This webinar will discuss the role of phosphate and potassium in crops and how plants acquire these nutrients from the soil. It will also review the idea of fertilizer use efficiency, which is a measure of how much of a nutrient is taken up by a crop versus the total amount of that nutrient applied to the crop field. As an extension of this topic, this webinar will elaborate (i) on the forces that reduce the uptake efficiency of phosphate and potassium, (ii) on how to measure and manage these reductions, and (iii) on the steps producers might take to improve fertilizer use efficiency moving forward.