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Late Planting Dates Can Whittle Down Corn Yields

May 9, 2011
By: Sara Schafer, Farm Journal Media Business and Crops Editor

What is the risk of planting corn in April versus May versus June? As the weeks continue to rush by, yield potential continues to fall.

Of course, planting dates is just one of the many yield-influencing factors for corn. Depending on the weather, pests and disease challenges throughout the growing season, later-planted corn could still yield equal to or more than early-planted corn.
 
According to an article by Purdue University’s Bob Nielsen, the estimated yield loss per day varies from about 1 bu./acre/day early in May to nearly 2 bu./acre/day by the end of May.
 
Below you’ll find the corn planting dates and yield effects for many of the Corn Belt states.
 

Iowa

Planting Date Window     Yield (bu./acre)
March 20 – April 5 186
April 5 – April 20 198
April 20 – May 5   196
May 5 – May 20 183
 
Learn more about Iowa corn planting dates.
 
 

Ohio

Planting Date Affects Yield, Percent Grain Moisture, and Test Weight of Corn Grain (Columbus, Ohio).
Planting Date (mo/day)
Percent of Maximum Yield
Percent Grain Moisture
TestWeight (lbs/bu)
4/23 - 4/29
100
20.8
55
4/30 - 5/7
99
23.7
55
5/8 - 5/14
92
24.9
55
5/22 - 5/27
87
28.2
54
5/28 - 6/4
79
35.0
51
6/23 - 6/25
52
40.0
49
 
Learn more about Ohio corn planting dates
 
 

Minnesota

(Rule of thumb for southern Minnesota)
Planting date Yield potential (%)
May 5 97
May 10 94
May 15 91
May 20 88
May 25 86
May 30 83
June 4 77
June 9 71
June 14 65
June 19 59
 
 
 

Illinois

Illinois Planting Dates 
 
  
 

Missouri

Planting date Yield potential (%)
May 1 94
May 6 92
May 11 89
May 16 86
May 21 83
May 26 80
May 31 77
June 5 75
June 10 71
June 15 65
 
 
Corn Planting Dates   large
(click to enlarge)
  
 

South Dakota

South Dakota Planting Dates
 
 
 

Other States: Find corn planting date advice and information for these states:

 
 
 
 
 

 

See Comments

RELATED TOPICS: Corn, Agronomy, Crops

 
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COMMENTS (1 Comments)

Clarence - Armstrong, IA
http://www.fairmontsentinel.com/page/content.detail/id/517414/Plant-plans-to-boost-production.html?n​av=5003

Not exactly killing demand with high corn prices just yet are we? This one plant will require 6MM bu more corn this year to do this. Will it be the only one trying?
8:44 AM May 9th
 



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