Micronutrients for soybean production: a position paper for the north central region
Sustainable Production
GeneticsGenomicsSeed quality
Parent Project:
This is the first year of this project.
Lead Principal Investigator:
Antonio Mallarino, Iowa State University
Co-Principal Investigators:
Dorivar Ruiz-Diaz, Kansas State University
James J Camberato, Purdue University
Tony Vyn, Purdue University
Daniel Kaiser, University of Minnesota
Carrie Laboski, University of Wisconsin
+4 More
Project Code:
Contributing Organization (Checkoff):
Institution Funded:
Brief Project Summary:

Micronutrients are elements taken up and utilized by soybean and other crops in very small amounts compared to nutrients such as nitrogen, phosphorus, potassium, sulfur and others. Although micronutrients are not needed in large quantities, a lack of sufficiency can have profound effects in the yield of soybean because they perform essential physiological functions in the plant. The objective of this project is to prepare a regional position paper addressing the most important issues concerning use of micronutrients for soybean production in the North Central region.

Growers, crop consultants, and extension agronomists are seeking additional information on the interaction of micronutrients...

Unique Keywords:
#micronutrients, #nutrient recommendations, #plant tissue analysis, #soil fertility, #soil testing
Information And Results
Final Project Results

No specific final results are possible for this type of project. Information collected up to this time is confirming that the likelihood of soybean yield response to micronutrients is small across the entire region, and that use of sufficiency levels for soil or plant-tissue tests being suggested in the literature for most micronutrients or soybean yield levels may encourage unneeded fertilization. However, deficiencies and likely response to fertilization are observed in some specific soil types or conditions found in smaller areas. Deficiencies of several micronutrients are commonly observed in sandy, coarse textured soils. Soybean iron deficiency chlorosis (IDC) is frequently observed in high-pH (calcareous) soils in the western area of the region, and recent research being summarized shows that newly available products and methods of application have good potential to alleviate deficiencies. Manganese deficiency in soybean sometimes is observed in northcentral region states east of Illinois and Wisconsin. However, the information collected indicates the challenge of identifying specific responsive fields by soil or tissue testing given significant impacts of transient and temporally variable soil properties such as moisture and aeration on Mn plant-availability. The information available shows that high yielding soybean can remove high amounts of micronutrients with harvested grain, but that the yield level or the yield potential alone cannot be used as indicator for micronutrient fertilizer requirements. Therefore, major concepts likely to be included in the publication will be the inadequacy of published sufficiency levels for some micronutrients for soil or tissue tests, the poor reliability of tests for other micronutrients, and a need for further research focusing on specific soils or conditions where yield response is most likely. These include sandy, calcareous, organic, or severely eroded soils.

The United Soybean Research Retention policy will display final reports with the project once completed but working files will be purged after three years. And financial information after seven years. All pertinent information is in the final report or if you want more information, please contact the project lead at your state soybean organization or principal investigator listed on the project.