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United States Department of Agriculture

Agricultural Research Service

Title: Hydrologically Managed Seasonal Wetland Conditions Reduce Runoff, Drainage,and Nitrate Transport from a Corn/soybean Agroecosystem Using Water Table Management

Authors
item Ganesan, Y - OH STATE UN GRAD STUDENT
item Brown, L - OHIO STATE UNIVERSITY
item Fausey, Norman
item Workman, S - UNIV OF KENTUCKY
item Subler, S - PACIFIC GARDEN CO.
item Bierman, P - OHIO STATE UNIV - PIKETON

Submitted to: ASAE Annual International Meeting
Publication Type: Proceedings
Publication Acceptance Date: July 19, 1999
Publication Date: N/A

Technical Abstract: This project focuses on a water quality remediation approach using a coupled wetland agricultural ecosystem, producing corn and soybeans, conducted at the Piketon Research and Extension Center in Southern Ohio. In this modified agroecosystem, the cropland is maintained under productive management using subirrigation during the growing season, and is then managed as a seasonal wetland during the non-growing season by controlled drainage. More than three years of hydrologic, nitrate, and ammonia transport data from the replicated plots with conventional subsurface drainage and the coupled-wetland agroecosystem have been collected and analyzed. Results indicate that the coupled-wetland agroecosystem substantially reduced runoff, subsurface drainage, and associated nitrate and ammonia losses from the system to surface waters, compared with conventional subsurface drainage. Overall, there was up to a 77% reduction in NO3-N loads for the coupled wetland agroecosystem treatment compared to the conventional subsurface drainage treatment.

Last Modified: 11/24/2014
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