Corn Silage Drydown In Wisconsin During 1997

September 25, 1997 4(25):147-148

Joe Lauer, Corn Agronomist

Below are silage moisture levels for various counties in Wisconsin. These data were collected from the same spots in the field and harvested over time. Projected dates for silage harvest will change as environmental conditions influence maturity and the rate of drydown.

Table 1. Corn silage drydown in Wisconsin counties during 1997.


County

Corn hybrid
maturity rating

Sample
date
Silage moisture (%) on sample date
(Min-Ave-Max)
Rate of drydown between sample dates
(% per day)
Projected date for 65% silage moisture *
Chippewa Shorter-season
(< 95 d RM)
9/4
9/8
9/11
9/15
9/18
72-72-73
69-71-72
63-65-66
63-66-68
61-63-65
---
0.1
2.0
-0.3
1.0
9/18
9/20
Now
9/17
Now
Full-season
(> 95 d RM)
9/4
9/8
9/11
9/15
9/18
72-73-73
69-71-72
67-67-67
69-70-72
67-68-69
---
0.5
1.3
-0.8
0.7
9/20
9/20
9/15
9/25
9/24
Fond du Lac Shorter-season
(< 100 d RM)
9/9 69-71-78 --- 9/21
Full-season
(> 100 d RM)
9/9 72-75-78 --- 9/29
Jefferson Shorter-season
(< 105 d RM)
8/28
9/2
9/9
9/16
83-84-86
77-81-84
73-76-77
67-69-72
---
0.6
0.7
1.0
10/5
10/4
9/30
9/24
Full-season
(> 105 d RM)
8/28
9/2
9/9
9/16
76
75-79-85
63-73-79
61-68-72
---
---
0.9
0.7
9/19
9/30
9/25
9/22
Manitowoc Shorter-season
(< 95 d RM)
9/4
9/8
9/11
9/15
9/18
74-76-77
74-75-76
69-72-74
64-70-74
63-67-68
---
0.3
1.0
0.5
1.0
9/26
9/28
9/25
9/25
9/22
Full-season
(> 95 d RM)
9/4
9/8
9/11
9/15
9/18
72-74-76
72
69-70-70
68-70-72
66-68-69
---
---
0.7
0.0
0.7
9/22
9/22
9/21
9/25
9/24
Sheboygan, Ozaukee, Washington Shorter-season
(< 95 d RM)
9/8
9/15
79-80-82
77-80-82
---
0.0
10/8
10/15
Full-season
(> 95 d RM)
9/8
9/15
80-82-88
79-83-87
---
0.0
10/12
10/21
Waukesha Shorter-season
(< 100 d RM)
8/28
9/2
9/9
9/16
84-86-87
80-83-84
78-80-82
74-76-78
---
0.6
0.4
0.6
10/9
10/8
10/9
10/8
Full-season
(> 100 d RM)
8/28
9/2
9/9
9/16
83
77
76-78-80
70-74-78
---
---
0.0
0.6
10/3
9/26
10/5
10/4
*Projection uses average drydown rate of 0.5% per day. Rate is greatly affected by environmental conditions.

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