb P2O5, and 147 lb K2O/acre as preplant; 200 lb N/acre as sidedress.
Previous Crop: Soybean.
Management: Moldboard plowed and rototilled; Aatrex and Lasso used for weed control; irrigated 7.0 inches.
            
Test conducted by J. L. Day and P. A. Rose.
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