Controlled drainage and subirrigation influences tile nitrate loss and corn yields in a sandy loam soil in Southwestern Ontario

Ng, H.Y.F.; Tan, C. S.; Drury, C. F.; Gaynor, J. D.

doi:10.1016/s0167-8809(01)00172-4

Cited by 71 publications

(36 citation statements)

References 22 publications

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“…Nitrogen cannot be used directly by the plants and animals until it is converted into its available compounds and forms. Nitrate ions in soil are usually in dissolved form in the soil solution, and it can easily be lost to leaching as water moves through the soil profile due to the rapid dynamism [15,16].…”

Section: Introductionmentioning

confidence: 99%

Modeling Agricultural Land Management to Improve Understanding of Nitrogen Leaching in an Irrigated Mediterranean Area in Southern Turkey

Karnez¹,

Sagir²,

Gavan³

et al. 2017

Water Quality

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Nitrogen (N) cycle dynamics and its transport in the ecosystem were always an attracting subject for the researchers. Calculation of N budget in agricultural systems with use of different empirical statistical methods is common practice in OECD and EU countries. However, these methodologies do not include climate and water cycle as part of the process. On the other hand, big scale studies are labor and work intensive. As a solution, various computer modeling approaches have been used to predict N budget and related N parameters. One of them is internationally established Soil and Water Assessment (SWAT) model, which was developed especially for modeling agricultural catchments. The aim of this study was to improve understanding of N leaching with simulation of agricultural land management (fertilization, irrigation, and plant species) in hydrological heavily modified watershed with irrigation-depended agriculture under Mediterranean climate. The study was conducted in Lower Seyhan River Plain Irrigation District (Akarsu) of 9495 ha in Cukurova region of southern Turkey. Intensive and extensive water and nitrogen monitoring data (2008)(2009)(2010)(2011)(2012)(2013)(2014), soil properties, cropping pattern, and crop rotation were used for the SWAT model build, calibration, and validation of the model.

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Section: Introductionmentioning

confidence: 99%

Modeling Agricultural Land Management to Improve Understanding of Nitrogen Leaching in an Irrigated Mediterranean Area in Southern Turkey

Karnez¹,

Sagir²,

Gavan³

et al. 2017

Water Quality

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“…Part of the problem is there are fewer CPs designed to target tile drainage than there are to target surface runoff. Two practices that have been advocated and researched include controlled drainage (Ng et al 2002;Fisher et al 1999) and nutrient removal wetlands (Kovacic et al 2000). Controlled drainage may be feasible in some parts of the South Fork, but it would probably require significant re-engineering of the drainage infrastructure.…”

Section: Discussionmentioning

confidence: 99%

Assessment of the Iowa River's South Fork watershed: Part 2. Conservation practices

Tomer¹,

Moorman²,

James³

et al. 2008

Journal of Soil and Water Conservation

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Documenting the types and extent of conservation practices in a watershed is necessary to determine their water quality impacts. A conservation practice inventory for the South Fork of the Iowa River, 85% in corn (Zea mays L.) and soybean [Glycine max L. (Merr.)] rotations, showed only 7% of cropland was managed using no-tillage. About 30% of cropland receives manure annually, prior to corn. Surface residue following soybean was usually inadequate (<30%), indicating a key management challenge. About 90% of fields with >34% highly erodible land, subject to USDA conservation compliance, indeed had erosion-control practices installed. Grassed waterways and riparian buffers were common edge-of-field practices, and highly erodible land fields near streams often had multiple practices and rotations including third crops. Yet, while most conservation practices are aimed at controlling runoff, tile drainage is the dominant hydrologic pathway. Resource management systems that address tile drainage as the primary route of nutrient loss need to be developed and encouraged. Better targeting of this pathway could include practices such as nutrient removal wetlands.

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“…In the past few decades, controlled tile drainage (CTD), a practice that regulates the amount of tile water that can leave a field, has been found to reduce mass fluxes of nutrients from fields (Evans et al, 1992;Lalonde et al, 1996) while improving crop yields (Tan et al, 1999;Ng et al, 2002;Wesström and Messing, 2007;Sunohara et al, 2014). Most of these findings, however, come from plot-or field-scale studies, and the net effects of CTD implementation at river basin scales on longer-term water quality and quantity trends are not well documented.…”

Section: Using Annagnps To Predict the Effects Of Tile Drainage Contrmentioning

confidence: 99%

Using AnnAGNPS to Predict the Effects of Tile Drainage Control on Nutrient and Sediment Loads for a River Basin

et al. 2015

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Controlled tile drainage (CTD) can reduce pollutant loading. The Annualized Agricultural Nonpoint Source model (AnnAGNPS version 5.2) was used to examine changes in growing season discharge, sediment, nitrogen, and phosphorus loads due to CTD for a ~3900-km 2 agriculturally dominated river basin in Ontario, Canada. Two tile drain depth scenarios were examined in detail to mimic tile drainage control for flat cropland: 600 mm depth (CTD 600 ) and 200 mm (CTD 200 ) depth below surface. Summed for five growing seasons (CTD 600 ), direct runoff, total N, and dissolved N were reduced by 6.6, 3.5, and 13.7%, respectively. However, five seasons of summed total P, dissolved P, and total suspended solid loads increased as a result of CTD 600 by 0.96, 1.6, and 0.23%. The AnnAGNPS results were compared with mass fluxes observed from paired experimental watersheds (250, 470 ha) in the river basin. The "test" experimental watershed was dominated by CTD and the "reference" watershed by free drainage. Notwithstanding environmental/land use differences between the watersheds and basin, comparisons of seasonal observed and predicted discharge reductions were comparable in 100% of respective cases. Nutrient load comparisons were more consistent for dissolved, relative to particulate water quality endpoints. For one season under corn crop production, AnnAGNPS predicted a 55% decrease (CTD 600 ) in dissolved N from the basin. AnnAGNPS v. 5.2 treats P transport from a surface pool perspective, which is appropriate for many systems. However, for assessment of tile drainage management practices for relatively flat tile-dominated systems, AnnAGNPS may benefit from consideration of P and particulate transport in the subsurface.

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Controlled drainage and subirrigation influences tile nitrate loss and corn yields in a sandy loam soil in Southwestern Ontario

Cited by 71 publications

References 22 publications

Modeling Agricultural Land Management to Improve Understanding of Nitrogen Leaching in an Irrigated Mediterranean Area in Southern Turkey

Modeling Agricultural Land Management to Improve Understanding of Nitrogen Leaching in an Irrigated Mediterranean Area in Southern Turkey

Assessment of the Iowa River's South Fork watershed: Part 2. Conservation practices

Using AnnAGNPS to Predict the Effects of Tile Drainage Control on Nutrient and Sediment Loads for a River Basin

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