In this photo a band has been placed on both sides of the potato plant. This ridge till planter also has a tube that can band a fertilizer while planting. Broadcasting fertilizer is frequently done after the crop has been harvested, in preparation for the next crop. These materials should then be incorporated by plowing to avoid water pollution by runoff. Generally, more P will be needed when broadcasting than if the fertilizer was banded.
Top dressing refers to adding fertilizer to the surface of a crop already growing.
Fertilizing established turf grass is also done with top dressing. When applying water-soluble materials, care is needed to avoid burning the turf. If fertilizer is spilled on turf, sweep it up and do not try to wash it away with water. Side dressing is often done with anhydrous ammonia. It mustl be accomplished before the crop is too high for the implements.