What is the correct OPM formula?

The correct formula for OPM (Output per Minute) is accurately represented in the chosen answer. This formula takes into account several important variables: GPA (Grit Per Acre), MPH (Miles Per Hour), Spacing (the distance between application patterns), and incorporates a constant to ensure that the result is represented in a standardized unit.

In this case, multiplying the GPA, MPH, and Spacing together provides a comprehensive measure of the output based on the operational conditions of fertilizer application. The number "32" in the numerator adjusts the equation to account for the specific conditions of application, while the division by "1,485" serves as a conversion factor to scale the result appropriately.

Understanding this formula is vital for those within the fertilizer application industry as it allows practitioners to calculate the effectiveness and efficiency of their application methods, ensuring that the fertilizer is applied correctly per minute, which is crucial for both crop health and environmental considerations.