Are Your Soils Lacking Boron, Manganese or Sulfur?

Categories: GROWING, CORN, SOYBEANS
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Digging beneath the surface of your corn and soybean plants is helpful, but analyzing soil samples at the lab brings field insights to a whole new level. That’s why Golden Harvest collects soil samples from farmers’ fields each year. A handful of nutrients are critical for crop production, including sulfur, boron and manganese. Though these nutrients aren’t always emphasized as much as other elements, they still play a big role in healthy corn and soybean development.

Golden Harvest collected more than 1,200 on-farm soil samples from 2016 to 2017, and here is a snapshot of the 3 nutrient test results in discussion:
  • Sulfur: 18% of soil samples rated low
  • Boron: 84% of soil samples rated low to very low  
  • Manganese: 52% of samples rated low to very low
To help illustrate the value of sulfur, boron and manganese, the chart below outlines primary nutrient function along with deficiency symptoms and environmental triggers.
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Steps to Correct Nutrient Deficiencies
First conduct a soil or tissue test to confirm any micronutrient deficiencies—sulfur and boron leach easily in most soils. Plants need boron and manganese in smaller quantities, and deficiencies can be corrected with a soil or in-season foliar application. Sulfur is a macronutrient needed in larger quantities, and you can correct levels by adding a mix of liquid and granular, or dry, fertilizers to your standard fertility program. 


The image above illustrates how sulfur deficiencies lead to yellowing leaves and stunting of corn plants.

When in-season deficiencies occur, you can often combine a micronutrient product with a post-emergence herbicide or fungicide application. Contact your local Golden Harvest Seed Advisor for product recommendations, rates application timings and approved tank-mixes.

Photos are either the property of Syngenta or used under agreement.

Syngenta hereby disclaims liability for third-party websites.

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