Adjust N timing = Savings?
“I try to do the best with what I have – consistently. I try to pay attention to all the details to maximize the most of it,” says Dorsey. However, the yield data shocked him. Applying N with Hagie’s Nitrogen Toolbar at the V10 stage increased yields by 11.6 bushels per acre and profits by $56.30 per acre.
After switching to a liquid N program in the last couple years, Dorsey was confident he was providing adequate N at key times for crop uptake. He splits 32% N applications by incorporating one half preplant and sidedressing the remaining N with variable-rate technology.
Dorsey’s trial had these five different treatments, all with 112 pounds of N applied preplant:
Dorsey used the Nitrogen Toolbar to mimic his normal V4 to V5 stage rates at the V10 stage to evaluate if sidedressing between the V4 to V5 stage was the correct timing.
The trial is in a block system consisting of four repetitions, taking an average of 30 acres per field. The results are the average of two hybrids at two locations.
“A lot of producers put N on upfront. It’s a huge risk,” says Webster. His concern is that most farmers don’t even realize the amount of N they lose before the crop has a chance to tap into it.
Since the late-season application is a completely different practice than he uses, it gave him the opportunity to see if the method was viable for his operation. The $56.30 difference left Dorsey considering how he could reach the next level with his N program.