Unique Crop Nutrition Solution Is an Effective/Efficient Zinc Solution.

Zinc (Zn) is the micronutrient that most commonly limits corn yield in North America and worldwide. This study was conducted to determine if MicroEssentialsSZ (MESZ) (12-40-0-10S-1Zn) a patented ammoniated phosphate fertilizer, is a more efficient and effective zinc source for  corn than the traditional MAP/ ammonium sulfate/ zinc sulfate blends in broadcast applications. MESZ was compared at 89.65 kg/ha of P2O5, 22.41 kg/ha S, and 2.24 kg/ha Zn with MAP/ ammonium sulfate/ zinc sulfate blends containing  0, 2.24, 4.48, 6.72, and 11.21 kg Zn/ha in RCBD with 4 replications. This study was conducted in 2010 and 2011 on 6 locations in Indiana, Minnesota, South Carolina, South Dakota and Arkansas. On average across all site-years, there was a significant (p<0.001) corn yield response to Zn fertilizer. Corn yield increased from 10.17 tonnes/ha without Zn to 11.15 tonnes/ha with 11.21kg Zn/ha applied as the physical blend. However, the highest yield (11.38 tonnes/ha) was obtained with MESZ (at a rate of 2.24 kg  Zn/ha), which was significantly (p<0.05) higher than the 2.24, 4.48, and 6.72 kg Zn/ha rates applied as a blend. These results clearly indicate that MESZ is a 3 to 5 times more efficient Zn source than the MAP/ammonium sulfate/zinc sulfate physical blend, due to the more uniform Zn distribution and the supply of all the nutrients in one granule.