Iowa Expanded Nitrogen Soil Testing Program

State officials have doubled the capacity of a free soil testing initiative for local farmers.

Updated on Sept. 21, 2026 in Agriculture

Isometric editorial illustration showing a soil sampling probe and container in rich, dark earth, representing Iowa agricultural nitrogen testing initiatives. — Iowa agricultural authorities have expanded the Nitrogen Soil Sampling Project, doubling the capacity of free nitrogen testing services for farmers across 26 additional counties. AI Illustration. Upload story photo >

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Iowa agriculture authorities have expanded the Nitrogen Soil Sampling Project to include 26 additional counties. This initiative provides farmers with free nitrogen soil testing services to help guide management decisions.

Why it matters

The program helps producers manage nitrogen application by assessing year-over-year variability in nutrient availability. The expansion follows high popularity and rapid enrollment rates since the project began.

The expanded service area now covers 22 counties in the Greater Des Moines watershed and four counties in the Middle Cedar watershed. This effort represents the first phase of a three-year program duration.

The players

Iowa agriculture officials

These state authorities oversee the administration and management of statewide agricultural testing and conservation initiatives.

The details

Farmers participate in the initiative by signing up for professional services to evaluate residual nitrogen levels in their soil. By increasing total project capacity for fall 2026, the state aims to meet the demand generated by rapid farmer interest.

The Nitrogen Soil Sampling Project launched in April 2026.
The expansion was announced during an annual meeting on September 21, 2026.
The project capacity will double for the fall 2026 season.

Market Landscape

This project expansion follows the broader goals set by the Iowa Nutrient Reduction Strategy, which promotes improved soil management practices across the state. By scaling these testing services, the program positions regional agriculture to better align with long-term soil health mandates.

Participating farmers can utilize these free services to optimize their nutrient application schedules and potentially reduce overhead costs. Growers in the 26 newly added counties should contact state agriculture offices to secure testing slots for the current fall cycle.

The takeaway

Producers looking to refine their nutrient management plans should prioritize early enrollment as program capacity remains limited. Consistent soil testing serves as a key tool for managing year-over-year variability in local crop production.