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Implications of Managing Manure on a Nitrogen Basis


Implications of Managing Manure on a Nitrogen Basis

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Meeting crop nitrogen needs with manure while overapplying other nutrients can save the crop farmer the cost of additional fertilizer, but every decision we make on a farm has consequences. Managing manure based on more than just one nutrient might be more complicated, but it may save our fields from implications that we may not have thought about initially. During this webinar, we will discuss using whole farm and field-based nitrogen (N) and phosphorus (P) balances to identify opportunities for improvements in nutrient use and monitor the impact of management changes over time. Presenters will also discuss the time necessary to reduce the soil phosphorus levels after phosphorus fertilization is halted in cropping fields. Additionally, we’ll consider the issues with zinc accumulation in soils that have received repeated applications of poultry litter or swine manure and the challenges with managing zinc toxicity.

An application for continuing education credit for Certified Crop Advisors (CCAs) and members of the American Registry of Professional Animal Scientists (ARPAS) will be submitted.

Presenters include:

  • Quirine Ketterings & Agustin Olivo, Cornell University
  • Stephanie Kulesza, North Carolina State University
  • Luciano Gatiboni, North Carolina State University

Handouts (PDF format) will be available the day of the webinar at the live webinar information page. Find out more about this webinar and future webinars by the Livestock and Poultry Environmental Learning Community (LPELC).

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About the Extension Foundation

The Extension Foundation was formed in 2006 by Extension Directors and Administrators. Today, the Foundation partners with Cooperative Extension through liaison roles and a formal plan of work with the Extension Committee on Organization and Policy (ECOP) to increase system capacity while providing programmatic services, and helping Extension programs scale and investigate new methods and models for implementing programs. The Foundation provides professional development to Cooperative Extension professionals and offers exclusive services to its members. In 2020 and 2021, the Extension Foundation has awarded 85% of its direct funding back to the Cooperative Extension System, 100% of funds are used to support Cooperative Extension initiatives. 

This technology is supported in part by New Technologies for Ag Extension (funding opportunity no. USDA-NIFA-OP-010186), grant no. 2023-41595-41325 from the USDA National Institute of Food and Agriculture. Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the view of the U.S. Department of Agriculture or the Extension Foundation. For more information, please visit You can view the terms of useat

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