A mathematical model for variation in water-retention curves among sandy soils
Abstract Equations were developed to predict soil matric potential as a function of soil water content, texture and bulk density in sandy soils. The equations were based on the additivity hypothesis - that water-retention of a whole soil depends on the proportions of several particle size fractions,...
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Online Access: | http://dx.doi.org/10.1017/s0954102007000703 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102007000703 |
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crcambridgeupr:10.1017/s0954102007000703 2024-03-03T08:39:25+00:00 A mathematical model for variation in water-retention curves among sandy soils Hunt, H.W. Treonis, A.M. Wall, D.H. Virginia, R.A. 2007 http://dx.doi.org/10.1017/s0954102007000703 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102007000703 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 19, issue 4, page 427-436 ISSN 0954-1020 1365-2079 Geology Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2007 crcambridgeupr https://doi.org/10.1017/s0954102007000703 2024-02-08T08:38:22Z Abstract Equations were developed to predict soil matric potential as a function of soil water content, texture and bulk density in sandy soils. The equations were based on the additivity hypothesis - that water-retention of a whole soil depends on the proportions of several particle size fractions, each with fixed water-retention characteristics. The new model is an advancement over previously published models in that it embodies three basic properties of water-retention curves: a) matric potential is zero at saturation water content, b) matric potential approaches -∞ as water content approaches zero, and c) volumetric water content in dry soil is proportional to bulk density. Values of model parameters were taken from the literature, or estimated by fitting model predictions to data for sandy soils with low organic matter content. Most of the variation in water-release curves in the calibration data was explained by texture, with negligible effects of bulk density and sand particle size. The model predicted that variation in clay content among soils within the sand and loamy sand textural classes had substantial effects on water-retention curves. An understanding of how variation in texture among sandy soils contributes to matric potential is necessary for interpreting biological activity in arid environments. Article in Journal/Newspaper Antarctic Science Cambridge University Press Antarctic Science 19 4 427 436 |
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Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Geology Ecology, Evolution, Behavior and Systematics Oceanography Hunt, H.W. Treonis, A.M. Wall, D.H. Virginia, R.A. A mathematical model for variation in water-retention curves among sandy soils |
topic_facet |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract Equations were developed to predict soil matric potential as a function of soil water content, texture and bulk density in sandy soils. The equations were based on the additivity hypothesis - that water-retention of a whole soil depends on the proportions of several particle size fractions, each with fixed water-retention characteristics. The new model is an advancement over previously published models in that it embodies three basic properties of water-retention curves: a) matric potential is zero at saturation water content, b) matric potential approaches -∞ as water content approaches zero, and c) volumetric water content in dry soil is proportional to bulk density. Values of model parameters were taken from the literature, or estimated by fitting model predictions to data for sandy soils with low organic matter content. Most of the variation in water-release curves in the calibration data was explained by texture, with negligible effects of bulk density and sand particle size. The model predicted that variation in clay content among soils within the sand and loamy sand textural classes had substantial effects on water-retention curves. An understanding of how variation in texture among sandy soils contributes to matric potential is necessary for interpreting biological activity in arid environments. |
format |
Article in Journal/Newspaper |
author |
Hunt, H.W. Treonis, A.M. Wall, D.H. Virginia, R.A. |
author_facet |
Hunt, H.W. Treonis, A.M. Wall, D.H. Virginia, R.A. |
author_sort |
Hunt, H.W. |
title |
A mathematical model for variation in water-retention curves among sandy soils |
title_short |
A mathematical model for variation in water-retention curves among sandy soils |
title_full |
A mathematical model for variation in water-retention curves among sandy soils |
title_fullStr |
A mathematical model for variation in water-retention curves among sandy soils |
title_full_unstemmed |
A mathematical model for variation in water-retention curves among sandy soils |
title_sort |
mathematical model for variation in water-retention curves among sandy soils |
publisher |
Cambridge University Press (CUP) |
publishDate |
2007 |
url |
http://dx.doi.org/10.1017/s0954102007000703 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102007000703 |
genre |
Antarctic Science |
genre_facet |
Antarctic Science |
op_source |
Antarctic Science volume 19, issue 4, page 427-436 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102007000703 |
container_title |
Antarctic Science |
container_volume |
19 |
container_issue |
4 |
container_start_page |
427 |
op_container_end_page |
436 |
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1792494948660019200 |