Title
Extraction of soil solution by drainage centrifugation—effects of centrifugal force and time of centrifugation on soil moisture recovery and solute concentration in soil moisture of loess subsoils
Author
Fraters, D.
Boom, G.J.F.L.
Boumans, L.J.M.
de Weerd, H.
Wolters, M.
Publication year
2017
Abstract
The solute concentration in the subsoil beneath the root zone is an important parameter for leaching assessment. Drainage centrifugation is considered a simple and straightforward method of determining soil solution chemistry. Although several studies have been carried out to determine whether this method is robust, hardly any results are available for loess subsoils. To study the effect of centrifugation conditions on soil moisture recovery and solute concentration, we sampled the subsoil (1.5–3.0 m depth) at commercial farms in the loess region of the Netherlands. The effect of time (20, 35, 60, 120 and 240 min) on recovery was studied at two levels of the relative centrifugal force (733 and 6597g). The effect of force on recovery was studied by centrifugation for 35 min at 117, 264, 733, 2932, 6597 and 14,191g. All soil moisture samples were chemically analysed. This study shows that drainage centrifugation offers a robust, reproducible and standardised way for determining solute concentrations in mobile soil moisture in silt loam subsoils. The centrifugal force, rather than centrifugation time, has a major effect on recovery. The maximum recovery for silt loams at field capacity is about 40%. Concentrations of most solutes are fairly constant with an increasing recovery, as most solutes, including nitrate, did not show a change in concentration with an increasing recovery. © 2017, The Author(s).
Subject
Urban Mobility & Environment
EMS - Environmental Modelling, Sensing & Analysis
ELSS - Earth, Life and Social Sciences
Environment & Sustainability
Environment
Urbanisation
Centrifuge drainage
Leaching
Nutrients
Pore water
Silt loam
Water recovery
To reference this document use:
http://resolver.tudelft.nl/uuid:e5c04dbe-239c-4039-a241-5a0dc7643be4
DOI
https://doi.org/10.1007/s10661-017-5788-7
TNO identifier
745609
Publisher
Springer International Publishing
ISSN
0167-6369
Source
Environmental Monitoring and Assessment, 189 (2), 1-18
Article number
83
Bibliographical note
Funding details: M/350001, EZ, Ministerie van Economische Zaken
Document type
article