September 21, 2016 Weekly Crop & Weather Update

This update is also available in a print-friendly pdf format: September 21, 2016 Weekly Crop & Weather Update

Below you will find the daily maximum and minimum air temperatures, growing degree units (GDUs), and 24-hour precipitation amounts for this week. These values are recorded at 8 AM and reflect the conditions for the previous 24-hour period (8 AM to 8 AM) at the Southern Research & Outreach Center, Waseca.

Air Temp (oF) Precip
Date Max Min GDUs (inches)
Thursday, 9/15 75 50 12.5 -
Friday, 9/16 78 60 19.0 0.99
Saturday, 9/17 80 55 17.5 -
Sunday, 9/18 73 54 13.5 -
Monday, 9/19 85 58 21.5 T
Tuesday, 9/20 83 54 18.5 T
Wednesday, 9/21 85 57 21.0 2.52

The warm and wet conditions we have endured most of this season persisted for yet another week in the Waseca area.  This is the sixth time in the last nine weeks that we have received more than 2-inches of rain.  Temperature averaged 67.6 degrees or 7.3 degrees warmer than normal.  Rainfall totaled 3.51 inches which is 2.57 inches above normal.  Growing degree units (GDUs) totaled 123.5 or 65% more than normal.  Since May 1 we have now accumulated 2712.5 GDUs, 12% more than normal.

Last year this week was warm but not quite as wet.  Temperature averaged 66.0 degrees and 1.20 inches of rain fell.  Last year at this time we had accumulated 2448 GDUs.

Corn and soybeans are at or near maturity and we would be discussing results of some of the early harvested fields but conditions do not allow harvest machinery to enter fields.  The extra heat this season has moved corn along quickly.  Hand samples of corn planted in mid-April showed that a 104 day hybrid was 29% moisture and 90 to 95 day hybrids were about 22% moisture.  A 109 day hybrid was still not quite mature.  Hand harvest corn samples measuring yield indicated corn yields similar to last year.  Soybeans respond more to day length than heat and are maturing a little slower than corn.  Neither crop is using much water this time of year so dry weather is all we can hope for to dry fields out to get a start on harvest.