I would be careful about planting directly over banded full-shot (120 units?) of urea placed by a knife. The knife leaves a straight path for the roots right down to a very hot concentrated band of urea which may or may not be in close contact with soil particles. The knife may also leave air pockets directly under the seed in some wetter heavier soils which does not close quickly.

With our Pluribus unit we have many customers doing this - 100-140 units N as urea in the strip ahead of planting because the urea is dispersed thru a strip 8-10" wide x 5-6" deep with maybe a 2" high mound on top - sort of like sausage. But it is very different from banding with a knife.

The thing that makes urea safe to the plant is it being in contact with a moist soil particle. IF the soil is wet enough you may get away with it or if you go deep enough but if the N is that deep what is going to feed the roots to get down to it and when. jmho and experience.

Jim at Dawn