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Library Catalogue

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    Union Catalogue of Agricultural Libraries in the Netherlands

    The WUR Library Catalogue contains bibliographic data on books and periodicals held by the libraries of Wageningen University and Research Centre and some 15 associated libraries. Holding data are added to each record.

    Subjects covered include Agrotechnology, Food and Food Production, Plant and Animal Sciences, Soil Science, Geo-information, Landscape and Spatial Planning, Water and Climate, Ecosystem Studies, Economics and Society.

    The joint collections of the participating libraries cover a substantial part of the internationally available scientific literature in these disciplines.

    As far as Dutch scientific literature in these fields is concerned, coverage can be considered near 100%, including much of the so-called "grey literature".

    All titles are entered in their original language. Keywords are added to facilitate subject searching.

    The database is updated every day and now contains over 830.000 records.

Record number 104645
Title A study on the nature of clay
show extra info.
door R.H.J. Roborgh
Author(s) Roborgh, R.H.J.
Publisher Wageningen : Veenman
Publication year 1935
Description 127 p
Notes Proefschrift Wageningen
Tutors Hudig, Prof. Ir. J.
Graduation date 1935-03-01
Dissertation no. 85
Author abstract show abstract
The study was intended to elucidate by HCl extraction the composition of that part of the clay fraction, essential for adsorption phenomena in the soil and also its resistance to attack by HCl.

HCI extraction of 12 alluvial clay soils did not indicate the composition of the adsorption complex, as the analyses of the HCl extracts showed very different values for the composition of the Al-Fe-Si-complexes which were brought into solution, whereas the values for adsorption and residual adsorption showed that the chemical composition of the adsorptive parts of the clay fraction < 2μof the different soils was uniform.

The uniformity of the clay fractions of the 12 soils in adsorption capacity, behaviour towards HCl extraction and the influence of this extraction on adsorption values suggested that the soils could be of the same mineralogical origin. However total analyses of the clay fraction yielded divergent SiO 2 : Al 2 O 3 and SiO 2 : sesquioxide ratios for the different soils.

Therefore it was supposed that only the films of the hydrolytic products of the minerals present in clay were identical.

Online full textINTERNET
On paper FORUM ; SPEC.COLL. ; A2096,1935,2
FORUM ; STACKS ; NN08202,85
Keyword(s) (cab) clay soils / clay minerals / absorption / adsorption
Categories Soil Classification
Publication type PhD thesis
Language English
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