May 3, 2017 Weekly Crop & Weather Update

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Below you will find the daily maximum and minimum air temperatures, 2-inch soil temps, 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) Air Temp (oF) 2" Soil Temp.* 2" Soil Temp.* Growing Degree Precip
Date Max Min 2017 25-Yr Avg Units (inches)
Thursday, 4/27 43 32 46 53 - 0.01
Friday, 4/28 38 29 41 53 - -
Saturday, 4/29 49 31 43 54 - -
Sunday, 4/30 52 37 44 55 - 0.02
Monday, 5/1 46 38 44 54 0 0.95
Tuesday, 5/2 43 37 43 55 0 0.06
Wednesday, 5/3 61 39 49 55 5.5 -
*bare soil *bare soil

Mother nature had one of her mood swings this week which made for very unpleasant conditions on the farm. Temperature averaged 41.4 degrees or 11.8 degrees colder then normal. Rainfall totaled 1.04 inches which is 0.18 inch more then normal. Soil temperature at the 2-inch depth, which has been three to four degrees above normal, cooled drastically to 44 degrees or about 10 degrees colder then normal. Growing degree units (GDU) accumulations begin May 1 and this week gave us only 5.5 GDUs, about 30% of normal.

Last year this week was cool and wet but not to the extreme we saw this year. Temperature averaged 46.7 degrees. Soil temperature was 48.1 degrees and rainfall totaled 0.99 inch. Last year we accumulated 15 GDUs this week.

April was our 20th consecutive month that brought us warmer then normal temperatures. This April was three degrees warmer than normal and rainfall totaled 2.84 inches which is 0.37 inch less than normal.

The cold wet weather this week meant no field work was accomplished and no growth and development took place on crops that had been planted. I examined corn seedlings from three different planting dates today. Corn planted April 10 has begun to emerge and the tips had been nipped by frost. Corn planted on April 17 had about one-inch growth of the radicle (first root) and mesocotyl (shoot) growth of about one-quarter inch. Corn planted on April 25 had only imbibed water and made no progress toward germination. Condition of these seedlings seem to be good and normal emergence is expected for all three dates. One day of sunshine warmed soils nicely on the last day of this reporting week and continued sunny skies will help dry things out and get the crop moving again.