About DARTT
At DARTT Agri-Services, we believe the best solutions start in the soil, and with the people who know it best. We're not just dealers—we're farmers, agronomists, and problem-solvers who are deeply invested in helping growers achieve greater results through tested, field-proven biological solutions.
Founded in Fall 2024, DARTT Agri-Services emerged from a shared passion between three seasoned agricultural professionals: Tim Sass, John Stubbendick, and Rodger Menn. With complementary backgrounds across seed, agronomy, and equipment, the DARTT team brings a unique perspective to the challenges and opportunities farmers face today.
Rodger Menn
tim
Sass
John Stubbendick
Our Team
We test every product on our own acres first.
We use precision tools like Agronomy 365 for smarter recommendations.
We focus on relationships—not just transactions.
We offer seasonal insights, strategy, and boots-on-the-ground guidance.
Whether you're new to biologicals or looking to sharpen your current approach, DARTT is here to help simplify the journey, increase your profitability, and walk alongside you every step of the way.
What Sets DARTT Apart?
A graduate of South Dakota State University, John specializes in agronomics and Precision Ag Technology. As a young farmer in Otoe County, NE, he combines cutting-edge data analysis with boots-on-the-ground insight to help growers make informed, profitable decisions. John leads DARTT’s use of Agronomy 365—a soil and tissue sampling platform that guides highly customized BW Fusion product recommendations.
John Stubbendick
Agronomist | Solutions Specialist
With over 25 years as a seedsman and 40 years of farming experience, Tim brings unmatched depth and practical insight to the team. His work ensures every recommendation is rooted in long-term success and soil health.
Tim
Sass
Partner | Seedsman & Grower
Rodger brings 45+ years of experience in the agricultural equipment industry and a deep understanding of row-crop operations. He’s passionate about bringing innovative solutions to growers that increase efficiency and drive ROI.
Rodger Menn
Partner | Grower & Entrepreneur
What began as three friends exploring how biologicals could elevate their own yields has grown into a service-first ag business grounded in results. DARTT Agri-Services became a BW Fusion dealer not through a sales pitch, but through in-the-field testing on their own land. Today, that same hands-on approach drives how they support other growers.
Our Origin
We founded DARTT with one purpose:
To simplify the biological product space and provide honest, transparent, research-backed recommendations for Nebraska growers.
Transparency.
We document what we apply, why we apply it, and how it performs.
Our Core Values
Local Knowledge.
Partnership.
Practicality.
We understand Nebraska soils because we farm them ourselves.
We’re committed to supporting our growers, not just selling to them.
We cut through the noise to deliver clear, actionable solutions.