Looking Back on Corn Production during 2004

 December 16, 2004  11(28):196-197

Joe Lauer, Corn Agronomist

Spring planting conditions were good through early May after which conditions were cooler and wetter than average. The north and eastern areas of Wisconsin had record rainfall during May and early June often delaying planting. Many acres in eastern Wisconsin were not planted until July. Accumulation of growing degree units was below average.  Insect and disease pressure was not significant. Plant emergence and stands were above average. Corn development was behind average due to cool growing conditions, but development caught up somewhat during September. A killing frost did not occur until early-October, but in some areas light frost occurred in late August. Both corn silage and grain harvest were delayed due to slow development caused by cool temperatures during the growing season.

Silage and grain yields were quite variable Tables 1 and 2). Yields were above average in southwestern Wisconsin. During the fall harvest season, hybrids generally had good standability and grain moisture was greater than normal. The plots at Fond du Lac were variable due to wet field conditions after planting and wildlife damage. Plots at Rhinelander were not harvested due to high grain moisture (>40%). Lancaster was the highest grain yielding site and was 31% above its 10-yr average (Table 1). Lancaster was the highest silage yielding site, but Valders was 28% above its 10-yr average.

Table 1. Summary of the 2004 UW corn hybrid performance trials  for grain yield (bu/A) conducted at twelve locations in Wisconsin.  N= number of hybrids tested.
  1994-2003   2004 Percent
Location N Yield   N Yield change
Arlington 1841 197   174 210 7
Janesville 1840 194   174 236 22
Lancaster 1840 184   174 241 31
Fond du Lac 1623 174   171 168 -3
Galesville 1620 175   171 208 19
Hancock 1619 194   171 215 11
Chippewa Falls 1523 149   145 174 17
Marshfield 1357 156   145 150 -4
Seymour 1199 162   145 154 -5
Valders 1525 151   145 183 21
Spooner 1697 141   123 137 -3
White Lake/Rhinelander 564 109   --- --- ---

Table 2. Summary of the 2004 UW corn hybrid performance trials for silage yield (T/A) conducted at nine locations in Wisconsin. N = number of hybrids tested.
  1994-2003   2004 Percent
Location N Yield   N Yield change
Arlington 491 9.4   52 9.7 2
Lancaster 491 7.9   52 10.1 27
Fond du Lac 476 8.5   57 7.7 -10
Galesville 477 8.6   61 9.1 6
Chippewa Falls 104 7.5   51 8.1 8
Marshfield 486 6.8   52 7.1 5
Valders 491 6.6   52 8.5 28
Rhinelander 42 6.3   27 6.4 2
Spooner 84 6.6   54 7.9 19

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