OVERVIEW
- 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.
TRIAL DETAILS
Locations and Crop Management:
Crop: Corn (Zea mays)
Years: 2018-2020
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.
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:
- 2018-2021: 60 lbs K₂O/ac applied as either MOP or a blend of MOP (50 lbs K₂O/ac) + K-Mag (10 lbs K₂O/ac)
- 2022: 50 lbs K₂O/ac applied as either MOP or a blend of MOP (40 lbs K₂O/ac) + K-Mag (10 lbs K₂O/ac)
Application Timing: Preplant
Application Method: Broadcast Incorporated
Locations: 46 trials across the following states -IA, IL, IN, KS, KY, MN, MS, NC, ND, NE, OH, PA, SC, SD, WI
RESULTS
SUMMARY
- Addition of MOP increased corn yield 4.9 bu/ac compared to the control (N+P).
- Replacing a small amount of MOP with K-Mag increased corn yield by 5.2 bu/ac over MOP averaged across 46 trials (2018 – 2022).
- 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
