Injecting UAN at least 4 inches deep insures that corn roots will reach the nitrogen and is preferred to broadcast and surface-dribbling UAN solutions, according to the University of Illinois Extension.

What is the best way to sidedress corn?

Injection into the soil or dribbling the nitrogen fertilizer between rows are the best ways to sidedress because this application can reduce volatilization of urea and protect the crop from foliar damage.

What stage do you sidedress corn?

Corn takes up very little nitrogen after pollination. Thus, it is critical to apply your sidedress nitrogen application before the V8 development stage. Most research indicates that if the nitrogen application is made around the V6 stage, yield loss due to nitrogen stress is rare.