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 104620
Title The application of foliar analysis in oil palm cultivation
show extra info.
door Hans Broeshart
Author(s) Broeshart, H.
Publisher 's-Gravenhage : Excelsior
Publication year 1955
Description 114 p ill
Notes Proefschrift Wageningen
Tutors Schuffelen, Prof. Dr. A.C.
Graduation date 1955-04-01
Dissertation no. 193
Author abstract show abstract
The chemical analysis of leaves was studied as an indication of fertilizer requirements of the oil-palm in the former Belgian Congo. Position and age of the leaf both markedly influenced chemical composition. Leaflets from the same position in leaf and plant must be compared. The age of the whole palm also had its influence; climatic influences also varied with age (generally more fluctuating in younger palms). Time of year significantly influenced leaf composition. Sampling in the rainy season was advised, between 07.00 h and 10.00 h. Analytical error should not exceed 10 %.

For 20 ha bulk samples of 20 to 25 palms should be taken; they give a sampling variation of the same order as the errors in chemical analysis. Two leaflets from each side of the middle part of the youngest leaf (with fully open leaflets) were taken. Chemical composition was directly related to growth and production of oil- palms. There was an 'optimum' leaf composition. Qualitative diagnosis of deficiencies should however be based on characteristic changes in leaf composition for all the elements (N, P, S, K, Ca, Mg, Mn, B, Cu, Zn). A deficiency of a minor element may effect contents of major elements. It was possible to approach the optimum leaf concentration by fertilizing.

Online full textINTERNET
On paper FORUM ; STACKS ; NN08202,193
Keyword(s) (cab) chemical composition / plants / chemical analysis / elaeis guineensis / oil palms / plant nutrition / fertilizers / manures / exposure / environmental degradation / kinetics / metabolism / ecotoxicology
Categories Oil Palms / Plant Composition
Publication type PhD thesis
Language English
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