Differences between super-centrifuged and membrane-filtrated soil solutions obtained from bulked and non-bulked topsoils by soil centrifugation.
The composition of the soil solution must be known to estimate the mobility and availability of plant nutrients and contaminants. When soil centrifugation is used to obtain the soil water for analysis, bulked soil samples are normally used in order to reduce random variations. In the present study, large systematic differences between the centrifugates from bulked and core samples are reported. For most of the soil solution components, no, or only small differences could be detected between super-centrifuged and membrane-filtrated solutions.
Castilho Pd
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DLO Research Institute for Agrobiology and Soil Fertility (AB-DLO), PO Box 129, NL-9750 AC, Haren, The Netherlands.
Van Faassen
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Moerman
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