Black Layer Projections

Field Rep Blog
September 17, 2014
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September 15, 2014 This cold snap we just shivered through really knocked my maturity date projections.  We gained less than 15 heat units in 4 days, which put us behind the 10-year average and significantly behind last year.  Those 4 cold days basically backed up black layer by 5 to 7 days.  We gave up all the […]

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Approaching the Finish Line

Field Rep Blog
September 8, 2014
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September 8, 2014—  Here is this week’s update for black layer projections.  The weather this past week gained us another day in black layer projections (see following chart). My projections for black layer for a 112-day hybrid (2,800 Heat Units) are for the following planting dates: May 1 = September 29 May 10 = October 3 May 20 = October […]

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Black Layer Projections Shorten

Field Rep Blog
September 2, 2014
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September 2, 2014—  Here is this week’s update for corn maturity projections.  With warmer than average weather for the end of August, my projections moved ahead several days.  Northern Illinois is now about 30 heat units ahead of the 10-year average, and just slightly ahead of the 2013 crop year.  (This past week last year was very […]

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Maturity Projections for Northern Illinois

Field Rep Blog
August 26, 2014
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August 23, 2014—  To date, we have accumulated just over 2,300 heat units for the entire year, with August 22nd being the largest daily accumulation of heat units for 2014.  This pulled 2014 about a day ahead of 2013, and half a day behind the 10-year average. My projections for black layer for a 112-day […]

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The Latest Observations From the Field

Field Rep Blog
July 29, 2014
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July 28, 2014—Over the past week, the dry weather has released some soil nitrogen, significantly improving (deepening) the corn’s color. Nitrate levels in the soil have made a slight recovery, especially CoS.  I am now seeing dark green next to yellow portions of leaves which indicates a flush of new nitrogen into the plant.  Ten […]

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Test Results For Samples Pulled July 7, 2014

Field Rep Blog
July 16, 2014
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July 16, 2014—Nitrate Tests for our four northern plots have now all crashed.  There are three sources of N for the plant today: Nitrates, Ammonium N, and N mineralized from the soil.  Today, the Nitrates are effectively zero, the ammonium N is not in much better shape, and the mineralization process has greatly slowed with all […]

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Nitrate Testing 4-29-2014

Field Rep Blog
April 30, 2014
Rick Griesbach explaining root system

Here is my first nitrate report for the 2014 growing season.  Today I will explain my nitrate testing protocol and give the results for the first three weeks of tests. Nitrate Testing I have four sites selected where I will pull two soil nitrate tests at 0 to 12 inches, and 12 to 24 inches on a […]

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