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Distinguished Professor of Agronomy
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About Robert Horton
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Distinguished Professor of Agronomy,
Iowa State University
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Articles
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Conference Proceedings
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Articles
(129)
Article
Simultaneous heat and mass transfer in soil columns exposed to ...
Soil Science (2000)
I. N. Nassar, Robert Horton and G. N. Flerchinger
Soil heat and mass transfer are important processes in nature The effects of soil solution concentration on soil heat and ...
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Article
A Time Domain Reflectometry Method to Measure Immobile Water Content ...
Soil Science Society of America Journal (2000)
Jaehoon Lee, Robert Horton and Dan B. Jaynes
Physical nonequilibrium of water and solute transport in soil has been reported. One of the most common mechanistic models used ...
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Article
Comparing Field Methods that Estimate Mobile–Immobile Model Parameters
Soil Science Society of America Journal (1999)
F. X. M. Casey, D. B. Jaynes, R. Horton and S. D. Logsdon
Recent studies have used field techniques that estimate soil hydraulic and solute transport parameters. These methods utilize a tension infiltrometer ...
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Article
Localized Soil Management in Fertilizer Injection Zone to Reduce Nitrate ...
Agronomy Journal (1998)
Daniel E. Ressler, Robert Horton, Thomas C. Kaspar and James L. Baker
Nitrogen fertilization of row crops in humid regions can result in leaching of NO3, which represents an inefficient use of ...
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Article
Analytical Solution for One-Dimensional Heat Conduction-Convection Equation
Soil Science Society of America Journal (1998)
Mingan Shao, Robert Horton and D. B. Jaynes
Coupled conduction and convection heat transfer occurs in soil when a significant amount of water is moving continuously through soil. ...
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Article
Evaluation of Localized Compaction and Doming to Reduce Anion Leaching ...
Journal of Environmental Quality (1998)
D. E. Ressler, R. Horton, J. L. Baker and T. C. Kaspar
Fertilizer N that leaches from the root zone is not available for uptake by plants and can be transported to ...
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Article
Measurement of Field Soil Hydraulic and Solute Transport Parameters
Soil Science Society of America Journal (1998)
Francis X. M. Casey, Sally D. Logsdon, Robert Horton and Dan B. Jaynes
Agricultural chemical presence in groundwater has drawn attention toward transport processes occurring in soil. Hydraulic conductivity (K) and water-holding capacity ...
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Article
Potential theory for dual-depth subsurface drainage of ponded land
Water resources research (1997)
Don Kirkham, R. R. van der Ploeg and Robert Horton
Dual-depth subsurface drainage is considered to be more effective in removing excess water from soil than single-depth drainage, but this ...
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Article
Immobile Water Content and Mass Exchange Coefficient of a Field ...
Soil Science Society of America Journal (1997)
F.X.M. Casey, Robert Horton, S. D. Logsdon and Dan Jaynes
Determining the preferential flow characteristics of a soil is important because agrichemicals can contaminate groundwater via preferential flow pathways. A ...
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Article
Testing a nitrogen fertilizer applicator designed to reduce leaching losses
Applied Engineering in Agriculture (1997)
D. E. Ressler, R. Horton, J. L. Baker and T. C. Kaspar
Conventional practices for nitrogen fertilization of corn produce soil conditions that are conducive to preferential water flow and nitrate leaching. ...
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Article
Managing Soil-Water and Chemical Transport with Subsurface Flow Barriers
Soil Science Society of America Journal (1996)
M. Kiuchi, Robert Horton and Tom C. Kaspar
Subsurface water-flow barriers have the potential for reducing NO3-N leaching and may improve fertilizer-use efficiency in cropping systems. This concept ...
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Article
Thermally induced water movement in uniform clayey soil
Soil Science (1996)
I. N. Nassar, J. G. Benjamin and R. Horton
Drying of a soil surface can lead to cracking, thereby creating large channels for waste to leach out of a ...
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Article
Infiltration and macroporosity under a row crop agricultural field in ...
Soil Science (1996)
B. P. Mohanty, R. Horton and M. D. Ankeny
Previous field-scale infiltration studies showed difference in the magnitude and the trend of spatial variation of infiltration rates under different ...
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Article
Crop Residue Effects on Surface Radiation and Energy Balance - Review
Theoretical and Applied Climatology (1996)
R. Horton, K. L. Bristow, G. J. Kluitenberg and T. J. Sauer
Crop residues alter the surface properties of soils. Both shortwave albedo and longwave emissivity are affected. These are linked to ...
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Article
Field Method for Measuring Mobile/Immobile Water Content and Solute ...
Soil Science Society of America Journal (1995)
D.B. Jaynes, S. D. Logsdon and Robert Horton
Numerous field and laboratory studies have documented the occurrence of preferential transport of solutes due to a fraction of the ...
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Article
Spatial analysis of hydraulic conductivity measured using disc infiltrometers
Water Resources Research (1994)
Binayak P. Mohanty, Mark D. Ankeny, Robert Horton and Rameshwar S. Kanwar
Spatial variability of surface hydraulic properties and the extrinsic (e.g., traffic, cropping, etc.) and intrinsic (e.g., soil type, pore size ...
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Article
Spatio-Temporal Variability of Soil Temperature within Three Land Areas Exposed ...
Soil Science Society of America Journal (1994)
B.P. Mohanty, M. Th. van Genuchten, W.M. Klittich and Robert Horton
The rational (lateral) spacing between soil temperature sensors to obtain spatial independence of measurements in the field under various tillage ...
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Article
Leaching Characteristics of Repacked Soil Columns as Influenced by Subsurface ...
Soil Science Society of America Journal (1992)
M. Kiuchi, Robert Horton and Tom C. Kaspar
Reducing the leaching of NO−3-N is of great interest. The effects of different types of subsurface barriers on delaying and ...
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Article
The stream function of potential theory for a dual-pipe subirrigation-drainage ...
Water Resources Research (1992)
Don Kirkham and Robert Horton
An exact mathematical solution to Laplace's equation is presented for appropriate boundary conditions associated with the problem of dual-pipe subirrigation ...
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Article
A Robust-Resistant Approach to Interpret Spatial Behavior of Saturated Hydraulic ...
Water Resources Research (1991)
Binayak P. Mohanty, Rameshwar S. Kanwar and Robert Horton
A central Iowa glacial till soil under no-tillage condition was studied for its spatial behavior of saturated hydraulic conductivity (K) ...
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Article
Measurement of Field-Saturated Hydraulic Conductivity by Using Guelph and Velocity ...
Transactions of the ASAE (1990)
Rameshwar S. Kanwar, H. A. Rizvi, M. Ahmed, Robert Horton, et al.
Field experiments were conducted to evaluate the performance of two recently developed in situ techniques to measure saturated hydraulic conductivity ...
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Article
Traffic and soil amendment effects on infiltration and compaction
Transactions of the ASAE (1990)
J. M. Hamlett, S. W. Melvin and R. Horton
Poor soil physical properties that limit water movement, root development, and soil aeration are believed by many to be a ...
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Article
Water and anion movement under ridge tillage: A field study
Transactions of the ASAE (1990)
J. M. Hamlett, J. L. Baker and R. Horton
A ridge-tillage configuration, with placement of nitrate-nitrogen (NO3-N) or its source in the elevated portion of the ridge, can potentially ...
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Article
Characterization of Tillage and Traffic Effects on Unconfined Infiltration Measurements
Soil Science Society of America Journal (1989)
Mark D. Ankeny, Tom C. Kaspar and Robert Horton
Tillage and wheel-traffic compaction alter pore structure and hydraulic properties of agricultural soils. These alterations will affect root growth and ...
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Article
Recompact Iowa Soil Materials Before Using as Liners for Waste ...
Journal of the Iowa Academy of Science (1988)
G. J. Kluitenberg, R. Horton, M. L. Thompson and J. F. McBride
Soil materials are often used in hazardous-waste disposal facilities to provide a physical barrier to leachate movement. Both existing soils ...
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