Common Fertilizer Calculations

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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In this webinar hosted by eKonomics, Nutrien Director of Agronomy Dr. Robert Mullen teaches common fertilizer calculations used to determine fertilizer rates, prices. Watch the presentation below for Dr. Mullen’s step-by-step process to solve each mathematical equation.

From this webinar you will learn:

  • How to calculate fertilizer rates from fertilizer labels and recommendations,
  • How to determine the price of fertilizer for a basis of comparison between products,
  • How to make fertilizer applications when blending multiple sources.

Download Dr. Mullen’s presentation