Muriate of Potash (MOP) is a common potassium (K) fertilizer used in corn production.
Higher corn yields combined with lower atmospheric sulfur (S) deposition has accelerated the need for S on corn.
Soluble magnesium (Mg) has been documented to improve photosynthesis, enzyme activation, root growth 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 application rate.
Crop: Corn (Zea mays)
Locations: 29 trials across the following states - IL, IN, KY, MS, NC, OH, PA, SC, WI
Data Source: Field studies conducted by third-party, independent researchers.
Experimental Design: Small-plot RCBD with 4 replications.
Cropping Conditions: All trials conformed to local cropping practices.
Treatment (Trmnt) / Rates / Timing:
N Rate: Applied acccording 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 applied 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
Addition of MOP increased corn yield 3.9 bu/ac compared to the control (N+P).
Replacing a small amount of MOP with K-Mag increased corn yield by 5.6 bu/ac over MOP averaged across 29 trials (2018 – 2020).
These results demonstrate the value of K, Mg, and S for current yield levels and corn production systems.
Access additional yield data, technical information, and resources at KMag.com/Performance