Twin Row Cover Crops: Customizing Equipment, Reducing Inputs and Building Soil Health

Join Practical Farmers of Iowa at the farm of Greg Keller and Kole Keller from 4 - 6 p.m. on Thursday, June 4, 2026 for a field day about interseeding twin-row cover crops with cash crops. The event will take a close look at equipment for seeding twin row cover crops and benefits to water and soil quality from cover cropping. A light meal will follow the field day. The event is free but an RSVP is appreciated. See below for more information:

Greg Keller operates Twin Row Cover Crops with his son, Kole, near Monroe, Nebraska. As a leading advocate for regenerative farming in his area, Greg uses innovative cover cropping, no-till and mindful fertility practices across his fields in addition to custom-drilling cover crops for neighboring farmers. In 2023, he was named a 4R Advocate by The Fertilizer Institute.

Recently, Greg worked with Quality Drills to design and build a 40-foot drill to seed a 7½-inch twin-row rye cover crop into standing corn stalks. The following season, he plants corn and soybeans between the rye strips. Come to his field day to see his specially designed equipment and learn strategies for cutting chemical inputs. You’ll also learn about Lower Loup Natural Resources District’s deep nitrate studies taking place on Greg’s farm.

See & Discuss

• Designing and building a new drill to meet needs
• Strategies for interseeding a twin-row rye cover crop
• Cutting herbicide passes and reducing synthetic nitrogen inputs
• Deep nitrate research with Lower Loup NRD