Summary of the 2000 Wisconsin Corn Performance Trials

December 14, 2000 7(28):185-186

Joe Lauer, Corn Agronomist

The 2000 corn production season will be remembered as the one that could have been. Early planting set the crop up for good yield potential. Most of the state had good rainfall through silking. Lack of brace roots and increased lodging were observed. Reasons for greater lodging are unknown, but likely due to one or more of the following:

  • Stalk cannibalism, parasitism, "hungry kernels", and self-destruction
  • Early drought induced potassium deficiency
  • Early-season Anthracnose, late-season Diplodia
  • High winds and hail

In the fall lodged corn was harvested at 1 mph and growers wrestled with time v. yield issues. Yield potential was also lowered by early rust and later drought stress after R3 (but did not show due to growth stage). Early senescence was observed and caused by either early planting or drought. The season ended with good yields at low moisture.

Grain yield at many testing locations was greater than the 10-year average (Table 1). Trial averages ranged from 106 to 212 bu/A for all hybrids tested. Silage yield was also greater than the 10-year average at Fond du Lac and Marshfield (Table 2). Silage yields ranged from 5.5 to 9.1 Tons dry matter/A. Complete results are available at http://corn.agronomy.wisc.edu.

Table 1. 2000 Wisconsin Corn Performance Trials - Grain Summary (bu/A).
  1990-1999   2000 Percent
Location N Yield   N Yield Change
Arlington 1777 191   178 212 + 11
Janesville 1777 182   178 211 + 16
Lancaster 1777 175   178 178 + 2
             
Fond du Lac 1547 164   171 191 + 16
Galesville 1547 159   171 171 + 8
Hancock 1546 181   171 166 - 8
             
Chippewa Falls 1444 149   153 156 + 5
Marshfield 1034 149   153 166 + 11
Seymour 867 146   153 174 + 19
Valders 1444 151   153 153 + 1
             
Ashland 145 132   16 106 - 20
Spooner 1932 127   162 125 - 2
White Lake 645 91   54 111 + 22
Note: Seymour average includes New London 1990-1992.

Table 2. 2000 Wisconsin Corn Performance Trials - Silage Summary (T/A).
  1990-1999   2000 Percent
Location N Yield   N Yield Change
    T/A     T/A  
Arlington 388 9.3   66 9.1 - 2
Lancaster 311 7.7   66 7.8 + 1
             
Fond du Lac 284 8.7   77 7.6 - 13
Galesville 284 8.0   77 8.0 + 0
             
Marshfield 401 6.8   55 7.9 + 16
Valders 328 7.1   55 7.6 +7
             
Ashland 109 6.7   16 5.5 - 18

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