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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 104134
Title Immobilization and mineralization of nitrogen in pasture soil
show extra info.
J.L.M. Huntjens
Author(s) Huntjens, J.L.M.
Publisher Wageningen : Pudoc
Publication year 1972
Description 72 p
Notes Proefschrift Wageningen
ISBN 902200404X
Tutors Mulder, Prof. Dr. Ir. E.G.
Graduation date 1972-11-03
Dissertation no. 532
Author abstract show abstract

The results obtained from turf samples indicate that growing plants are mainly responsible for the accumulation of soil organic nitrogenous compounds. Mixing of the soil of turf samples containing living plants did not stimulate the release of soil organic N.

Addition of unlabeled (NH 4 ) 2 SO 4 did not promote the liberation of labeled nitrogen (N 15) recently immobilized in turf samples with living grass plants. This labeled part was mineralized more readily than the originally present soil organic matter upon killing of the grass plants.

The amino acid patterns of the hydrolysates of pasture soil, arable land and the humic acids of these soils were rather similar, resembling the amino acid composition of the hydrolysates of the 'humic acids' produces by streptomycetes in a glycerol-nitrate medium.

Soil organic matter was used as the only N source for the growth of a proteolytic Pseudomonas strain. The results obtained suggest that more protein-like material is incorporated in the soil organic matter of pasture than in that of arable land. The availability of N of 'humic acids', synthesized by a Streptomyces strain, to the Pseudomonas sp. was similar to that of humic acids extracted from grassland by NaOH.

Online full textINTERNET
On paper FORUM ; STACKS ; NN08200,532
FORUM ; STACKS ; NN08202,532
Keyword(s) (cab) bacteria / carbon-nitrogen ratio / grasslands / nitrogen / nitrogen cycle / soil
Categories Rhizosphere, Mycorrhizae
Publication type PhD thesis
Language English
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