MAP and MOP are commonly used as primary phosphate and potash sources in sugar beet-growing regions of North America.
In lower soil test phosphorus situations, a liquid starter of APP (Ammonium Poly Phosphate [10-34-0]) may be recommended in addition to fall MAP applications.
University research will often discourage the use of secondary or micronutrient sources in sugar beet production.
MicroEssentials® SZ® is a performance phosphate source that supplies multiple nutrients fused into one nutritionally balanced granule, providing uniform nutrient distribution, increased nutrient uptake, and season-long S availability.
Locations and Crop Management:
CROP: Sugar beet (Beta vulgaris)
LOCATIONS: 6 trials conducted in MN and MI
DATA SOURCE: Field studies conducted by third- party, independent researchers.
EXPERIMENTAL DESIGN: Small-plot RCBD with 4 replications.
Application Rates, Timing, and Method
P Rate: 40 lbs P₂O₅ /ac applied in the Fall as either MAP or MicroEssentials® SZ®.
K Rate: 40 lbs K₂O /ac (MN) and 180 lbs K₂O /ac (MI) applied in the Fall as MOP.
S Rate: 10 lbs S/ac applied from MicroEssentials® SZ®.
Zn Rate: 1 lbs Zn/ac applied from MicroEssentials® SZ®.
Liquid Starter: 3 gal/ac as 10-34-0 applied at planting.
Along with fall applications of MAP, liquid APP starter (10-34-0) at planting increased total yield by 0.4 ton/ac and RSA by 44 lbs/ac.
Replacing MAP with MicroEssentials® SZ® resulted in a yield increase of +1.5 ton/ac and +450 lbs/ac of RSA.
The addition of S and Zn provided by MicroEssentials® SZ® boosted total tonnage and recoverable sugar, indicating the benefits of secondary macronutrients and micronutrients in sugar beet production.
Access additional yield data, ROI calculators, and resources at MicroEssentials - Performance.