A policy change to more accurate terminology for fertilizers: P and K plant nutrient reporting changes to elemental basis

Future publications and other communications of the University of California will report amounts or percentages of a plant nutrient (whether in the plant, in the soil or in a fertilizer) in terms of the chemical element itself. This policy, aimed at simplification and the use of less confusing terminology, follows a similar official change by the American Society of Agronomy and a growing trend in publications of other states as well as within the fertilizer industry.