Adjusting map values for earlier planted corn

The weekly Degree Days map shows base-50° F degree day accumulations that are kept throughout the growing season beginning May 1. For corn and soybeans planted earlier, use the table to find accumulations prior to April 15, April 20, and April 25 for your area. Adjust map values throughout the season according to planting date.

Degree day accumulations the last two weeks of April were approximately 80 percent of long-term averages statewide.

Degree day accumulations before May 1, 1997

Crop reporting district April 15-May 1 April 20-May 1 April 25-May 1
Northwest 95 72 47
North central 102 78 53
Northeast 96 77 53
West central 106 73 51
Central 107 77 54
East central 108 85 60
Southwest 107 69 54
South central 101 71 55
Southeast 111 85 61

This article originally appeared on page 75 of the IC-478(10) -- May 26, 1997 issue.

Updated 05/25/1997 - 1:00pm