Late Foliar Applications to Winter Wheat

Experiment Info

Planted 10/4/2011
Variety Pioneer 25W43
Population 2 mill seed/A
Previous Crop Navy beans
Plot size 15’x180’/210’/130′
Replications 5
Topdress 4/13/2011
Late Foliar 5/24/2011
Harvested 7/13/2011

 

Soil Test Values (ppm)

pH 7.5
CEC 8.3
%OM 1.6
Bicarb 7
K 70
S 12
%K 2.2
%Mg 15.5
%Ca 81.7
%H 0
%Na 0.6
Zn 1.2
Mn 3
B 0.6

Objective:

Late Foliar Applications 1
This picture was taken on May 5. The plot to the left of the stake received the Pro-Germinator + Micro 500 through the drill at planting. The plot to the right of the stake received nothing at that time. At the time, it was apparent that the plots that received the fall fertilizer had larger wheat and the plants were darker green.
 The two pictures on the left are from this experiment. The picture on the left was taken on May 5. The plot to the left of the stake received the Pro- Germinator + Micro 500 through the drill at planting. The plot to the right of the stake received nothing at that time. At the time, it was apparent that the plots that received the fall fertilizer had larger wheat and the plants were darker green. The picture on the right is during the late foliar application on May 24. There were no visible signs of wheat disease at any time before or after the applications. There was no fertilizer burn on the wheat leaves following application.
This picture was taken during the late foliar
application on May 24. There were no visible signs of wheat disease at any time before or after the applications. There was no fertilizer burn on the wheat leaves following application.

1) Evaluate the effects of a drill application of 4 gal/A of Pro-Germinator + 2 qt/A on yield of winter wheat compared to no fertilizer applied, which is the most common treatment option. (2) Evaluate the effects of a fungicide application (Quadris) at fl ag leaf (Feekes stage 10) either alone or with foliar fertilizers. (Note: all treatments received the same topdress application: 12 gal/A High NRG-N + 16 gal/A 28%+eNhance.)

Winter wheat is usually planted right after soybean harvest here in the Upper Midwest, and is usually not fertilized at that time. Later in the growing season, foliar applications of fungicides have often shown yield increases due to suppression of fungal diseases. The application of fungicides presents an excellent opportunity for the inclusion of some crop nutrition. An experiment was conducted to evaluate the above two objectives, and this was the second year of application of these treatments.

For the foliar application, spray volume was at 20 gal/A with Turbo TeeJet nozzles (TJ-03) at a pressure of 60 psi.

Treatment yields appear in the following chart.

Late Foliar Applications to Winter Wheat

Conclusions:

  • The application of the Pro-Germinator + Micro 500 at planting resulted in a signifi cant yield increase.
  • Application of Quadris, Quadris + ferti-Rain and Quadris + NResponse had a larger yield effect on the wheat that received Pro-Germinator + Micro 500 at planting. It is possible that the addition of fertilizer at planting increased yield potential. The presence of the foliar inputs was able to take advantage of wheat that was not limited by lack of nutrition in the fall, whether this was due to larger plants, or better fed.
  • The application of the planting-time fertilizer did not seem to have a major effect on the treatment that received no foliar application. There must have been a synergistic effect where the presence of both had a far greater effect than that of either input alone.

Treatment averages from the two years of this experiment appear in the following table.

                           Effect of Drill-Applied Fertilizer and Foliar Applications on Winter Wheat Yield.

North Central Research Station. 2010-2011

With Drill Fertilizer 2010 2011 2 yr  avg.
no foliar 83.7 85.9 84.8
Quadris alone 86.3 93.2 89.8
Quadris + ferti-Rain 85.5 97.6 91.6
Quadris + NResponse 88.2 98.5 93.4
Quadris +       Coron 83.9 87.2 85.6
Average: 85.5 92.5 89.0
No Drill Fertilizer
no foliar 73.6 83 78.3
Quadris alone 71.7 83.4 77.6
Quadris + ferti-Rain 81.4 84.6 83.0 Application rates in table:
Quadris + NResponse 79.2 89.3 84.3 Quadris: 8 fluid oz/A
Quadris +       Coron 81.4 85.3 83.4 NResponse and Coron: 3 gal/A
Average: 77.5 85.1 81.3 ferti-Rain: 3 gal/A (2010); 2 gal/A (2011)

 

Conclusions: 

  • There was a 7.7 Bu/A advantage per year from the application of the planter-time fertilizer (4 gal/A Pro-Germinator + 2 qt/A Micro 500).
  • Addition of ferti-Rain and NResponse to the foliar application of Quadris did result in further yield increase of wheat.

Application Options for Winter Wheat Fertilizers

Experiment Info

Planted 10/13/2010
Variety Pioneer 25W43
Population 2 mill. seed/A
Previous Crop Soybeans
Plot size 15’x290′
Replications 4
Pre Broadcast 10/13/2010
2″ growth 11/1/2010
Topdress 4/13/2011
Harvested 7/15/2011

 

Soil Test Values (ppm)

pH 7.0
CEC 11.1
%OM 3.1
Bicarb 10
K 52
S 7
%K 1.2
%Mg 22.4
%Ca 75.3
%H 0
%Na 1.1
Zn 1.1
Mn 2
B 0.7

Objective:

Compare different placement and timing options for Pro-Germinator + Sure-K and Micro 500 for effects on yield of winter wheat. Usually when conducting research plots for fertilizer effects on winter wheat, we rely on application through the drill. But in reality, most drills are not set up for liquid fertilizers. Additionally, in the Upper Midwest where wheat is planted after soybean harvest, the main concern is getting the wheat in the ground as quickly as possible for growth development and fi nishing harvest of soybeans as well as corn. So timing is also an issue. This experiment was conducted to compare four different application options of 3 gal/A Pro-Germinator + 5 gal/A Sure-K + 2 qt/A Micro 500: 1) pre-plant broadcast, 2) in-furrow through the drill, 3) in the fall after 2 inches of growth, and 4) applied  with nitrogen at topdress. The entire experiment was topdressed with 12 gal/A High NRG-N + 16 gal/A 28%+eNhance.

Treatment yields appear in the following chart.

Application Options for Winter Wheat FertilizersConclusions:

  • All fertilizer treatments resulted in a signifi cant yield increase.
  • There were no signifi cant yield differences between the fertilizer methods of application. This greatly increases fertilizer application options to time-conscious growers.

Planter Fertilizer Response and Nitrogen Comparison in Oats

Experiment Info

Planted 4/15/2011
Variety Newdak
Population 90 lbs.
Previous Crop Corn
Plot size 15’x265′
Replications 4
Topdress 5/3/2011
Harvested 8/1/2011

 

Soil Test Values (ppm)

pH 6.9
CEC 9.5
%OM 2.1
P1 10
K 112
S 7
%K 3.0
%Mg 19.5
%Ca 77.2
%H 0
%Na 0.3
Zn 1.5
Mn 10
B 0.5

The 2011 oat experiment had 2 objectives. (1) a comparison of 5 different nitrogen sources at Experiment Info: recommended rates. (2) a comparison of the effects of drill applied fertilizer on oat yield.

Objective 1:

A topdress nitrogen comparison for oats was established with these at nitrogen sources: High NRG-N, 28% + eNhance, 28% + accesS, N blend (50/50 blend of High NRG-N(43%) and 28% + eNhance (57%) by equivalent pounds), and 28% UAN. Each product was applied at the recommended equivalent rate to provide 45 lbs N/A. Those treatments applied at reduced “equivalent” rates appear with an asterisk (*) in the bar.

Planter Fertilizer Response and Nitrogen Comparison in OatsConclusions:

  • With the exception of High NRG-N, there was no statistically signifi cant difference between the recommended rates of each nitrogen sources.
  • There was over a 4 bu/A yield increase when eNhance was added to 12 gal/A of 28% UAN.
  • Addition of eNhance to the full rate of 28% UAN produced the highest yield.
  • The N blend applied at 30% rate reduction provided similar yield to the nitrogen sources and was the most efficient.

Objective 2:

Drill Fertilizer Effects on Oat Yield

North Central Research Station – 2011

No Planter Fertilizer 76.0 bu
3 gal Pro-Germinator + 2 gal Sure-K + 2 qt Micro 500 87.5 bu

Also evaluated in this study was comparing the yield effects of drill applied fertilizer on oats. Drill fertilizer was applied according to soil test and consisted of 3 gal/A Pro-Germinator + 2 gal/A Sure-K and 2 qt/A Micro 500. Fertilizer was applied through fertilizer tubes behind the seed wheel. Yields reported on the table below are averages over all nitrogen treatments.

Conclusions:

  • There was a signifi cant yield increase of over 11 bu/A from 7.5 gal/A of drill applied fertilizer.