Overview
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Muriate of Potash (MOP) is a common potassium (K) fertilizer used in soybean production.
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New university research highlights the need for sulfur (S) on soybean due to higher grain yields and lower atmospheric deposition.
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Soluble magnesium (Mg) has been documented to improve photosynthesis, enzyme activation, and grain yield.
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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: Soybean (Glycine max)
YEARS: 2018-2019
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
P Rate: 40 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
Summary
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Replacing a small amount of MOP with K-Mag increased soybean yield by 2.2 bu/ac over MOP when averaged across 22 trials (2018-19).
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These results demonstrate the value of K, Mg, and S for current soybean genetics and production systems.
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Access additional yield data, ROI calculators, and resources at K-Mag – Performance.
