2017 Summer Tour Dates  04/19/17 10:23:30 AM

 
I KNOW that it is mid April and many are in the middle of corn planting.  So, plot tours are something not on many people’s minds yet.  However, below you will find the 2017 Summer Field Tour Dates for our plot West of Mynard.  The process will be much as it has been in the previous years.  We have the tours RAIN OR SHINE—If raining--we will gather in our seed building—If the sun is shining--at our plot on the West side of Mynard Nebraska—1 mile South of our plant—1/4 west on Mynard Road OR 1-1/4 mile West of HWY 75 on Mynard Road—South Side of the Road.   The tours will last no longer than 1.5 hours and address any current agronomic issues as well as allow the attendees to monitor developmental progress of Asgrow and Dekalb genetics throughout the growing season.  View the current genetic lineup as well as population trials, planting speed trials, fungicide and insecticide seed treatment comparisons, biological seed treatments, the affects of starter fertilizers and more!   The May 16th date is a bit weather dependent—we will have to see if planting is completed!!
 
2017 Mynard Tour Dates
Date                            Location                      Time                            Guest Speakers/Topic
Tuesday May16th       Mynard Plot                9-10:30 a.m.                Tim Mundorf_Midwest Labs—Post-emergence
Fertility Observations
Post-emergence Weed Control Options
Tuesday May 30th       Mynard Plot                9-10:30 a.m.               
Tuesday June 13th       Mynard Plot                9-10:30 a.m.   
Tuesday June 27th       Mynard Plot                9-10:30 a.m.               
Tuesday July 11th        Mynard Plot                9-10:30 a.m.
Tuesday July 25th        Mynard Plot                9-10:30 a.m.
August 2nd-6th              Springfield                                                      Sarpy Co. Fair
Tuesday August 8th     Mynard Plot                9-10:30 a.m.
August 9th-12th            Cass Co. Fairgrounds                                      Cass Co. Fair
Tuesday August 22nd  Mynard Plot                9-10:30 a.m.                Corn Breeder/Corn Lineup
                                                                                                            Soybean Breeder/Soybean Lineup
Tuesday August 29th   Cass Co. Fairgrounds                                      Late Summer Clinic
 
Rain graced most of Eastern Nebraska this week.   Some people have planted some corn.  Not many folks are done, while others have a day or two left to complete corn planting.  All areas of Eastern Nebraska now have consistent soil temperatures at or above 50 degrees, which support corn germination.  Early planted corn growth has been slow which brings up some cool weather emergence issues.  Corn planted on April  8th is just in the spike stage to first leaf stage as we have just accumulated enough GDD's for emergence.
GDD (Growing Degree Day) requirements of a hybrid reflect the number of heat units needed to reach maturity. On a day when the high 75 and low is 50 you have acquired 12.5 GDD’s. A day with a high of 90 and low of 70 would gain 30 GDD’s.  To figure the GDD of any day add the daily high to the daily low and divide by 2 and then subtract a base temperature of 50 which then will equal the number of GDD’s acquired that day. Relative maturity (confusing term) is a reflection of the average number of calendar days required to reach the GDD’s required to develop physiological maturity (black layer). Here is where it gets tricky.
 
Why does an 113 day hybrid with a 2800 GDD requirement need 142 calendar days to mature?  Here is an example
 
On average we acquire around 20 GDD’s per day here in Eastern Nebraska during the summer months. We need daily highs of 85 and lows 55 to gain 20 GDD’s per day.  A 2800 GDD hybrid (113 Relative Maturity) planted in Eastern Nebraska on April 25th would on average mature in 142 calendar days—Sept 14th.  For it to mature in 113 days—August 16th, you have to average 25 GDD’s per day (high temperature of 90/low temperature of 60), every day for 113 straight days.  NOT LIKELY!  It usually takes about 142 days—Sept. 14th to reach this point with 113 day hybrid.  
 
 

 
 
 
John W. McNamara
Agronomist
Wiles Bros. Inc.
606 Wiles Road
Plattsmouth NE. 68048
(402) 298-8550--Office
(402) 499-3870--Cell
(402) 298-7174--Fax
 
 
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