I cannot beleive that any one would waste their time putting dry urea on with an airplane when for the same money you could put the very best foliar applied non leaf burning nitrogen kugler XRN extended release nitrogen. Most of the dry urea will volitize it will won't find the roots before most of it is gone to the atomsphere. kugler XRN 28 % nitrogen which 72% is kugler company manufacterd product theydon't buy it from someone else as a commodity product they have propretority fomula if you have yellow corn plants you need kugler XRN 28\72. . .