Sulphur stones isolated

Crop Nutrition

Typical Sulfur Recommendations by Crop/Region

Robert Mullen, Ph.D.

Robert Mullen

Robert Mullen, Ph.D.


Director of Agronomy

To say Dr. Robert Mullen is passionate about agriculture would be an understatement. He holds a Bachelor of Science degree in ag business from Cameron University, along with a Master of Science degree in plant and soil science and a Ph.D. in soil science from Oklahoma State University. In addition, Dr. Mullen has been published in a variety of scientific and trade journals. But it’s not just his academic accomplishments that make him unique. It’s his unwavering ability to take complex data and — in simple terms — explain how it impacts a farmer’s bottom line. Dr. Mullen delivers the kind of insightful observations that can lead to a more profitable business. As a leading agronomy expert, Dr. Mullen has a goal to further educate farmers on best management practices that improve their yields and maximize their return on investment.

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If you have been paying attention the last few years, there are more and more reports of sulfur response across a broad range of crops throughout North America. In fact, we have been highlighting some of that research on the eKonomics site (Iowa, Midwest, Western Canada). One specific piece we have not highlighted is sulfur recommendations based upon state/province and crop. To address that, below are the recommendations for various crops in specific states/provinces. The rates provided are not to be applied universally within the geography listed; universities/governmental entities provide additional guidelines associated with these rates. If you want more information about the guidelines, please follow the links to the published university/governmental documents.