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 487799
Title Morfologische onderzoekingen over de bodemstructuur
Author(s) Jongerius, A.
Source Wageningen University. Promotor(en): C.H. Edelman. - 's-Gravenhage : Staatsdrukkerij - 93
Department(s) Soil Survey Institute
Publication type Dissertation, internally prepared
Publication year 1957
Keyword(s) bodemstructuur - bodemdeeltjes - grondanalyse - bodemtextuur - grondmechanica - deeltjesgrootteverdeling - soil structure - aggregates - soil analysis - soil texture - soil mechanics - particle size distribution
Categories Soil Physics
Abstract Various definitions of soil structure were reviewed and discussed. Soil structure was finally defined as 'the spatial arrangement of the elementary constituents and any aggregates thereof, and of the cavities occurring in the soil'.

The macrostructures, visible to the naked eye or with a lens not exceeding 4 x linear were divided into two large groups: those consisting of structural elements and those without these units.

A more detailed classification of the elements, formed by geological processes, was found necessary. Special attention was paid to the internal porosity of the elements and to the occurrence of various types of coatings and root prints.

The concept of grade of structure was discussed, and a scheme of description modified.

A classification of structures without structural elements was developed in which emphasis was placed on porosity.

Samples of higher sandy soils, underlying forest and heath, were described to demonstrate specific microstructures seen in thin sections.

Brown podsolic soils and podsols were shown to have characteristic differences in the morphology and mechanical behaviour of humus components.

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