Nitrogen fertilizer may be banded immediately prior to seeding using all nitrogen forms, including anhydrous ammonia (82-0-0) or urea (46-0-0), provided that the fertilizer is separated from the seed. Anhydrous ammonia should be placed at least 4" below the soil surface, and ideally the crop should be seeded perpendicular to anhydrous ammonia bands. There is no need to delay seeding after application if anhydrous ammonia is placed at recommended depths, especially in moist clay soils.