Although Harvest of Harmony is fun to watch and listen to, it is also a competition to see which community's band is best in its class.
Shortly after the parade route, bands from classes AA through D take to Grand Island's Memorial Stadium for the field competition.
Six judges score on different techniques ranging from music to marching skills.
Some schools use this as practice for a future competition, and others have the chance to try something new.
"I would say it gives them something else to work for other than what they do locally," said Grand Island Chamber of Commerce's Jill Young. "And it gives people from around the state who come to the Harvest of Harmony competition, gives them the chance to see these schools in action, not just their local hometown people who are getting to watch them, it's people from all over the state."
Twenty bands performed in Saturday's field competition, and officials say this helps the bands get stronger, especially after getting scores from seasoned judges.
NTV's own Kent Boughton emceed the event.