(Tuscola County, Michigan) – Through soil testing, a Michigan farmer saw Excelis Maxx protect broadcasted 28% UAN from three loss pathways over a cool, rainy five-week period compared to untreated fertilizer. Five weeks after 28% UAN application, soil test results showed that Excelis Maxx protected the nitrogen from three loss pathways and resulted in a higher soil nitrate level in the 0 to 6-inch depth:
Soil NO3—N (lb/ac)
Untreated 28% UAN
Excelis Maxx Treated 28% UAN
The farmer used 28% UAN broadcast on March 21st at a rate of 35 gal/ac (105 lb N/ac) on a sugar beet field in Tuscola County, MI. Half of the field received fertilizer treated with Excelis Maxx at a rate of 25 oz/ton of UAN, the other half received untreated fertilizer.
Soil nitrate was tested at the 0 to 6-inch depth on April 25th. Between application and sampling, temperatures were variable, ranging from low 30’s to low 70’s, and measurable rainfall during 13 of the 35 days. Total rainfall was approximately 6.25 inches over this period, with the largest rainfall being 1.36 inches on April 6th.
The field’s soil type is tappan-londo loams, and is classified as prime farmland if drained; however, its drainage class is poorly drained. The subsoil is classified as having strong gleying, which further shows a low oxygen and poorly drained environment. Soil pH is 7.5, CEC is 12 meq/100 g, and organic matter is 2.5%. This soil with the high amount of moisture is considered extremely high risk for leaching, volatilization, and denitrification losses.