Read answers to your top agronomic questions. Download the 2023 Product Agronomy Research (PAR) Report HERE.

Back to Articles

Corn Drydown Update 2022

BY Dairyland Seed Agronomy Team

We took a comprehensive look at this topic in our Corn Drydown and Maturity article from October 5th, but since wet corn is a hot topic let’s do a quick status check for 2022. First, let’s review anticipated drydown rates

Drying Rates per Day: Iowa State University agronomists have found that drying rates early in the season will be close to 0.7 points per day and closer to 0.4 points per day later season(link). They also note little drydown through November. University of Wisconsin agronomists observed 0.76-0.92% during warm weather and 0.32-0.35% when cooler (link).

GDUs per Point of Moisture Loss: The same University of Wisconsin source states that drying grain from 30% to 25% requires 30 GDUs per point of moisture, and 45 GDUs per point to get from 25% to 20%. It makes sense that dryer grain is more difficult to dry. However, they also found that to dry 1 point on average, 20-22 GDUs are required in cool wet weather and 24-29 GDUs are required in warm weather. That’s right, GDUs are more efficiently used during cool wet weather! Of course, it still takes more days to dry in cooler weather. This may or may not be intuitive to you, but if its anything like fuel efficiency on the interstate; slower is a little better!

Outlook: We just experienced a 7-10 day stretch of favorable harvest and drydown weather across much of the Midwest. High temperatures pushing 80 and lows in the mid-50s have been delivering 15-20 GDUs each day, moving moisture 5% or more last week. A quick weather forecast survey of the Dairyland Seed footprint shows that most of us will experience 3-10 GDUs each day for the next 10 days. That could be about 3-4% of drying over that stretch. Hopefully this gets you to a satisfactory moisture level. If not, remember that while 15% corn might be best for your dryer bill, 25% corn is ideal for minimizing harvest losses.


 

Brian Weller Dan Ritter Branden Furseth Mark Gibson Amanda Goffnett
Brian Weller
Western Region
507.456.3034
Dan Ritter
Central Region
219.863.0583
Branden Furseth
Northern Region
608.513.4265
Mark Gibson
Eastern Region
260.330.8968
Amanda Goffnett
Eastern Region
989.400.3793
Enjoying our Agronomy Updates? Suggestions for topics you'd like us to weigh in on? Drop us an email at dairylandseed@dairylandseed.com. We'd love to hear from you!
Subscribe for more insights delivered straight to your inbox.
You may also like...
  • Rodent Control for Seed Storage Areas
    It is hard to believe, but it’s time to start shipping seed for the 2025 growing season.  As you receive your seed into your storage facilities, rodent control will be one of the more important tasks to ensure safe seed storage.
    Read more
  • Protect Your Soybean Yield with Seed Treatments
    Farmers often ask the Dairyland Seed Agronomy Team if treated soybeans are worth the investment. It’s a good question, especially when deciding on seed varieties for the 2025 growing season. With rising input costs and tight margins, treating soybeans should be considered a critical capital investment for the 2025 program.
    Read more
  • Interpreting Yield Data of Seed Products in 2024
    Yield reports are very strong so far this year. Who would have thought that to be the case after such a dry summer? Despite overall strength, we are still picking up on a level of variability that one
    Read more
Find Your Rep