Atrazine Use in Kansas: Balancing Crop Production and Environmental Stewardship

Atrazine has long been a cornerstone herbicide for Kansas farmers, particularly in corn and grain sorghum production. Its effectiveness and affordability make it one of the most widely used weed-control tools across the state.

To better understand its role and impact, I spoke with Sarah Lancaster, K-State Extension Specialist, who emphasized just how vital Atrazine remains to our production systems.

The Challenge: Atrazine and Runoff

While Atrazine is essential, it does come with challenges. Because it breaks down slowly in soil and is moderately soluble in water, Atrazine can move with runoff during the first major storm of the season. This mobility raises concerns about water quality and long-term soil health.

Recommendations for Farmers

Lancaster shared several strategies to help farmers keep Atrazine where it’s needed most—in the soil:

• Time applications carefully: Apply Atrazine during periods when significant rainfall is less likely.

• Reduce runoff and erosion: Conservation practices such as cover crops, terraces, or buffer strips can help limit herbicide movement.

• Consider tillage in some cases: Though it may sound counterintuitive, Lancaster noted that tillage can sometimes help by moving Atrazine deeper into the soil profile—closer to germinating seeds and away from the soil surface.

Stewardship and Sustainability

While Atrazine runoff can be a concern, Lancaster stressed that good land management practices can significantly reduce risks.

Final Thoughts

Atrazine will likely remain a critical tool for Kansas farmers. With careful application and a commitment to soil conservation, producers can strike a balance between productivity and sustainability.