Agreement expands access to RhizoSorb® 8-39-0, giving more farmers an option to lower phosphate costs and improve returns per acre

STATE COLLEGE, Pa.--(BUSINESS WIRE)--November 9, 2026--

As farmers look for ways to manage input costs without compromising yields, Koch Agronomic Services (KAS) and Phospholutions, Inc. today announced a new agreement to expand access to RhizoSorb® 8-39-0, a more efficient phosphate fertilizer.

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This agreement builds on KAS's commitment to improving nutrient use efficiency through its portfolio of plant nutrition technologies. RhizoSorb 8-39-0 offers a differentiated approach as an enhanced-efficiency granular fertilizer, giving growers an option to adjust their phosphorus fertility program. Its mineral-based technology controls phosphorus release from within the fertilizer granule, keeping more applied phosphorus available for crop uptake rather than becoming tied up in the soil.

“Improving nutrient efficiency is a key part of how we help growers get more value from their fertilizer investments,” said Dr. Ryan Bond, vice president of innovation, business development and agronomy for KAS. “RhizoSorb is a strong fit for our portfolio because it brings that efficiency directly to phosphate fertilizer. We're pleased to work with Phospholutions to bring this technology to more retailers and the growers they serve.”

The performance of RhizoSorb has been tested across more than 700 research and on-farm trials, which have demonstrated the product’s ability to maintain or improve yields with up to 50% less applied phosphorus compared with standard grower practices across various crops, soils, and growing conditions. By maintaining crop performance while reducing phosphate fertilizer costs, RhizoSorb can improve return on investment.

RhizoSorb fits into existing fertility programs and can be blended and applied using standard dry fertilizer equipment. The product was commercially adopted on more than one million acres in the United States and Canada during the 2026 crop year.

“Farmers should not have to choose between lowering phosphate costs and protecting yield,” said Hunter Swisher, founder and CEO of Phospholutions. “RhizoSorb gives them a more efficient phosphate fertilizer that delivers on both. KAS brings deep agronomic expertise and strong relationships with the retailers growers rely on, helping us make that option available to more farmers.”

KAS will immediately begin offering RhizoSorb in select geographies and will have the product available for application in 2027. For more information about RhizoSorb availability, growers and retailers can contact their local KAS representative.

About Koch Agronomic Services, LLC
Koch Agronomic Services, LLC and its affiliates produce and market a proven and expanding global portfolio of plant performance technologies for agriculture producers. With a commitment to creating real, sustainable, long-term value for customers and society, Koch Agronomic Services, LLC focuses on developing customer-driven solutions to maximize plant performance and minimize environmental impact. Koch Agronomic Services, LLC is a subsidiary of Koch Ag & Energy Solutions, LLC. kochagronomicservices.com

About Phospholutions, Inc.
Phospholutions is an agricultural technology company founded in 2016 in State College, Pennsylvania, focused on improving the use of phosphorus in crop production. Its patented technology RhizoSorb® helps crops use phosphorus fertilizer more efficiently, allowing farmers to maintain yields with lower input costs and without changing farming practices or equipment. Backed by decades of university research, 11 patent families, and extensive field testing, Phospholutions helps make phosphorus use more efficient and predictable, supporting farm profitability and long-term food security. phospholutions.com

Media Contacts
Koch Agronomic Services: Dorothy Tate, dorothy.tate@kochind.com, 316-828-1589
Phospholutions: Julia Andrus, jandrus@phospholutions.com, 814-954-7047