Manure, although that wioll takes some time to become available.
Blood meal, very water soluble and readily avaialable.
Cottonseed meal, if you are not too concerned about residual pesticides.
Corn Gluten Meal, the stuff sold as a preemergent plant growth suppressor that also has a pretty high amount of available Nitrogen.
Fish fertilizers and seaweed products.

thanks for speedy response,i have horses and plenty of aged manure handy. i tilled i thought plenty in this spring,but the plants don't seem to be growing as strong as my neighbors. i'm sure they're going with chemicals and guess i have some corn envy going on.

You could also use an organic fertilizer, such as Fertrell's Super N...Ann

I would use a teeny bit of caution with the timeing of any fish emulsion application. Fish emulsion attracts raccoons. If you are growing sweet corn, you know what happens when raccoons find the sweet corn.

Apply it now while there are no ears in sight, then use one of the other options later in the season. Or put up an electric fence.

thanks so much for all the good info,i have three big ole farm dogs that love to sleep on the fringes of the garden,guess the bare dirt is cooler? haven't seen a sign of coons(yet).found a dealer for the fertrell's near me too! thanks again.