Nutrient management topics

Printable conference program

  • 21. What is going on in the fertilizer world? (1.0 NM)

    Robert Mullen, Director of Agronomy, Nutrien, Wooster, OH

    The focus of this presentation is going to be on the geographic nature of fertilizer production (where are these products produced?). Additionally, factors that are currently influencing the fertilizer market will also be discussed (supply-side issues and demand pressures).
    Session F - Wednesday, 3:10 PM - 4:00 PM
    Session G - Wednesday, 4:10 PM - 5:00 PM

  • 22. New phosphorus and potassium trials evaluated corn and soybean yield response to different soil-test values and fertilizer rates: Do results justify updating the 2013 ISU guidelines? (1.0 NM)

    Antonio Mallarino, professor and extension soil fertility specialist, Agronomy, Iowa State University, Ames, IA

    The last update to ISU phosphorus and potassium soil-test interpretations and fertilization guidelines for corn and soybean was in 2013. More than new 200 trials with corn and soybean field-response trials for each nutrient were conducted since then, most in the last three years. This presentation will share results of yield and economic benefits from fertilization and discuss any needed guidelines update.
    Session A - Wednesday, 9:00 AM - 9:50 AM
    Session B - Wednesday, 10:00 AM - 10:50 AM

  • 23. Management of fertilizer, manure, tillage, cover crop, and alum or gypsum soil amendments to minimize dissolved P loss from corn and soybean fields. (1.0 NM)

    Antonio Mallarino, professor and extension soil fertility specialist, Agronomy, Iowa State University, Ames, IA

    Research has proved that soil conservation practices that reduce soil and water loss from fields also reduce sediment-bound P loss, and several can easily achieve reductions compared with tillage management. However, some practices may increase the proportion of dissolved P in runoff and sometimes increase the loss. The presentation will provide recent research results and suggest cost-effective fertilizer and manure practices to reduce dissolved P loss from fields.
    Session J - Thursday, 10:10 AM - 11:00 AM
    Session K - Thursday, 11:10 AM - 12:00 PM

  • 24. 4Rs of nitrogen management and cover crops for reducing nitrate-N losses (1.0 NM)

    Matthew Helmers, professor and extension agricultural engineer, Agricultural and Biosystems Engineering, Iowa State University, Ames, IA

    The Iowa Nutrient Reduction Strategy calls for reductions in field to stream transport of nitrate-N. This starts in-field with nitrogen management and cover crops. This presentation will highlight the impacts of these practices on nitrate-N loss using data from long-term studies.
    Session H - Thursday, 8:00 AM - 8:50 AM
    Session I - Thursday, 9:00 AM - 9:50 AM

  • 25. Manure: Uncertainty, variability, and what it means for your operation (1.0 NM)

    Daniel Andersen, associate professor, Agricultural and Biosystems Engineering, Iowa State University, Ames, IA

    Manure is an important part of the fertility picture. I'll talk about getting the most from manure, how uncertainty impacts our decision-making, what it is costing on a farm, and how to pick equipment to help overcome manure challenges.
    Session D - Wednesday, 1:00 PM - 1:50 PM
    Session E - Wednesday, 2:00 PM - 2:50 PM