820303_Application Window Extension_20200501

Application Window Extension for WCW Farm(Facility#82-303)
Facility#82-303 is utilizing corn as a receiving crop for waste application.The corn was planted
May 1, 2020 and is determined to be in Growth Stage V15 as of June 26, 2020.With the corn.
being in a vegetative growth stage the crop is still receptive to Nitrogen applications through
swine effluent. Knowing that the corn plant requires approximately 48 GDUs to reach the next
growth stage, by July 1 this crop will only be at growth stage V17-18 and still in a vegetative
stage. Corn can see a yield response to Nitrogen applications up and until growth stage R3,
which occurs approximately 91-98 days after seeding.
The corn plant can utilize approximately 50%of its total Nitrogen during the remaining growth
stages as indicated above. Knowing that the application fields on this farm have a maximum
PAN amount of: Pivot 1-128 lbs N/a, Pivot 2—115 lbs N/a,and Reel pulls—111 lbs/a we could
expect the corn to utilize the following amounts of Nitrogen during the remaining growth
stages.
Pivot 1—64 lbs N/a
Pivot 2—57 lbs N/a
Reel Pulls—55 lbs N/a
Knowing these facts about the corn at WCW Farm, I would recommend extending the
application window on this corn crop until July 31, 2020 or until the maximum amount of
Nitrogen has been applied to the application fields.
Todd Rowe, CCA