U.S. flagAn official website of the United States government
                    Here's how you know **Official websites use .gov**
                            
                            A **.gov** website belongs to an official government organization in the United States.
 **Secure .gov websites use HTTPS**
                            
                            A **lock** (                            
                              A locked padlock                                                      
                            
                            ) or **https://** means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.


Menu Agricultural Research Service
						
                    U.S. DEPARTMENT OF AGRICULTURE
 close



Research
                Research Home
                            National Programs
                            Research Projects
                            Scientific Manuscripts
                            International Engagement
                            Scientific Software/Models
                            Databases and Datasets
                            Office of Scientific Quality Review
            Media
                News & Features
                            Multimedia
                            Briefing Room
                            Down on the Farm
                            Press Room
                            Science in Your Shopping Cart
                            Scientific Discoveries
                            Tellus
                            Under the Microscope
            About ARS
                About ARS Home
                            Staff Directory
                            Labs and Research Centers (Map)
                            Headquarter Offices
                            Organizational Chart
                            Employee Services (REE Employees Only)
                            Office of Outreach, Diversity, and Equal Opportunity
            Work With Us
                Work With Us Home
                            ARS Vacancies at USAJOBS
                            Careers at ARS Information
                            Scientific Collaborations
                            Extramural Agreements
                            1890 Faculty Research Sabbatical ProgramSearch small
                    Search
            
            ARS Home
                                About ARS
                                Contact Us




ARS Home Northeast Area University Park, Pennsylvania Pasture Systems & Watershed Management Research Research Publications at this Location





- ARS National Programs
- Search for a scientific manuscript
- Search for a research project
- ARS Software
- Programs and Projects
- Collaborations
- Subjects of Investigation
- Publications

Title:   Author  item
                                            Buda, Anthonyitem
                                            Kleinman, Peteritem
                                            SRINIVASAN, M - NAT INST WATER ATMOSP NZitem
                                            Bryant, Rayitem
                                            Feyereisen, Gary
  Submitted to: Journal of Environmental Quality
                                    Publication Type: Peer Reviewed Journal
                                    Publication Acceptance Date: 5/26/2009
                                    Publication  Date: 9/28/2009
                                    Citation: Buda, A.R., Kleinman, P.J., Srinivasan, M.S., Bryant, R.B., Feyereisen, G.W. 2009. Effects of hydrology and field management on phosphorus transport in surface runoff. Journal of Environmental Quality. 38(6):2273-2284.Interpretive Summary: Managing phosphorus loss from agriculture requires an understanding of how landscape processes interact with field management to influence phosphorus transfers.  We investigated the dynamics of phosphorus transfers in runoff from an agricultural landscape in central Pennsylvania to connect hydrologic variability by landscape position with the potential for phosphorus loss in runoff.  Phosphorus transfers were dynamic in time and space, but occurred primarily in areas where soil conditions favored the largest amounts of runoff.  Findings support the current model for targeting remedial practices to small areas of the landscape responsible for the majority of phosphorus loss in runoff.
                                Technical Abstract: Phosphorus (P) losses from agricultural landscapes arise from the interaction of hydrologic, edaphic and management factors, complicated by their spatial and temporal variability.  We monitored sites along two agricultural hillslopes to assess the effects of field management and hydrology on P transfers in surface runoff at different landscape positions.  Surface runoff varied by landscape position, with saturation excess runoff accounting for 19 times the volume of infiltration excess runoff at the north footslope position, but infiltration excess runoff dominating at upslope landscape positions.  Runoff differed significantly between south and north footslopes, coinciding with the extent of upslope soil underlain by fragipan.  Phosphorus in runoff was predominantly in dissolved reactive form (70%), with the highest concentrations (mg L-1) associated with upper landscape positions closest to fields serving as major sources of P.  These high runoff P concentrations were primarily rapid incidental transfers of P from recently applied fertilizer and manure.  However, the largest loads (g) of P were from the north footslope, where runoff volumes were 24 times larger than from all other sites combined.  Loads of P from the north footslope appeared to be primarily chronic transfers of desorbed soil P.  While runoff from the footslope likely contributed directly to stream flow, hence stream water quality, 27% of runoff P from the upslope sites did not connect directly with stream flow.  Findings of this study will be useful for evaluating the critical source area concept and metrics such as the P-Index.


Return to top


Connect with ARS Sign up


ARS Home
                            USDA.gov
                            Plain Writing
                            Policies & Links
                            Civil Rights Statements
                            FOIA
                            Accessibility Statement
                            Privacy Policy
                            Non-Discrimination Statement
                            Quality of Information
                            USA.gov
                            WhiteHouse.gov