Aspire^® Soybean Fall vs Spring Broadcast – AgriFacts

OVERVIEW

• Muriate of Potash (MOP) is a common potassium (K) fertilizer used in soybean production.
• Micronutrients such as boron (B) are essential for plant growth and are often overlooked in efforts to provide balanced crop nutrition.
• Granular B products can be blended with MOP, but application of these blends leads to undesirable B distribution.
• Aspire is a premium K fertilizer that uses Nutriform® technology to combine potash along with two forms of B (fast and slow release) in every granule. This combination delivers B uniformly for uptake throughout the growing season, and provides a flexible application window compared to other B sources.

TRIAL DETAILS

Crop: Soybean (Glycine max)

Years: 2018-2020

Locations: 15 trials across the following states – AR, IA, IL, MN, MO, MS, NC, NE, OH, SC, TN, 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.

TREATMENTS:

Treatment (Trmnt) / Rates / Timing:

1. P Rate: As required by soil test
2. K Rate: 60 lbs K₂O/ac applied as MOP or Aspire
3. B Rate: 0.5 lb B/ac applied as Granular B or Aspire
4. Application Timing: Fall or Spring

Application Method: Broadcast Incorporated

RESULTS

SUMMARY

• Soybean yield increased with the addition of B.
• Across 15 site-years, Aspire increased soybean yield 1.9 bu/ac over MOP and 1.1 bu/ac over MOP + Granular B averaged across fall and spring applications.
• Aspire with two forms of B demonstrates the value of uniform nutrient distribution and season-long B availability for a flexible application window and greater soybean yields.