Experiment Info 2013
Row Spacing: 30”
Previous Crop: Soybeans
Plot Size: 15’ x 210’
Potash: Fall 2012
PPI: 5/2, 5/6
Soil Test Values(ppm):
% OM: 3.4
Bicarb P: 17
% K: 2.3
% Mg: 21.4
% Ca: 75.9
% Na: 0.4
Evaluate the long-term yield effects of the different AgroLiquid program components. In the spring of 2011 a long-term study was developed to compare the influence of fertilizer components on overall fertilizer programs. A yield goal of 175 bu/A corn was established (However, actual corn yields have far exceeded the original goal.) Following a soil test, a recommendation of 180-30-60-2 Zn was developed. Three fertilizer treatments were developed
and compared to a nitrogen only treatment.
- 3 gal/A Pro-Germ. + 5 gal/A Sure-K + 2 qt/A Micro 500
- 5 gal/A Sure-K + 2 qt/A Micro 500
- 3 gal/A Pro-Germ. + 2 qt/A Micro 500
These treatments were applied in-furrow at planting and were all sidedressed with 47 gal/A 28% + eNhance. These treatments are part of the long-term “permanent” plot study, therefore all treatments remain in the same location from year to year. A summary of the first three years of yield results appear on the table below.
• All treatments including the nitrogen only, exceeded the 175 bu/A yield goal. The location of this experiment is a highly productive soil, knowing the yield potential, recommendations may have changed. However, this being a long term study, rates will remain the same to compare changes in yield and soil test based on fertilizer programs.
• Of the planter fertilizer treatments, lowest yield average is the program containing just Sure-K and Micro 500, yielding almost 7 bu/A less than the Pro-Germinator only treatment.
• The treatment with Pro-Germinator and Micro 500 has a three year average yield increase of over 15 bu/A. Even in these higher phosphorus soils, there is great benefit to Pro-Germinator and Micro 500 applied in-furrow.
• Highest yield was achieved with the complete fertilizer program with a three year yield average of 215 bu/A, this is over a 20 bu/A yield increase over the nitrogen only treatment. This demonstrates the importance of a complete fertilizer program and its effects on corn yield.