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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 104028
Title Cation selectivity and cation-anion balance as factors governing the mineral composition of pasture herbage
show extra info.
I.M. Said
Author(s) Said, I.M.
Publisher Wageningen : Pudoc
Publication year 1959
Description VI, 64 p ill
Notes Proefschrift Wageningen
Ook verschenen als handelsuitgave
ISBN 9022000273
Tutors Hart, Prof. Ir. M.L. 't
Graduation date 1959-10-21
Dissertation no. 264
Author abstract show abstract
The ability was investigated of two grasses Dactylis glomerata and Lolium perenne to take up K, Na, Mg, Ca, F, S and N from solutions, from soil and from fertilizers. The ratio of the cations and anions in the herbage was estimated. The difference in cation composition of grass species was related to the difference in selectivity between K, Na, Mg and Ca.

Total uptake of cation equivalents in herbage was shown to be determined by the total uptake of anion equivalents and by an internal factor, related to metabolism which determined the cation-anion balance.

The proportions of K, Na, Mg and Ca in total cations depended on availability as well as on the selectivity of the grass species.

If availability and selectivity did not give rise to internal deficiencies of some elements, growth and assimilation could proceed.

Mineral composition resulting from these processes could vary within limits. It was determined both by availibility of various elements and by plant species.

Online full textINTERNET
On paper FORUM ; STACKS ; NN08202,264
Keyword(s) (cab) botany / plant nutrition / fertilizers / manures / fodder grasses
Categories Chemical Composition, Nutritive Value / Fertilizers, Fertilizer Application
Publication type PhD thesis
Language English
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