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 104464
Title Het tapsysteem bij Hevea brasiliensis op experimenteelen grondslag
show extra info.
door Johan Gerard Joseph Adriaan Maas
Author(s) Maas, J.G.J.A.
Publisher Amsterdam : Bussy
Publication year 1924
Description 202 p.
Notes Proefschrift Wageningen
Tutors Roepke, Prof. Dr. W.K.J.
Graduation date 1924-10-22
Dissertation no. 12
Author abstract show abstract
The history of the rubber culture and the historical development of tapping systems in South America and Asia were discussed. The tapping systems were then analysed for many factors: the influence of number, length, direction, inclination, depth, height from the ground and consecutive position of tapping faces on the latex production. Also the influence of cutting hour, cutting frequency and rest periods was studied. The influence of the amount of bark cut on yield and the influence of the age of the bark on the regeneration process were considered. The influence of external factors on diameter and number of latex vessels in the bark was also studied.

The choice of a tapping system was considered from an economic aspect. An analysis was made of cost price and tapping labour. Suggestions were advanced to change the tapping system on the ground of this labour analysis.

At that time the trend of development of the tapping systems was still towards less damage to bark. Economic considerations had little influence on the choice of tapping system. But sometimes less frequent cutting was more profitable, even more so on occasion by larger cuts.

Online full textINTERNET
On paper FORUM ; SPEC.COLL. ; C1658
FORUM ; SPEC.COLL. ; A2096,1924,03
FORUM ; STACKS ; NN8202,12
Keyword(s) (cab) tapping / hevea / sumatra / netherlands east indies
Categories Exudate Producing Crops
Publication type PhD thesis
Language Dutch; Flemish
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