Southeast Purdue Agricultural Center (SEPAC) drainage research data, 1984-2020

Southeast Purdue Agricultural Center (SEPAC) sample collection

This dataset contains research data obtained during a long-term subsurface drainage research project conducted at the Southeast Purdue Agricultural Center in Jennings County, Indiana, from 1984 to 2020. The project was funded in part by Purdue Agricultural Research Programs and the USDA National Institute of Food and Agriculture, Hatch project 87887. The original goals of the project were to evaluate the effects of different subsurface drain spacings (drainage intensities) on drain flow and corn growth and yield. Additional objectives were added over the years, especially related to movement of agricultural chemicals (nitrate-N, other nutrients, and pesticides) through the soil into the drainage waters.

The main data included here are drainflow and nitrate-N concentrations and loads from each of six tile drains, on a daily basis, from 1985 through 2015. As described in the Methods, the six tile drains comprise two replications each of three drain spacings (5, 10, 20m). Flow data are presented both as volume (liters) and on a per area basis (cm). Other data include daily precipitation and some discontinuous concentration data for ammonium-N, dissolved organic carbon, chloride, phosphorus, and pH. Agronomic data include crop yields (corn, soybean) and grain moisture content from 1984 through 2020. Detailed site information is provided, including experimental design, drainage design, agronomic management practices, and soils data. A list of the primary journal articles and Extension publications from the site are also included.

Data are published on the Purdue University Research Repository (PURR): https://doi.org/10.4231/CTM1-0Y45
Bundle comprises 12 .csv, 14 .jpg, 5 .pdf, and 2 .xlsx files, plus README.txt.

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Southeast Purdue Agricultural Center (SEPAC) drainage research data, 1984-2020. Purdue University Research Repository (PURR) datasethtml
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Field	Value
Tags	Agriculture drainage Indiana corn nitrate-N water quality crop yield soybean
Modified	2023-01-17
Release Date	2022-12-29
Identifier	93c41031-d371-49c3-a450-62e5e39a37da
Spatial / Geographical Coverage Area	POINT (-85.5398 39.0258)
Publisher	Purdue University Research Repository
Spatial / Geographical Coverage Location	Research experiment located in Jennings County, Indiana, US
Temporal Coverage	January 1, 1984 to December 31, 2020
License	Creative Commons CCZero
Contact Name	Kladivko, Eileen
Contact Email	kladivko@purdue.edu
Public Access Level	Public

Extended Metadata:

Field	Value
Authors	Kladivko, Eileen (ORCID) Bowling, Laura (ORCID) Chighladze, Giorgi (ORCID) Abendroth, Lori (ORCID)
Peer Reviewed	No
Use Limitations	Research data have been collected across 37 years and methodologies changed over time. Users need to review all methods to properly contextualize and interpret the dataset. Users are strongly encouraged to reach out to the point-of-contact with any questions pertaining to the data and experimental site.
Funding Sources	Purdue University Purdue Agricultural Research Programs National Institute of Food and Agriculture Hatch Project 87887
Related Articles	Kladivko, E. J., & Bowling, L. C. (2021). Long‐term impacts of drain spacing, crop management, and weather on nitrate leaching to subsurface drains. Journal of Environmental Quality, 50(3), 627-638. https://doi.org/10.1002/jeq2.20215 Trend analysis of the SEPAC 30 year drainage climatology. (2016). In 2016 10th International Drainage Symposium. American Society of Agricultural and Biological Engineers. https://doi.org/10.13031/ids.20162515027 Negm, L. M., Youssef, M. A., Skaggs, R. W., Chescheir, G. M., & Kladivko, E. J. (2014). DRAINMOD-DSSAT Simulation of the Hydrology, Nitrogen Dynamics, and Plant Growth of a Drained Corn Field in Indiana. Journal of Irrigation and Drainage Engineering, 140(8). https://doi.org/10.1061/(asce)ir.1943-4774.0000738 Eileen J Kladivko, L C Bowling, & V Poole. (2010). Nitrate-N Loads to Subsurface Drains as Affected by Drainage Intensity and Agronomic Management Practices. In 9th International Drainage Symposium held jointly with CIGR and CSBE/SCGAB Proceedings, 13-16 June 2010, Québec City Convention Centre, Quebec City, Canada. American Society of Agricultural and Biological Engineers. https://doi.org/10.13031/2013.32139 Wang, X., Frankenberger, J. R., & Kladivko, E. J. (2006). Uncertainties in DRAINMOD predictions of subsurface drain flow for an Indiana silt loam using the GLUE methodology. Hydrological Processes, 20(14), 3069-3084. https://doi.org/10.1002/hyp.6080 Wang, X., Mosley, C., Frankenberger, J., & Kladivko, E. (2006). Subsurface drain flow and crop yield predictions for different drain spacings using DRAINMOD. Agricultural Water Management, 79(2), 113-136. https://doi.org/10.1016/j.agwat.2005.02.002 Kladivko, E. J., Willoughby, G. L., & Santini, J. B. (2005). Corn Growth and Yield Response to Subsurface Drain Spacing on Clermont Silt Loam Soil. Agronomy Journal, 97(5), 1419-1428. https://doi.org/10.2134/agronj2005.0090 Kladivko, E. J., Frankenberger, J. R., Jaynes, D. B., Meek, D. W., Jenkinson, B. J., & Fausey, N. R. (2004). Nitrate Leaching to Subsurface Drains as Affected by Drain Spacing and Changes in Crop Production System. Journal of Environmental Quality, 33(5), 1803-1813. https://doi.org/10.2134/jeq2004.1803 X. Wang, J. R. Frankenberger, & E. J. Kladivko. (2003). ESTIMATING NITRATEN LOSSES FROM SUBSURFACE DRAINS USING VARIABLE WATER SAMPLING FREQUENCIES. Transactions of the ASAE, 46(4). https://doi.org/10.13031/2013.13965 Kung, K.-J. S., Kladivko, E. J., Gish, T. J., Steenhuis, T. S., Bubenzer, G., & Helling, C. S. (2000). Quantifying Preferential Flow by Breakthrough of Sequentially Applied Tracers Silt Loam Soil. Soil Science Society of America Journal, 64(4), 1296-1304. https://doi.org/10.2136/sssaj2000.6441296x Kladivko, E. J., Grochulska, J., Turco, R. F., Van Scoyoc, G. E., & Eigel, J. D. (1999). Pesticide and Nitrate Transport into Subsurface Tile Drains of Different Spacings. Journal of Environmental Quality, 28(3), 997-1004. https://doi.org/10.2134/jeq1999.00472425002800030033x S. A. Sichani, B. A. Engel, E. J. Monke, J. D. Eigel, & E. J. Kladivko. (1991). VALIDATING GLEAMS WITH PESTICIDE FIELD DATA ON A CLERMONT SILT LOAM SOIL. Transactions of the ASAE, 34(4), 1732-1737. https://doi.org/10.13031/2013.31794 Kladivko, E. J., Van Scoyoc, G. E., Monke, E. J., Oates, K. M., & Pask, W. (1991). Pesticide and Nutrient Movement into Subsurface Tile Drains on a Silt Loam Soil in Indiana. Journal of Environmental Quality, 20(1), 264-270. https://doi.org/10.2134/jeq1991.00472425002000010043x R. L. Huffman, E. J. Kladivko, & E. J. Monke. (1989). Pulsed Gas Bubbler for Water Level Monitoring. Applied Engineering in Agriculture, 5(1), 69-72. https://doi.org/10.13031/2013.26479 F. J. Larney, E. J. Kladivko, E. J. Monke, & J. V. Mannering. (1989). Corn Growth and Yield Behavior with Distance from Subsurface Drains in Drier-Than-Normal Growing Seasons. Transactions of the ASAE, 32(2), 0579-0587. https://doi.org/10.13031/2013.31042 F. J. Larney, E. J. Kladivko, & E. J. Monke. (1988). Subsurface Drain Spacing Effects on Soil Moisture Regime of Clermont Silt Loam. Transactions of the ASAE, 31(4), 1128-1134. https://doi.org/10.13031/2013.30833
Dataset DOI (digital object identifier)	10.4231/CTM1-0Y45
Product Type	Dataset
Related Content	Expansive agricultural dataset now available from Purdue University

Field	Value
ISO Topic(s)	environment farming inlandWaters
State or Territory	Indiana
National Agricultural Library Thesaurus Term	data collection subsurface drainage research projects agricultural research research programs National Institute of Food and Agriculture corn agrochemicals nitrate nitrogen nutrients pesticides soil drainage water atmospheric precipitation ammonium nitrogen dissolved organic carbon chlorides phosphorus pH crop yield soybeans water content experimental design agronomy nitrates water quality long term experiments Indiana
Ag Data Commons Keywords	Agroecosystems & Environment Agroecosystems & Environment Water Agroecosystems & Environment Water Water quality Agroecosystems & Environment Water Hydrology Plants & Crops Plants & Crops Crop production Plants & Crops Crop production Nutrient Management Agroecosystems & Environment Management Agroecosystems & Environment Soil

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