The Ag PhD Field Day at Hefty Farm bills itself as one of the biggest — if not the biggest — crop field days in the U.S.

Farmers Brian and Darren Hefty host the event. The brothers are the creators and on-air personalities of the nationally distributed Ag PhD radio and the Ag PhD TV shows. They also manage Hefty Seed Co.

Hefty Seed sells seed, crop protection, bulk fertilizer, and a wide variety of farm equipment and parts. parts. It has more than 45 dealers in 12 states from Washington to Arkansas, and it claims to be 8th-largest crop protection and 12th-largest seed retailer in the U.S.

Get a look at the field day by clicking through the slideshow.