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Long-term soil productivity and sustainability of forest harvest residue harvesting

Presenters: Jeff Hatten, Assistant Professor, Oregon State University; Scott Holub, Silviculture Research Scientist, Weyerhaeuser NR Company

Hosted by: Northwest Advanced Renewables Alliance (NARA)

Forest harvesting intrinsically removes organic matter and associated nutrients; these exports may impact soil productivity of managed forests. We will examine the effects of removing forest floor and harvest residues on soils and sustainable production in intensively managed Douglas-fir forests of the Pacific Northwest. We will discuss the amount and types of biomass being removed and how biomass harvesting impacts various nutrients (e.g. nitrogen, phosphorus, calcium). Nutrient removals may impact long-term production or growth in these forests, and we will use simple thresholds and nutrient budgets to examine this trend. Finally, we will discuss the limitations of this approach and opportunities for further research. Webinar attendees will come away with an understanding of the issues surrounding long-term sustainability in forest residue harvesting scenarios and the limitations of our knowledge on these issues.

Register for this webinar at https://attendee.gotowebinar.com/register/3399378061156075522

NARA webinars benefit industry (primary and secondary manufacturers, chemical, and biofuel), researchers, contractors, land managers, policymakers, state and local agency personnel, NGOs, educators, and students – all who are interested and involved in operations converting forest-based biomass to biofuels and co-products.

Future webinars are posted to http://nararenewables.org/features/webinar-series

https://youtu.be/Bkho8fsrZGA

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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 extension.org. You can view the terms of useat extension.org/terms.

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