A Robust-Resistant Approach to Interpret Spatial Behavior of Saturated Hydraulic Conductivity of a Glacial Till Soil Under No-Tillage System

dc.contributor.author Kanwar, Rameshwar
dc.contributor.author Mohanty, Binayak
dc.contributor.author Kanwar, Rameshwar
dc.contributor.author Horton, Robert
dc.contributor.author Horton, Robert
dc.contributor.department Agricultural and Biosystems Engineering
dc.date 2018-02-17T06:13:25.000
dc.date.accessioned 2020-06-29T22:41:55Z
dc.date.available 2020-06-29T22:41:55Z
dc.date.copyright Tue Jan 01 00:00:00 UTC 1991
dc.date.issued 1991-11-01
dc.description.abstract <p>A central Iowa glacial till soil under no-tillage condition was studied for its spatial behavior of saturated hydraulic conductivity (<em>K</em>) at the surface soil layers. Hydraulic conductivity measurements both in situ and in the laboratory were made at two depths of 15 and 30 cm at regular intervals of 4.6 m on two perpendicular transects crossing each other at the center of the field. Simplified split-window median polishing in conjunction with a robust semivariogram estimator were used to examine the spatial structure of the glacial till material. Results of this study indicated a nested structure of <em>K</em> at 30 cm depth. Soil clustering at the experimental site at intervals of 20 m, in addition to the soil microheterogeneity, contributed to variation in <em>K</em>, with an overall range of spatial dependence of <em>K</em> up to 60 m. Medians of split windows of 23 m width were found to be the “solo representatives” or “summary points” of the soil clusters contributing to spatial structure. In situ and laboratory measurements for <em>K</em> showed consistency in their trends even though some parametric variations were observed. <em>K</em> values observed near the soil surface at a depth of 15 cm were dominated by white noise and directional trends.</p>
dc.description.comments <p>This article is from Water Resour. Res., 27(11), 2979–2992, doi:<a href="http://dx.doi.org/10.1029/91WR01720" target="_blank">10.1029/91WR01720</a>. Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/abe_eng_pubs/695/
dc.identifier.articleid 1981
dc.identifier.contextkey 7850377
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath abe_eng_pubs/695
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/1488
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/abe_eng_pubs/695/1991_Mohanty_RobustResistant.pdf|||Sat Jan 15 01:31:14 UTC 2022
dc.source.uri 10.1029/91WR01720
dc.subject.disciplines Agricultural Science
dc.subject.disciplines Agriculture
dc.subject.disciplines Agronomy and Crop Sciences
dc.subject.disciplines Bioresource and Agricultural Engineering
dc.subject.disciplines Hydrology
dc.subject.disciplines Water Resource Management
dc.title A Robust-Resistant Approach to Interpret Spatial Behavior of Saturated Hydraulic Conductivity of a Glacial Till Soil Under No-Tillage System
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 5210e67e-b8da-4e17-be3f-843a09381196
relation.isAuthorOfPublication d3fb0917-6868-417e-9695-a010896cfafa
relation.isOrgUnitOfPublication 8eb24241-0d92-4baf-ae75-08f716d30801
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