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    SZ in Winter Wheat – AgriFacts

    4.1 BU/AC

    MicroEssentials SZ over MAP

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    Objective

    Evaluate the yield response of winter wheat to applications of MAP (11-52-0) and MicroEssentials® SZ® (12-40-0-10S-1Zn) when placed in-furrow with the seed (Air-drill placement).

    OVERVIEW

    • MAP (11-52-0) is commonly used as a phosphorus (P) source and applied with the seed in winter wheat cropping systems.
    • In addition to nitrogen (N) and P, other nutrients like sulfur (S) and zinc (Zn) are beneficial to achieve maximum yield.
    • MicroEssentials® SZ® (12-40-0-10S-1Zn) is a dry granular fertilizer that provides uniform nutrient distribution, increased nutrient uptake, and two forms of S (sulfate + elemental) for season-long availability.

    TRIAL DETAILS

    Crop: Wheat (Triticum Aestivum)

    Years: 2017-2019

    Data Source: Field studies conducted at university sites by Kansas State University.

    Locations: 9 trials across 8 locations in Kansas.

    Experimental Design: Small-plot RCBD with 4 replications.

    Treatments: MAP (11-52-0)
    MicroEssentials® SZ® (12-40-0-10S-1Zn)

    N Rate: Followed local recommendations and was balanced across all treatments.

    P Rate: 40 lbs P₂O₅/ac as MAP or MicroEssentials® SZ®.

    S Rate: 10 lbs S/ac from MicroEssentials® SZ®.

    Zn Rate: 1 lb Zn/ac from MicroEssentials® SZ®.

    Application Details: Cropping systems followed local practices. Fertilizer was placed in-furrow with the seed to simulate large-scale air-drill applications.


    Results


    SUMMARY

    • Winter wheat yields increased with the addition of sulfur and zinc.
    • Averaged across 9 site-years, MicroEssentials® SZ® applied at 100 lbs product/ac outperformed MAP by +4.1 bu/ac.
    • MicroEssentials® SZ® applied with the seed at planting provides superior performance to the traditional practice of only applying MAP.