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    Corn – Fall vs. Spring Balanced Crop Nutrition – AgriFacts

    12 BU/AC

    Increase with MicroEssentials SZ + Aspire over MAP in the fall application

    10.4 BU/AC

    Increase with MicroEssentials SZ + Aspire over MAP in the spring application

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    Objective

    Evaluate the yield response of MAP (11-52-0) + Aspire® (0-0-58-0.5B) and MicroEssentials® SZ® (12-40-0-10S-1Zn) + Aspire® applied in the fall and spring compared to MAP alone.

    OVERVIEW

    • H Fall applications of phosphorus (P) and potassium (K) fertilizers may be preferred in certain cropping systems to evenly distribute seasonal workload, but spring applications are also a common practice in the Midwest.
    • MOP is commonly used as a potassium (K) source in soybean production.
    • Research has shown that P and K fertilizers containing micronutrients in a single granule provide improved nutrient distribution and increased crop nutrient uptake compared to conventional fertilizer blends.
    • Aspire® is the first-of-its-kind micronutrient-enhanced potash fertilizer. Manufactured using Nutriform® technology, Aspire premium potash combines K and boron (B) in each granule to help achieve balanced crop nutrition.
    • MicroEssentials® SZ® uses Fusion® technology to fuse four nutrients into one nutritionally balanced granule. This provides uniform nutrient distribution, increased nutrient uptake and season-long sulfur for maximum yield.

    TRIAL DETAILS

    Locations and Crop Management:

    Crop: Corn (Zea mays)

    Years: 2014–2016

    Data Source: Field studies conducted by third-party, independent researchers.

    Locations: 19 trials across the U.S. and Canada United States – IA, IL, IN, MI, MN, ND, NE, OH, SD Canada – ON

    Experimental Design: Small-plot RCBD with 4 replications.

    Cropping Conditions:

    N Rate: Fall treatments received partial nitrogen (N) in the fall to balance for phosphate applications, with the remaining N applied in the spring. (Total N rates were based on local recommendation.)

    K Source: Aspire®

    K Rate: 60 lbs K2O/ac

    P Source: MAP, MicroEssentials® SZ®

    P Rate: 80 lbs P₂O₅/ac

    Application Timing: Fall or spring preplant

    Application Method: Broadcast incorporated


    Results


    SUMMARY

    • MicroEssentials® SZ® + Aspire® had the highest yield in both fall and spring applications.
    • MAP + Aspire® yields were 6 bu/ac higher than MAP alone for both the fall and spring applications.
    • MicroEssentials® SZ® + Aspire® yields were 12 bu/ac (6.2%) higher than MAP alone with the fall application.
    • MicroEssentials® SZ® + Aspire® yields were 10.4 bu/ac (5.3%) higher than MAP alone with the spring application.
    • Regardless of fall or spring application, a combined application of Aspire® with MicroEssentials® SZ® is a superior technology for balanced crop nutrition and increased yield.