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.

    We have a manual that explains all the features 

    Records 1 - 7 / 7

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    Induration of C horizons by allophane and imogolite in Costa Rican volcanic soils
    Jongmans, A.G. ; Denaix, L. ; Oort, F. van; Nieuwenhuyse, A. - \ 2000
    Soil Science Society of America Journal 64 (2000). - ISSN 0361-5995 - p. 254 - 262.
    vulkanische gronden - bodemmicromorfologie - costa rica - volcanic soils - soil micromorphology - costa rica
    Mineral micro- and nano-variability revealed by combined micromorphology and in situ submicroscopy
    Jongmans, A.G. ; Oort, F. van; Denaix, L. ; Jaunet, A.M. - \ 1999
    Catena 35 (1999). - ISSN 0341-8162 - p. 259 - 279.
    bodemmicromorfologie - verwering - soil micromorphology - weathering
    Transmission x-ray diffraction of undisturbed soil microfabrics obtained by microdrilling in thin sections
    Denaix, L. ; Oort, F. van; Pernes, M. ; Jongmans, A.G. - \ 1999
    Clays and Clay Minerals 47 (1999)5. - ISSN 0009-8604 - p. 637 - 646.
    bodemmicromorfologie - kleimineralen - röntgenstraling - grondanalyse - soil micromorphology - clay minerals - x radiation - soil analysis
    Clay mineralogical studies by X-ray diffraction performed on extracted <2-μm fractions do not always represent all clay mineral constituents present in the soil. In this work, transmission X-ray diffraction (TXRD) was applied to undisturbed microsamples of optically homogeneous mineral soil fabrics and features. These microsamples were isolated by microdrilling their periphery in soil thin sections, then removing them, and transferring them to glass capillaries for TXRD analysis. The usefulness of this technique for supplying in situ mineralogical information on identification, structure, and natural orientation of soil constituents was tested on mineral microfabrics and features of primary and secondary phyllosilicates. The study demonstrated that TXRD allowed detailed, representative interpretations of undisturbed mineral features and fabrics. In particular, this technique allowed us (1) to compare mineralogical compositions at selected microlocalities, (2) to study natural preferred orientations, and (3) to detect small amounts of minor mineral interstratification phases. In addition, complementary information on crystallography and crystal chemistry may be obtained by performing analytical transmission electron microscopy on the same microsample. | Clay mineralogical studies by X-ray diffraction performed on extracted <2-μm fractions do not always represent all clay mineral constituents present in the soil. In this work, transmission X-ray diffraction (TXRD) was applied to undisturbed microsamples of optically homogeneous mineral soil fabrics and features. These microsamples were isolated by microdrilling their periphery in soil thin sections, then removing them, and transferring them to glass capillaries for TXRD analysis. The usefulness of this technique for supplying in situ mineralogical information on identification, structure, and natural orientation of soil constituents was tested on mineral microfabrics and features of primary and secondary phyllosilicates. The study demonstrated that TXRD allowed detailed, representative interpretations of undisturbed mineral features and fabrics. In particular, this technique allowed us (1) to compared mineralogical compositions at selected microlocalities, (2) to study natural preferred orientations, and (3) to detect small amounts of minor mineral interstratification phases. In addition, complementary information on crystallography and crystal chemistry may be obtained by performing analytical transmission electron microscopy on the same microsample.
    Induration of soil horizons by Allophane and Imogolite in Costa Rican Volcanic soils.
    Jongmans, A.G. ; Denaix, L. ; Oort, F. van; Nieuwenhuyse, A. - \ 1998
    In: 1998 Annual meeting: American society of Agronomy crop science society of America soil science society of America, Baltimore, USA - p. 253 - 253.
    Isotropic smectite coatings and Speroids in holocene volcanic deposits under temperate climate, France.
    Jongmans, A.G. ; Denaix, L. ; Oort, F. van - \ 1998
    Soil Science Society of America Journal 62 (1998). - ISSN 0361-5995 - p. 287 - 295.
    Isotropic smectite coatings and spheroids in Holocene volcanic deposits under temperate climate (France).
    Jongmans, A.G. ; Denaix, L. ; Oort, F. van - \ 1996
    In: Abstract Annual Meeting American Society of Agronomy, Indianapolis, Indiana - p. 317 - 317.
    Study of clay micro-structures inherited from volcanic rock: consequences for soil formation and erosion.
    Oort, F. van; Denaix, L. ; Jongmans, A.G. - \ 1995
    In: TERRA abstracts: EUG 8, Strasbourg, France - p. 253 - 253.
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