Soil and Water Management Topics

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  • 10. Soil-test biological activity (STBA) indicates soil nitrogen availability (1 SW)

    Alan Franzluebbers, research ecologist, Plant Science Research, USDA-ARS, Raleigh, NC
    Wednesday, December 16, 2020 at 9:00 AM - 10:00 AM CST
    Conservation agricultural management approaches change surface-soil conditions. Soil-test biological activity is an indicator of soil health condition and reflects changes in soil nitrogen availability. A review of the methodology and results of corn and pasture field trials will be summarized.

  • 11. A resource for successful adoption of conservation practices (1 SW)

    Liz Ripley, Conservation and Cover Crop Outreach Specialist, Iowa Learning Farms, Ames, IA; Mark Licht, ISU Assistant Professor and Extension Cropping Specialist
    Wednesday, December 16, 2020 at 1:00 PM - 2:00 PM CST
    The “Whole Farm Conservation Best Practices Manual” brought together many experts with the sole purpose of developing best management practices for the successful adoption of cover crops, no-tillage/strip-tillage, diverse rotations, and edge-of-field practices. This manual is designed to be a useful tool for farmers and crop advisers. It includes decision tools that will guide operators, landowners and conservation professionals through the decision-making process for adopting and implementing conservation practices.

  • 15. 2020 Drought, soil water-holding capacity and moisture needed for 2021 (1 SW)

    Angela Rieck-Hinz, extension field agronomist, Iowa State University Extension and Outreach, Clarion, IA
    Wednesday, December 23, 2020 at 1:00 PM - 2:00 PM CST
    The majority of Iowa experienced some degree of drought in 2020. What does the impact of these dry conditions mean for soil moisture conditions for the 2021 growing season? This presentation will review drought conditions, crop needs, how much water our soils hold, and what it will take to replace our soil moisture.

  • 26. Nitrate reduction from field to stream (1 SW)

    Matthew Helmers, professor and extension agricultural engineer, Agricultural and Biosystems Engineering, Iowa State University, Ames, IA
    Wednesday, January 13, 2021 at 9:00 AM - 10:00 AM CST
    This presentation will continue past presentations on discussing opportunities for nitrate reduction. This will highlight emerging work looking at nitrogen management, cover crops, land use, and edge of field practices.

  • 30. Impact of cereal rye cover crop on phosphorus loss with surface runoff in corn-soybean rotations managed with no-till or tillage (1 SW)

    Antonio Mallarino, professor and extension soil fertility specialist, Agronomy, Iowa State University, Ames, IA
    Wednesday, January 20, 2021 at 9:00 AM - 10:00 AM CST
    No Corn Belt research has investigated the effect of cover crops on dissolved phosphorus loss with surface runoff, although there is information about benefits for reducing soil erosion and nitrate loss with subsurface drainage. This presentation will share results of a six-year study of the value of cereal rye cover crops to reduce losses of both dissolved and soil-bound phosphorus with surface runoff in corn-soybean rotations.

  • 34. Making sense of cover crop management research (1 SW)

    Mark Licht, assistant professor and extension cropping systems specialist, Agronomy, Iowa State University, Ames, IA
    Wednesday, January 27, 2021 at 9:00 AM - 10:00 AM CST
    This topic will use recent cover crop research to hone in on best management practices for cover crops adoption in Iowa. The focus will be on research results from cover crops seeding methods, seeding rate and termination timing; starter N and strip-tillage ahead of corn; and interseeding cover crops into vegetative stage corn.

  • 38. New findings on conservation use and nutrient reduction efforts in Iowa agriculture (1 SW)

    Laurie Nowatzke, measurement coordinator, Iowa Nutrient Reduction Strategy, Iowa State University, Ames, IA
    Wednesday, February 3, 2021 at 9:00 AM - 10:00 AM CST
    Since 2013, the Iowa Nutrient Reduction Strategy has guided efforts to reduce nutrient loss and improve water quality in Iowa. This presentation will share the most recent findings on farmers’ and landowners’ use of agricultural conservation practices across Iowa. It will tap into emerging data sources—including the BMP Mapping Project and a survey of agricultural retailers—to show changes in the use of cover crops, fertilizer management, soil erosion control, and other practices over time and across various regions of the state. It will also present cost estimates associated with widespread practice adoption and the impacts these practices have had on nitrogen and phosphorus loss. Finally, the presentation will highlight some lessons learned from areas where substantial conservation progress has occurred and also from areas where there have been challenges to implementing conservation practices.

  • 52. The speed limit of soil organic carbon change (1 SW)

    Mriganka De, assistant professor, Minnesota State University, Mankato, MN
    On-demand only. Release date to be announced.
    This session looks at the controversy of tracking changes in soil carbon with management change. How quickly does carbon change after we implement new management practice?