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    Corn Blend Study – AgriFacts

    4.5 BU/AC

    Increased yield with K-Mag

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    Objective

    Evaluate corn yield response to MOP (0-0-60) and K-Mag® Premium (0-0-21.5-10.5Mg-21S).

    Overview

    • Muriate of Potash (MOP) is a common potassium (K) fertilizer used in corn production.
    • Higher corn yields combined with lower atmospheric sulfur deposition has accelerated the need for sulfur (S) on corn.
    • Soluble magnesium (Mg) has been documented to improve photosynthesis, enzyme activation, and grain yield.
    • K-Mag® is a unique 3-in-1 nutrient source that features low chloride, water soluble nutrients, and does not affect soil pH; regardless of rate.

    Trial Details

    Locations and Crop Management:

    CROP: Corn (Zea mays)

    YEARS: 2018-2019

    DATA SOURCE: Field studies conducted by third-party, independent researchers.

    EXPERIMENTAL DESIGN: Small-plot RCBD with 4 replications.

    CROPPING CONDITIONS:

    Locations: 23 trials across the following states – DE, IL, IN, KY, MIS, NC, OH, PA, SC, WI

    N Rate: Applied according to local recommendations

    P Rate: 80 lbs P₂O₅/ac applied as DAP (18-46-0) or MAP (11-52-0)

    K Rate: 60 lbs K₂O/ac as either MOP or a blend of MOP (50 lbs K₂O/ac) + K-Mag® (10 lbs K₂O/ac)

    Application Timing: Preplant

    Application Method: Broadcast Incorporated


    Results


    Summary

      • Replacing a small amount of MOP with K-Mag® increased corn yield by 4.5 bu/ac over MOP when averaged across 23 trials (2018 and 2019).
      • These results demonstrate the value of K, Mg, and S for current yield levels and corn production systems.
      • Access additional yield data, ROI calculators, and resources at K-Mag – Performance.