Update regarding the coronavirus/COVID-19 pandemic

Dear Colleagues,

It is with great disappointment that we must announce the postponement of IHSS 2020 to August 15-20, 2021. We have worked very diligently over the past 2 years on preparing an excellent conference in a spectacular location. Unfortunately, given the uncertainty regarding the COVID-19 pandemic, the restrictions on international travel, and concerns regarding the health and welfare of attendees, we felt that there was no choice but to cancel the meeting and reschedule for the summer of 2021. The plan is to retain the current list of presenters and the program that was prepared. Nevertheless, we anticipate that some presenters may be unable or unwilling to attend a rescheduled meeting. We are in the process with contacting the presenters to confirm their participation in the rescheduled conference in August 2021. For those that agree to remain a presenter, we will offer the opportunity to revise or update the abstract. We will undoubtedly reopen abstract submission to fill anticipated gaps in the program.

We thank you for your support of the meeting and of IHSS and we look forward to your participation at the conference in 2021. In the meantime, we hope you remain safe and healthy.


Fernando Rosario-Ortiz and Ray Hozalski

IHSS 2020 Co-organizers

Important Conference Information


Important Dates

  • IHSS2020 is still accepting abstracts for posters!
  • June 1 – Early bird registration deadline (reduced registration cost).
  • June 16 – Deadline to reserve a room for the conference with YMCA of the Rockies.

Quick Links


Dr. Fernando Rosario-Ortiz & Dr. Ray Hozalski are the organizers of the 2020 IHSS Conference.  Dr. Rosario Ortiz is a professor of environmental engineering at the University of Colorado and Dr. Hozalski is a professor of environmental engineering at the University of Minnesota.
This conference is being organized in collaboration with the International Humic Substances Society.



The conference and lodging will be at YMCA of the Rockies in Estes Park.
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Transportation options are available from Denver International Airport (DEN) and around Estes Park.
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Field Trip

Tour of beautiful Rocky Mountain National Park.
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Choose from rafting, zip-lining, hiking, archery, horseback riding.
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Social events

Outdoor cookout, music, banquet dinner with live music and square dancing.
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Scientific Committee

  • Yiannis Deligiannakis, University of Ioannina
  • William Becker, Hazen and Sawyer
  • Thomas Borch, Colorado State University
  • Deborah Dick, Federal University of Rio Grande do Sul
  • Raymond Hozalski, University of Minnesota
  • Heike Knicker, Instituto de Recursos Naturales y Agrobiolog√≠a de Sevilla
  • Julie Korak, University of Colorado, Boulder
  • Diane McKnight, University of Colorado, Boulder
  • Teodoro Miano, University of Bari Aldo Moro
  • Kathleen Murphy, Chalmers University
  • Fernando Rosario-Ortiz, University of Colorado, Boulder
  • Roger Swift, University of Queensland
  • E. Michael Thurman, University of Colorado, Boulder
  • Jianming Xu, Zhejiang University