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    Seed Safety Canola – AgriFacts

    2.6 BU/AC

    Average yield increase over MAP + AS

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    Objective

    Evaluate the seed safety of MicroEssentials® S15® (13-33-0-15S) compared to MAP (11-52-0) + ammonium sulfate (AS, 21-0-0-24S) at different phosphorus (P) rates when applied with the seed.

    Evaluate the yield response of MicroEssentials® S15® compared to MAP + AS at different P rates.

    OVERVIEW

    • MAP + AS is a common P and S fertilizer blend used in canola-growing regions of North America.
    • Canola is very sensitive to seed placed in close proximity to P and S fertilizers. Conventional P and S fertilizers increase seed damage due to ammonium nitrogen and especially due to the high salt index of AS.
    • MicroEssentials® S15® contains N, P and S fused into one nutritionally balanced granule, and the estimated salt index is lower (21.1) compared to AS (68.3).

    TRIAL DETAILS

    Crop: Canola (Brassica napus)

    Year: 2011-2013

    Locations: 17 locations across the U.S. and Canada
    United States – ND
    Canada – AB, MB, SK

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

    Experimental Design: Small-plot RCBD with 4 replications.

    Cropping Conditions:

    N Rate: As recommended and balanced across all treatments.

    P Rate: 0, 17, 33 and 50 lbs P₂O₅/ac

    K Rate: Applied to entire trial area based on soil test.

    S Rate: Balanced at each P₂O₅ rate – 0, 7.7, 15 and 22.7 lbs S/ac.

    Application Timing and Method: Fertilizer was applied with the seed at planting.


    RESULTS


    SUMMARY

    • MicroEssentials® S15® outyielded MAP + AS by 1.7 bu/ac at 33 lbs and by 2.6 bu/ac at a 50-lb P₂O₅ rate across all locations.
    • MAP + AS had statistically significant lower plant populations than MicroEssentials® S15® at 17- and 33-lb P₂O₅ rates and numerically lower at the 50-lb P₂O₅ rate.
    • MicroEssentials® S15® can successfully increase canola yields over MAP + AS when applied at the same P₂O₅ rate.
    • These results demonstrated the additional seed safety that can be achieved with MicroEssentials® S15®.