Check out that growing corn:
My brother is following in the fields applying 28% Nitrogen fertilizer on the corn. It is the main staple for corn to grow tall, green, and produce a good yield. Nitrogen is critical. The applicator has knives that cut into the ground and apply it into the soil right by the roots.
For every pound of fertilizer being applied, it is 28% actual nitrogen. The rest is water. Hence the name. It comes from the manufacturer as 32%, but it has to be watered down or it won’t mix well into the soil. Usually the dealers will water it down before it gets to the farmer.