Corn Silage Drydown In Wisconsin During 1998

September 10, 1998 5(24):133-134

Joe Lauer, Corn Agronomist

Below are silage moisture contents for various counties in Wisconsin. Projected dates for silage harvest will change as environmental conditions influence maturity and the rate of drydown. Carefully monitor shorter-season hybrids for silage moisture this year. It looks like silage harvest will be early in the northern half of the state this year. Reports are based on drydown data collected by University of Wisconsin county agents.

For a complete report see the internet site at http://corn.agronomy.wisc.edu. Reports are summarized by: 1) Drydown progress, 2) Hybrid selection and Planting date influences, and 3) other county agent reports based on farmer and consultant information.

County Sample
Date
  Silage moisture (%)   Predicted date range of silage harvested at 65% moisture
N Minimum Average Maximum
Ashland
Mike Mlynarek (715) 6827268
Sep 3 8 56 66 72 Aug 30 Sep 9
Calumet
Matt Glewen
(920) 8491450
Aug 25 43 60 68 77 Aug 26 Sep 3
Dodge
Jim Fanta
(920) 3863790
Aug 26 9 70 72 73 Sep 7 Sep 9
Aug 31 9 66 70 72 Sep 7 Sep 11
Fond du Lac
Mike Rankin
(920) 9293171
Sep 1 57 59 64 69 Aug 27 Sep 1
Sep 8 18 58 63 67 Sep 1 Sep 6
Jefferson
Matt Hanson
(920) 6747295
Aug 21 8 73 77 81 Sep 11 Sep 17
Aug 25 6 70 75 79 Sep 10 Sep 17
Sep 2 8 62 69 74 Sep 6 Sep 14
Manitowoc
Scott Hendrickson
(920) 6834167
Aug 24 58 58 70 80 Aug 30 Sep 7
Aug 27 4 70 73 75 Sep 10 Sep 14
Aug 31 6 66 70 74 Sep 6 Sep 11
Sep 4 6 70 71 74 Sep 14 Sep 18
Sep 8 4 63 65 68 Sep 5 Sep 9
Marathon
Ken Barnett
(715) 2611231
Aug 25 5 64 68 72 Aug 27 Sep 3
Aug 26 3 64 65 66 Aug 24 Aug 26
Sep 1 5 60 66 72 Aug 28 Sep 9
Ozaukee
Mike Ballweg
(920) 4675740
Aug 31 3 76 78 79 Sep 23 Sep 26
Sep 8 3 72 73 73 Sep 22 Sep 24
Shawano
Joe Stallato
(715) 5266136
Aug 27 20 62 68 78 Aug 29 Sep 6
Sheboygan
Mike Ballweg
(920) 4675740
Aug 31 5 76 77 79 Sep 23 Sep 26
Sep 8 4 69 73 78 Sep 19 Sep 27
Washington
Mike Ballweg
(920) 4675740
Aug 31 3 80 82 83 Oct 1 Oct 4
Sep 8 3 74 78 81 Sep 29 Oct 6
Waukesha
Matt Hanson
(920) 6747295
Aug 21 4 82 83 85 Sep 24 Sep 27
Aug 25 4 73 78 82 Sep 16 Sep 24
Sep 1 4 69 73 76 Sep 14 Sep 20
Waupaca
Greg Blonde
(715) 2586230
Aug 27 31 65 69 78 Sep 1 Sep 7
Predicted harvest date (@ 65% moisture) is calculated using an average silage dry-down rate of 0.5% per day during September. Rate is affected by environmental conditions. The range in dates is the average + one standard deviation. The accuracy of the predicted harvest date will improve as sample date progresses.

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