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Effect of air-drying on the water retention curves of disturbed samples of three soils od Costa Rica derived from volcanic ash

Logarithmic regression curves of soil moisture retention were determined and found to be of the best fit to data from air-dried, field-moistened samples of Hydric Dysthandepts. When air-dried samples were previously field-moistened, the curves demonstrate in a statistically significant manner, a gre...

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Main Authors: Vazquez, Orlando, Forsythe, W.M.
Format: Artículo
Language:Inglés
Published: Instituto Interamericano de Cooperación para la Agricultura (IICA) 2025
Subjects:
Retención de agua por el suelo||soil water retention||retenção da água pelo solo||rétention hydrique du sol
Material volcánico||volcanic materials||material vulcânico||matériau volcanique
Zona volcánica||volcanic areas||área vulcânica||zone volcanique
Suelo volcánico||volcanic soils||solo vulcânico||sol volcanique
Secado por aire||air drying||secagem ao ar||séchage à l'air
Costa Rica||Costa Rica||Costa Rica||Costa Rica
Sede Central
Online Access:https://repositorio.catie.ac.cr/handle/11554/13000
Summary:Logarithmic regression curves of soil moisture retention were determined and found to be of the best fit to data from air-dried, field-moistened samples of Hydric Dysthandepts. When air-dried samples were previously field-moistened, the curves demonstrate in a statistically significant manner, a greater loss of moisture retention for Hydric Dysthandept that do not experience a dry season and have allophane as the predominant clay mineral than for those that do experience a dry season and have metabaloisite as the predominant clay mineral. The loss of water retention is greater at low suctions than at high suctions. The importance of determining vegetation curves for samples of Hydric Dystrandepts stored at field moisture is raised.

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