Abstract
Subsurface drainage, while an important and necessary agricultural production practice in the Midwest, contributes nitrate (NO3) and soluble phosphorus (P) to surface waters. The magnitude of NO3 and soluble P losses in subsurface drainage varies greatly by landscape, climate, and field management factors. This study evaluates the combined impact of these factors on observed P and NO3 concentrations in subsurface drainage water in Northwest Ohio. Factors significantly impacting NO3 concentrations included rainfall, N and P fertilizer application rate & timing, Soil Test P, soil texture, season, drain spacing, site relief, tillage, temperature, and crop. These findings provide evidence of NO3 loss via leaching following fertilizer application, and indicate that BMPs specifically targeted at reducing NO3 concentrations and soil matrix flow of NO3 following spring fertilizer application will have the greatest impact on NO3 losses from subsurface discharge. Factors significantly impacting soluble P losses included P fertilizer application rate and timing, rainfall, season, crop, soil texture, site relief, Soil Test P, tillage, and temperature. BMPs specifically targeted at P fertilizer management and prevention of soluble P movement via preferential flow pathways during rainfall events will have the greatest impact on soluble P losses from subsurface drainage systems.
| Original language | English (US) |
|---|---|
| Title of host publication | 10th International Drainage Symposium 2016 |
| Publisher | American Society of Agricultural and Biological Engineers |
| Pages | 77-87 |
| Number of pages | 11 |
| ISBN (Electronic) | 9781510855250 |
| DOIs | |
| State | Published - 2016 |
| Externally published | Yes |
| Event | 10th International Drainage Symposium 2016 - Minneapolis, United States Duration: Sep 6 2016 → Sep 9 2016 |
Publication series
| Name | 10th International Drainage Symposium 2016 |
|---|---|
| Volume | 2016-January |
Other
| Other | 10th International Drainage Symposium 2016 |
|---|---|
| Country/Territory | United States |
| City | Minneapolis |
| Period | 9/6/16 → 9/9/16 |
Bibliographical note
Funding Information:This research is part of a regional collaborative project supported by the USDA-NIFA, Award No. 2011-68002-30190, “Cropping Systems Coordinated Agricultural Project: Climate Change, Mitigation, and Adaptation in Corn-based Cropping Systems.” Project Web site: sustainablecorn.org. The 11 institutions comprising the project team include the following Land Grant Universities and USDA Agricultural Research Service (ARS): Iowa State University, Lincoln University, South Dakota State University, University of Illinois, University of Minnesota, University of Missouri, University of Wisconsin, and USDA-ARS Columbus, Ohio. This research was also funded, in part, by a USDA-NRCS Conservation Innovation Grant through the Agricultural Drainage Management Coalition (admcoalition.com); an Ohio USDA-NRCS State Conservation Innovation Grant through the Maumee Valley RC&D, Overholt Drainage Education and Research Program, Department of Food, Agricultural and Biological Engineering, Ohio Agricultural Research and Development Center, Ohio State University Extension, the Ohio State University; and was conducted in collaboration with the USDA-ARS Soil Drainage Research Unit. We also thank the cooperating farmers for providing their farms as research and demonstration sites and sharing their farm management information.
Funding Information:
This research was also funded, in part, by a USDA-NRCS Conservation Innovation Grant through the Agricultural Drainage Management Coalition (admcoalition.com); an Ohio USDA-NRCS State Conservation Innovation Grant through the Maumee Valley RC&D, Overholt Drainage Education and Research Program, Department of Food, Agricultural and Biological Engineering, Ohio Agricultural Research and Development Center, Ohio State University Extension, the Ohio State University; and was conducted in collaboration with the USDA-ARS Soil Drainage Research Unit. We also thank the cooperating farmers for providing their farms as research and demonstration sites and sharing their farm management information.
Funding Information:
This research is part of a regional collaborative project supported by the USDA-NIFA, Award No. 2011-68002-30190, “Cropping Systems Coordinated Agricultural Project: Climate Change, Mitigation, and Adaptation in Corn-based Cropping Systems.” Project Web site: sustainablecorn.org. The 11 institutions comprising the project team include the following Land Grant Universities and USDA Agricultural Research Service (ARS): Iowa State University, Lincoln University, South Dakota State University, University of Illinois, University of Minnesota, University of Missouri, University of Wisconsin, and USDA-ARS Columbus, Ohio.
Publisher Copyright:
© 2016 American Society of Agricultural and Biological Engineers. All rights reserved.
Keywords
- Nitrogen
- Statistical modeling
- Water quality
