Soil Fertility Iowa State University

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Secondary and micronutrients

Extension Publications

Presentations

Secondary and micronutrients. J.E. Sawyer. 2020. Soil fertility and nutrient management short course. Iowa State University Extension and Outreach, Ames.

View presentations 2015 and earlier -- click here to expand

Increasing importance of sulfur for field crops. 2015. Sawyer, J., B. Lang, and D. Barker. University of Illinois Ag Masters program
Update on sulfur response in Iowa field crop production. 2014. Sawyer, J., B. Lang, and D. Barker. Iowa State University Crop Advantage Series.

Newsletter Articles

Do I Need to Add Micronutrients into my Soil Fertility Program? (10/2024)
Who needs sulfur? You might need sulfur (10/2024)
What's with all the yellow soybean? (7/2021)
What causes striped corn leaves? (6/2021)
Is it nitrogen or sulfur deficiency symptoms (6/2020)
Crop sulfur fertilization this spring (3/2020)

View newsletter articles 2015 and earlier -- click here to expand

Soil calcium: magnesium ratios (4/2003)
Gypsum: an old product with a new use? (4/2003)
Is it iron or potassium deficiency (7/2002)

Conference Proceedings and Reports

Mallarino, A.P., and M.U. Haq. 2021. High gypsum application rates impacts on Iowa soil properties, dissolved phosphorus loss, and crop yield. p.75-82. In 51st Annual North-Central Extension-Industry Soil Fertility Conf. Proceedings. 18-19 November 2021. Des Moines, Iowa.
Mallarino, A.P., M.U. Haq, and M. Al-Kaisi. 2020. High gypsum application rates impacts on soil cation balance, water soluble phosphorus, soil physical properties, and crop yield. Final project report to the Iowa Department of Agriculture and Land Stewardship and Calcium Products Inc.
Fawcett, J., J. Rogers, Z. Koopman, T. Mitchell, M. Schnabel, and J. Sawyer. 2017. On-Farm sulfur fertilization of alfalfa and corn demonstration trials. Iowa State Univ. Research Farm Annual Reports. ISRF17, RFR-A1732. Iowa State Univ., Ames, IA.

View conference proceedings and reports 2016 and earlier -- click here to expand

Fawcett, J., J. Rogers, Z. Koopman, T. Mitchell, K. Nicolaus, and J. Sawyer. 2016. On-Farm sulfur fertilization of alfalfa and corn trials. Iowa State Univ. Research Farm Annual Reports. ISRF16, RFR-A1664. Iowa State Univ., Ames, IA.
Mallarino, A.P. 2016. Value of tissue testing to improve phosphorus, potassium, and micronutrients management for corn and soybean. p. 139-146. In The Integrated Crop Management Conf. Proceedings. Nov. 30-Dec. 1, 2016. Iowa State Univ. Extension.
Mallarino, A.P., R. Oltmans, and M. Rees. 2016. Continuous corn response to nitrogen, potassium, and sulfur in southeast Iowa. Southeast Research and Demonstration Farm Annual Reports. ISRF15-34, RFR-A1588. Iowa State Univ., Ames, IA.
Mallarino, A.P., P. Barbieri, R. Oltmans, J. Enderson, and V. Lawson. 2015. Corn and soybean yield response to micronutrients in a sandy Iowa soil. Muscatine Island Research and Demonstration Farm Annual Reports. ISRF14-20, RFR-A1419. Iowa State Univ., Ames, IA.
Mallarino, A.P., J. Enderson, R. Oltmans, M. Haq, and M. Rees. 2015. Corn and soybean yield response to micronutrients in southeast Iowa. Southeast Research and Demonstration Farm Annual Reports. ISRF14-34, RFR-A1482. Iowa State Univ., Ames, IA.
Mallarino, A.P., J. Enderson, R. Oltmans, M. Haq, and J. Sievers. 2015. Corn and soybean yield response to micronutrients. Northwest Research Farm and Allee Demonstration Farm Annual Reports. ISRF14-29,31, RFR-A1454. Iowa State Univ., Ames, IA.
Mallarino, A.P., M. Haq, P. Barbieri, J. Enderson, R. Oltmans, and N. Piekema. 2015. Corn and soybean yield response to micronutrients in southern Iowa. McNay Memorial Research and Demonstration Farm Annual Reports. ISRF14-35, RFR-A14109. Iowa State Univ., Ames, IA.
Mallarino, A.P., M. Haq, J. Enderson, R. Oltmans, and M. Fiscus. 2015. Corn and soybean yield response to micronutrients in central Iowa. Agric. Eng., Agronomy, and Central Iowa Research Farms Annual Reports. ISRF14-16,30; RFR-A14110. Iowa State Univ., Ames, IA.

Corn and soybean yield response to micronutrients in southwest Iowa

Mallarino, A.P., M. Haq, J. Enderson, R. Oltmans, and K. Pecinovsky. 2015. Corn and soybean yield response to micronutrients in northeast Iowa. Northeast Research and Demonstration Farm Annual Reports. ISRF14-13, RFR-A14106. Iowa State Univ., Ames, IA.
Mallarino, A.P., M. Haq, J. Enderson, R. Oltmans, and M. Smidt. 2015. Corn and soybean yield response to micronutrients in northern Iowa. Northern Research and Demonstration Farm Annual Reports. ISRF14-22, RFR-A1462. Iowa State Univ., Ames, IA.
Mallarino, A.P., J.J. Camberato, D.E. Kaiser, C.A.M. Laboski, D.A. Ruiz-Diaz, and T.J. Vyn. 2015. Micronutrients fertilization for corn and soybean: A research update. p. 44-57. In 45th North-Central Extension-Industry Soil Fertility Conf. Proceedings. Nov. 19-20 2014. Vol. 31. Des Moines, IA. International Plant Nutrition Institute, Brookings, SD.
Mallarino, A.P., J.T. Enderson, and M.U. Haq. 2014. Corn and soybean yield responses to micronutrients fertilization. p. 129-135. In The Integrated Crop Management Conf. Proceedings. Dec. 3-4, 2014. Iowa State Univ. Extension.
Licht, M. 2012. Glyphosate, manganese, and zinc soybean trial. Iowa State University, Ag
Engineering/Agronomy, Central Iowa, and BioCentury Research Farms report ISRF12-16,30. Iowa State Univ., Ames
Lang, B. 2011. Potential of glyphosate-manganese interaction, 2008-2010. Howard county experimental farm report, January 28, 2011. Iowa State Univ. Ext., Ames
Mallarino, A.P., R.R. Oltmans, J.R. Prater, C.X. Villavicencio, and L.B. Thompson. 2011. Nutrient Uptake by Corn and Soybean, Removal, and Recycling with Crop Residue. p. 103-113. In Proc. 23rd Annual Integrated Crop Management Conf., Ames, IA 30 Nov. – 1 Dec. 2011. Iowa State Univ., Ames, IA
Voss, R. 1998. Micronutrients. Iowa State Univ., Ames, IA
Sawyer, J., B. Lang, and D. Barker. 2011. Sulfur emerges as a nutritional issue in Iowa alfalfa production. p. 6-7. Better Crops, Vol. 95 (2011, No.2).
Sawyer, J., B. Lang, and D. Barker. 2011. Sulfur fertilization response in Iowa corn production. p. 8-10. Better Crops, Vol. 95 (2011, No. 2).
Rehm G., What's new with micronutrients in our part of the world? Iowa State Univ., Ames, IA
Sawyer, J., and D. Barker. 2011. Evaluation of combination phosphorus - sulfur fertilizer products for corn production. Iowa State Univ., Ames, IA
Sawyer, J., D. Barker, and B. Lang. 2010. Summary of sulfur strip trials conducted in central and northeast Iowa. Preliminary 2009 results. Iowa State Univ., Ames, IA.
Sawyer, J., B. Lang, D. Barker, and G. Cummins. 2009. Dealing with sulfur deficiency in Iowa corn production. p. 117-123. In Proc. 21st Annual Integrated Crop Manag. Conf., Ames, IA. 2-3 Dec. 2009. Iowa State Univ., Ames, IA
Sawyer, J.E., B. Lang, D.W. Barker, and G. Cummins. 2009. Dealing with sulfur deficiencies in crop production: the Iowa experience. p. 64-73. InProc. Thirty-Ninth North Central Extension-Industry Soil Fertility Conf., Des Moines, IA. 18-19 Nov. 2009. Vol. 25. International Plant Nutrition Inst., Brookings, SD.
Sawyer, J., B. Lang, G. Cummins, and D. Barker. 2009. Evaluation of corn response to sulfur fertilization in central to northeast Iowa. Project report for 2007-2008 research. Iowa State Univ., Dept. of Agronomy, Ames, IA.
Sawyer, J., Brian Lang, and Daniel Barker. Dealing with sulfur deficiencies in crop production: the Northeast Iowa experience. Indiana CCA Conference, Dec. 16-17, 2008, Indianapolis, IN
Sawyer, J., B. Lang, and D. Barker. 2008. Evaluation of corn response to sulfur fertilization in northeast Iowa. Project report for 2006 and 2007 research. Iowa State Univ., Dept. of Agronomy, Ames, IA.
Lang, B., J. Sawyer, and S. Barnhart. 2006. Dealing with sulfur deficiency in northeast Iowa alfalfa production. p. 225-235. In Proc. 18th Annual Integrated Crop Manag. Conf., Ames, IA. 29-30 Nov. 2006. Iowa State Univ., Ames, IA.
Sawyer, J.E., and D.W. Barker. 2002. Corn and soybean response to sulfur application on Iowa soils. p. 157-163. In Proc. Thirty Second North Central Extension-Industry Soil Fertility Conf., Des Moines, IA. 20-21 Nov. 2002. Potash and Phosphate Inst., Brookings, SD.
Sawyer, J.E. and D.W. Barker. 2002. Sulfur application to corn and soybean crops in Iowa. p. 13-24. In Proc. 14th Annual Integrated Crop Manag. Conf., Ames, IA. 4-5 Dec. 2002. Iowa State Univ., Ames, IA.
Bickel, A., and R. Killorn. 2001. Spatial response of corn to banded zinc sulfate in Iowa. In Proc. Thirty First North Central Extension-Industry Soil Fertility Conf., Des Moines, IA 14-15 Nov. 2001. Potash and Phosphate Inst., Brookings, SD
Mallarino, A.P., D. Haden, and A. Christensen. 2000. Sulfur fertilization for corn. p. 19-21. In Annual progress reports-1999. Northwest research and demonstration farm. ISRF99-29, 31. Iowa State Univ., Ames, IA.

Featured

Micronutrients for Soybean Production in the North Central Region
Antonio Mallarino, Daniel Kaiser, Dorivar A. Ruiz-Diaz, Carrie A.M. Laboski, James J. Camberato, Tony J. Vyn

Micronutrients are needed in very small quantities by plants but are essential for growth and production.This publication is intended to be a resource for farmers and crop advisers of the North Central Region regarding micronutrient use in soybean production. Its purpose is to discuss issues and provide information on micronutrients requirements by soybean, factors that influence their utilization, and the value of soil and plant tissue testing to complement information and recommendations provided in specific extension publications in the different states of the region.

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