Depending on moisture, the amount of nitrogen available to growers was reduced this past year. WinField United Regional Agronomist Eric Hanson says weather also influences the availability of micronutrients. A soil sample is a priority. “We want to make the fertilizer plan based off of that soil sample, but we utilize tissue samples within a growing season so if Mother Nature sends us another curve ball, we’ve got that procedure in place to monitor that crop and flex one way or another.” WinField United has released data from its tissue sampling research. Nearly all of the samples from North Dakota corn fields were deficient in zinc. Zinc and copper were deficient in wheat. More than 90 percent of North Dakota’s wheat was also limited by chloride. In Minnesota corn, nearly 90 percent of the crop was low on zinc. Nearly 80 percent of Minnesota’s soybeans suffered from copper deficiency early in the season. Zinc was also the issue in more than 85 percent of South Dakota’s corn crop.
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