Library Catalogue

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 104384
Title De betekenis van tweezaadlobbige graslandplanten voor de minerale samenstelling van weidegras
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door Frederik Karel van der Kley
Author(s) Kley, F.K. van der
Publisher Wageningen : Verweij
Publication year 1957
Description 50 p.
Series title Publicatie / Afdeling Graslandcultuur. Landbouwhogeschool (14)
Notes Proefschrift Wageningen
Tutors Hart, Prof. Ir. M.L. 't
Graduation date 1957-06-21
Dissertation no. 228
Author abstract show abstract
In 169 paddocks of widely different soil fertility three random samples, one of dicotyledons, one of associated grasses and one of the soil were obtained. The mineral compositions of Plantago lanceolata, Trifolium pratense and T.repens and Taraxacum officinale were compared with those of the corresponding grass samples. The variance of their differences was analysed and partial regressions of these differences on stage of growth, temperature and soil conditions were calculated.

Clovers and herbs were richest in Na 2 0, CaO and MgO, in cation excess, alkaline earth alkalinity, and to a lesser extent also in alkali alkalinity. These results were discussed from the aspect of mineral requirements for animals. The actual differences between dicotyledons and grasses varied greatly, however. The effects of herbs and clovers on the incidence of grass tetany was often small or absent.

This was explained by the observation that the preference K>Na>Mg>Ca was normally greater with cation intake by grasses than by dicotyledons. This might be related to the cation-exchange capacities of plant roots. At higher increments of soil K the effect of the root's cation-exchange capacity on K uptake decreased. Differences between dicotyledons may also be correlated with cation- exchange capacities of plant roots.

Online full textINTERNET
On paper FORUM ; STACKS ; 521F66
FORUM ; STACKS ; NN08202,228
Keyword(s) (cab) grasslands / feeds / composition / trifolium / clovers / additives / feed supplements / fodder grasses
Categories Grass Clover Pastures
Publication type PhD thesis
Language Dutch; Flemish
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