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Northern Illinois Agriculture

University of Illinois Extension
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Early or late planted beans, who has the yield advantage in 2012?

Posted by Russel Higgins - Soybeans

One of the recent questions asked, will the later planted soybean out-yield the earlier planted in 2012, benefiting from our late season rains. Our NIARC date of planting study for soybean in 2012 had the following planting dates.

  • April 24th
  • May 11th
  • May 22th
  • June 6th

As of yesterday the June 6th planted beans were still green, the remaining three planting dates had lost all or most of the photosynthetic capability.

Summarizing soybean date of planting research at the NIARC from 2010 and 2011, we can fit a pretty good line showing earlier planting dates resulted in a yield advantage. This consistent yield advantage has resulted in the University of Illinois to pushing its suggested planting dates for soybean earlier in the season if conditions are favorable. We will see if this holds true for 2012.

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