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.
