February 2019

MicroEssentials® SZ® (In-furrow) in Winter Wheat


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).


  • 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.


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.

ME1129 AgriFact-Map

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.


Winter Wheat Yield Response


  • 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.

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Individual results may vary, and performance may vary from location to location and from year to year. This result may not be an indicator of results you may obtain as local growing, soil and weather conditions may vary. Growers should evaluate data from multiple locations and years whenever possible.