Wheat crop
Tessenderlo Kerley

Crop Nutrition

Producer of sulfur-based specialty fertilizers for agriculture.

Products
Nitrification Inhibition Rectangle

Prevent Nitrogen Loss

Learn how by adding Thio-Sul to your liquid nitrogen blends, you can both protect against nitrogen losses as well as provide essential sulfur your crops need to thrive.

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soybean rows

Crops

Learn more about specific crop nutrition.

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Agronomist with Sprinklers

Meet Our Agronomists

Meet our highly educated and experienced agronomists who are positioned to provide growers with expert guidance and product knowledge that is specific to their location in the U.S.

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Seedling in Soil

Sustainability

Sustainability and stewardship are our business model. 

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Latest Blogs

  • Onion field

    Essential Nutrients for Onion Yield and Quality

    CaTs® is a 100% water soluble calcium with a 0-0-0-10S-6Ca analysis. CaTs applied through the irrigation system can supply the necessary calcium and sulfur at critical growth and uptake times. Onion trials conducted in the PNW have show increased yield and improved storability.

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  • Processing Tomatoes

    Drip It Like It’s Hot: A Technical Guide to Using Calcium Thiosulfate in Processing Tomatoes

    In the pursuit of maximizing yield and fruit quality in processing tomato production, nutrient management remains a cornerstone of agronomic success. Among the various inputs available to growers, calcium thiosulfate ( CaTs®) has been a valuable tool for decades—particularly when applied through drip irrigation systems. CaTs delivers essential...

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  • Almonds on a branch

    The Enigma of Potassium for Tree Nut Growers

    For almond and pistachio growers, one of the most critical, consequential, and confusing decisions when making a nutrient management plan is potassium fertilization. It’s critical, due to the importance of potassium in several physiological processes, and especially its role in maximizing nut size and total yield.

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Pivot Irrigation

For over 100 years,

Tessenderlo Kerley, Inc. has demonstrated its commitment to nurturing crop life through innovation, research, and the development of Tessenderlo Kerley fertilizers. Our diverse product portfolio addresses the challenges of modern agriculture by combining essential nutrients to improve soil health, reduce nitrogen loss, increase water infiltration and maximize nutrient uptake.

About Us