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Recommendations for changing hybrid maturities.

Many questions arise when we are face with delayed planting situations. The following tables  provided by the University of Minnesota Extension Service addresses the recommendations for planting ”earlier” corn and soybean varieties.

For the most part, I agree with these tables.  Just remember that this is a recommendation for “full season” hybrids.  I typically think of full season hybrids with a R.M. of 104-107 day.  In soybeans, full season is between 2.3-2.4 R.M. 

Like every other year, we are bound to average out our rainfall and heat units.  Please don’t forget the basics of planting and do the best job you can with what we’re delt with.

Table 1. Recommended Corn Hybrid Maturities for Late Planting in Minnesota

Planting Date Relative Maturity Units Earlier Than Full Season
Prior to May 25 Plant the normal seed choices planned for the season
May 25 - May 31 Plant hybrids with maturities 5 to 7 RM units earlier
June 1 - 10  Plant hybrids with maturities 8 - 15 RM units earlier
June 11-15 Plant hybrids with maturities 15 or more RM units earlier

For soybeans, we recommend the maturities given in Table 2.

Table 2. Recommended Soybean Maturities for Late Planting in Minnesota

Planting Date Relative Maturity Units Earlier Than Full Season
Prior to June 10 Plant the varieties planned for the season
June 11-20 Plant varieties with a maturity rating of 0.5 units earlier
June 20-30 Plant varieties with a maturity rating of 1 unit earlier

Tables provided by U of M @:  http://www.extension.umn.edu/cropenews/2001/01MNCN03.htm

This entry was posted on Saturday, May 10th, 2008 at 6:58 am and is filed under Uncategorized. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

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