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 104662
Title Bloei en bloeislaging van de robusta koffie op Sumatra's Westkust
show extra info.
door W.J. Deenen
Author(s) Deenen, W.J.
Publisher Wageningen : Veenman
Publication year 1936
Description 120, [18] p
Notes Proefschrift Wageningen
Tutors Stok, Prof. J.E. van der
Graduation date 1936-01-30
Dissertation no. 90
Author abstract show abstract
As an insight into flowering and fruit yield the percentage of flowers yielding fruits was estimated. To allow for variation between branches, many flowers must be taken. The extent of flowering of robusta coffee depended on the relation between vegetative and generative growth, both showing a maximum and a minimum, while factors favouring one were often adverse-for the other. The physiological condition of the trees strongly influenced fruit setting. Stephanoderes hampei F. may penetrate berries 3-5 months old. Consequently rotting and damage may lead to a considerable fall. This fall depended much on the condition of the tree and not on the number of S.hampei. Falling was also favoured by sunny and dry periods.

A good regular shading promoted flowering and fruit production, due mainly to a better water supply preventing yellowing and dying of the leaves. Too much shading may be harmful to the generative growth, so pruning must lead to more light during wetter months. For a better water supply the humus content of the soil could be improved. The percentage fruit set of primary, secondary, upper, medium and low branches showed that 'topping', preventing water shortage in dry periods, was not harmful for fruit set. Lower trees also facilitate the control of S.hampei and the harvesting.

Online full textINTERNET
On paper FORUM ; SPEC.COLL. ; A2096,1936,2
FORUM ; STACKS ; NN08202,90
Keyword(s) (cab) coffee / flowering / sumatra / netherlands east indies
Categories Stimulant Crops
Publication type PhD thesis
Language Dutch; Flemish
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