Iowa Nutrient Research Center

The Iowa Nutrient Research Center was established by the Iowa Board of Regents in response to legislation passed by the Iowa Legislature in 2013. The center pursues science-based approaches to areas that include evaluating the performance of current and emerging nutrient management practices, and providing recommendations on implementing the practices and developing new practices.


Current News

8/26/16 - NEW The 2015-2016 Iowa Nutrient Reduction Stategy progress report is now available in downloadable PDF format on the INRS website.

8/25/16 - New projects for 2016-2017 added.

8/16/16 - There will be a meeting of the center's advisory council at 2:30 p.m. Aug. 23 in Room 1126 at the Hansen Ag Student Learning Center, 2516 Mortensen Rd., in Ames. 2016 Iowa Nutrient Research Center Meeting Notice.docx

3/14/2016 - Cover crops offer a valuable tool for farmers to reduce nutrient loss and help ensure clean water in Iowa waterways. But some farmers have reported that planting winter rye as a cover crop may reduce corn yield. A team of researchers at Iowa State University is investigating why there may be an occasional decrease in corn yield after planting winter rye.

1/15/2016 - For over 25 years, Gilmore City has been a key location for ISU researchers working to improve water quality. Read why it is considered the nation’s premier site for water quality science and how it drives progress.


Resources & Publications

Research Summary Handout (PDF)

Managing the N Factor

Water Quality Program - Extension and Outreach

Castellano and Helmers Nitrogen Presentation

Presentation: Soil Nitrogen Cycling Budgeting (Castellano) and Drainage and Nitrate Loss (Helmers)

Summary: Soil Nitrogen Cycling and Budgeting, Drainage and Nitrate Loss

Reducing nutrient loss: Science shows what works - Iowa State University Extension and Outreach publication (SP435)


Advisory Council

The original legislation identified members of the Center’s advisory council.  

  • Iowa Secretary of Agriculture
  • Administrative director Iowa Department of Agriculture and Land Stewardship Division of Soil Conservation
  • Iowa Department of Natural Resources
  • Nutrient researcher, University of Northern Iowa
  • Nutrient researcher, State Association of Private Colleges
  • Iowa Institute of Hydraulic Research (IIHR) – Hydroscience and Engineering, University of Iowa
  • Vice President, Iowa State University Extension and Outreach
  • Dean, College of Agriculture and Life Sciences, Iowa State University

The Dean of the College of Agriculture and Life Sciences of Iowa State University shall appoint a director of the Iowa Nutrient Research Center. John Lawrence, Associate Dean and Director Agriculture and Natural Resources Extension and Outreach was appointed the director.

For additional information, contact:

John Lawrence
Director, Iowa Nutrient Research Center
132 Curtiss Hall
Ames, Iowa 50011-1050
(515) 294-7801
jdlaw@iastate.edu