T-kitty, did your soil test actually mention a shortage of N, or did it not include nitrogen in the test? The reason I ask is most soil tests don't include it because it is so soluble and variable, depending on soil types, temperature, time of year, etc. As for Ironite it is very low in N and in most cases tends to play a cosmetic role, normally used to green up foliage but not contributing to foliage growth.
Keep in mind also that compost/leaves/yard waste tends to offer phosphorus as well so you may want to use it sparingly.
Oh yeh, what pH did your soil test show?
Shoe