OVERVIEW
- MOP is commonly used as a potassium (K) source in soybean production.
- Micronutrients such as boron (B) are essential for plant growth, yet often overlooked in balanced crop nutrition.
- Granular B products can be blended with K, but application of these blends leads to undesirable B distribution.
- Additionally, boron is mobile in the soil and can leach beyond root systems under certain conditions.
- Aspire® is a premium potash that uses Nutriform® technology to combine potash along with two forms of boron (fast and slow release) in every granule. This combination delivers B for uptake throughout the season, and provides a more flexible application window compared to other B sources.
TRIAL DETAILS
Crop: Soybean (Glycine max)
Years: 2016–2017
Data Source: Field studies conducted by third-party, independent researchers.
Experimental Design: Small-plot RCBD with 4 replications.
Cropping Conditions:
P Rate: 40 lbs P₂O₅/ac applied as MicroEssentials® S10® across entire trial
K Rate: 60 lbs K₂O/ac applied as MOP or Aspire®
B Rate: 0.5 lb B/ac applied as Granular B or Aspire®
Application Timing: Preplant
Application Method: Broadcast incorporated
RESULTS
SUMMARY
- Soybean yields increased with the addition of potassium and boron.
- The addition of MOP + Granular B increased yields by 1.8 bu/ac.
- Aspire® demonstrated a +2.0 bu/ac response over the MOP + Granular B and a +3.8 bu/ac response over the Control (No K).
- This study demonstrated that when a foundational rate of phosphorus and sulfur is provided by MicroEssentials® S10®, additional yield can be achieved with potassium and boron applications; especially with Aspire® and Nutriform® technology.
