Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 428076
Title Mapping soil clay contents in Dutch marine districts using Gamma-ray spectrometry
Author(s) Klooster, E. van der; Sonneveld, M.P.W.; Egmond, F.M. van
Event 4th International Congress Eurosoil 2012; Soil Science for the Benefit of Mankind and Environment, 2012-07-02/2012-07-06
Department(s) Land Dynamics
PE&RC
Publication type Poster (professional)
Publication year 2012
Abstract Conventional soil sampling methods to obtain high-resolution soil data are costly. Recently, gamma ray spectrometry has emerged as a promising technique to overcome these obstacles. The objective of this study was to investigate the prediction of soil clay contents using gamma-ray spectrometry in three marine clay districts in the Netherlands: the southwestern marine district (SMD), the IJsselmeerpolder district (IJPD) and the northern marine district (NMD). The performance of linear regression models was investigated at field (1000 km2) scales and for all the Dutch marine districts together. For this study, a database was available with 1371 gamma-ray spectra measured on arable fields in marine clay districts during the period 2005–2008 and these were all linked to laboratory analyses of clay contents. At the field scale, linear regression models based on 40K, 232Th, or a combination of these revealed much smaller root mean squared error (RMSE) values (2–3%) compared with a model based on the field mean (8–10%). At the district scale, the regression models for the SMD and IJPD, which have comparable sediments, performed better than for the NMD. This indicates that the prediction of clay contents in late Holocene marine sediments may be made with gammaray spectrometry provided that the origin of the parent material results in a unique fingerprint.
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