Anion Transport in a Piedmont Ultisol: II. Local-Scale Parameters

Gupte, S. M.; Radcliffe, D. E.; Franklin, Dorcas H.; West, L. T.; Tollner, E. W.; Hendrix, Paul F.

doi:10.2136/sssaj1996.03615995006000030012x

Cited by 21 publications

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“…This distribution pattern corresponded well with previously reported column experiments that also found the majority of soil‐bound hormone within the top 10 cm (Casey et al, 2003, 2004). Furthermore, an earlier study at this site found that preferential flow begins below the 10‐cm depth of tillage (Gupte et al, 1996), so more sorption in the 0‐ to 10‐cm depth is expected.…”

Section: Resultsmentioning

confidence: 88%

Sorption and Transport of 17β‐Estradiol and Testosterone in Undisturbed Soil Columns

et al. 2006

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Land-applied domestic animal wastes contain appreciable amounts of 17beta-estradiol (henceforth, estradiol) and testosterone. These sex hormones may be transported through soil to groundwater and streams, where they may adversely affect the environment. Previous column transport studies with these hormones used repacked soil and did not consider preferential flow. We, therefore, determined the sorption and transport characteristics of estradiol and testosterone in undisturbed soil columns (15-cm i.d. by 32-cm height). In the sorption experiment, isotherms for estradiol and testosterone were nonlinear with Freundlich exponents (n) less than one. Sorption of both hormones decreased with soil depth, and estradiol sorbed more strongly than testosterone. Average estradiol Freundlich sorption coefficients (K(f)) values were 36.9 microg(1 - n) mL(n) g(-1) for the 0- to 10-cm soil depth and 25.7 microg(1 - n) mL(n) g(-1) for the 20- to 30-cm soil depth. Average testosterone K(f) values were 26.7 microg(1 - n) mL(n) g(-1) for the 0- to 10-cm soil depth and 14.0 microg(1 - n) mL(n) g(-1) for the 20- to 30-cm soil depth. In the transport experiment, 27% of the estradiol and 42% of the testosterone leached through the soil columns. Approximately 50% of the remaining soil-bound hormones were sorbed in the top 10 cm of soil. In almost all instances, breakthrough concentrations of estradiol, testosterone, and a chloride tracer peaked simultaneously. Simultaneous breakthrough and HYDRUS-1D transport parameters indicated both chemical and physical nonequilibrium processes affected hormone transport. This suggests hormones placed on soil surfaces may contaminate groundwater under conditions of preferential flow.

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Section: Resultsmentioning

confidence: 88%

Sorption and Transport of 17β‐Estradiol and Testosterone in Undisturbed Soil Columns

et al. 2006

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“…In 1992, preferential flow paths were evaluated in the upper horizons from forty soil columns, each 15-cm diameter and 30-60 cm length, collected from one of two similarly established plots adjacent to the 12 plot instrumented facility (Gupte et al 1996;Radcliffe et al 1996;Franklin et al 2007). The area containing the plots had been in conventionally tilled row crops for at least 10 years.…”

Section: Experimental Sitementioning

confidence: 99%

“…Preferential flow paths identified with methylene blue indicated abundant water transmission through the Ap and BA horizons (dye-stained area was greater than 95%; Franklin et al 2007). The Bt horizon had lower flow (60-80% staining) and preferential flow began just above the Bt and BA interface (Gupte et al 1996). The Ap horizon had a sandy loam texture, weak structure, and pores that were predominantly coarse packing voids.…”

Section: Experimental Sitementioning

confidence: 99%

Management implications of conservation tillage and poultry litter use for Southern Piedmont USA cropping systems

Endale

Schomberg

Jenkins

et al. 2009

Nutr Cycl Agroecosyst

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“…Overall, the average local-scale transfer function parameters were not significantly different from the field-scale surface parameters. Similarly, Gupte et al (1996) found small differences between field-scale and local-scale parameters. In contrast, Jacques et al (1997) found greater differences between the local-scale and field-scale transfer function parameters particularly near the surface in unsaturated soil.…”

Section: Near-surface Time Domain Reflectometry Measured Concentrationsmentioning

confidence: 81%

Measured and Predicted Solute Transport in a Tile Drained Field

Gaur

Horton

Jaynes³

et al. 2006

Soil Science Soc of Amer J

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Most solute transport measurement techniques are tedious and require extensive soil excavation. A field experiment was conducted to evaluate whether surface transport properties determined by a nondestructive time domain reflectometry (TDR) technique could be used to accurately predict tile flux concentrations. A 14 by 14 m field plot selected above a 1.1-m deep tile drain was studied. Low electrical conductivity (EC) water was sprinkled on the plot surface, and after reaching a steady-state condition, a pulse of calcium chloride solution (16.3 cm) with an EC of 23 dS m −1 was applied through the same sprinklers. Time domain reflectometry equipment was used to record the change in EC of surface (∼ top 2 cm) soil at 45 locations. The EC of the tile drainage flow was measured continuously with an EC probe. The surface convective lognormal transfer (CLT) function parameters, log mean irrigation depth, μ I , and its standard deviation, σ I , were found to be 3.44 and 0.94 [ln(cm)], respectively, for a reference depth of 110 cm. These surface parameters were used in a one-dimensional RightsWorks produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.This article is available at Iowa State University Digital Repository: https://lib.dr.iastate.edu/agron_pubs/370 Measured and Predicted Solute Transport in a Tile Drained FieldAnju Gaur, Robert Horton,* Dan B. Jaynes, and James L. Baker ABSTRACT Most solute transport measurement techniques are tedious and require extensive soil excavation. A field experiment was conducted to evaluate whether surface transport properties determined by a nondestructive time domain reflectometry (TDR) technique could be used to accurately predict tile flux concentrations. A 14 by 14 m field plot selected above a 1.1-m deep tile drain was studied. Low electrical conductivity (EC) water was sprinkled on the plot surface, and after reaching a steady-state condition, a pulse of calcium chloride solution (16.3 cm) with an EC of 23 dS m 21 was applied through the same

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Anion Transport in a Piedmont Ultisol: II. Local-Scale Parameters

Cited by 21 publications

References 0 publications

Sorption and Transport of 17β‐Estradiol and Testosterone in Undisturbed Soil Columns

Sorption and Transport of 17β‐Estradiol and Testosterone in Undisturbed Soil Columns

Management implications of conservation tillage and poultry litter use for Southern Piedmont USA cropping systems

Measured and Predicted Solute Transport in a Tile Drained Field

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