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 104308
Title Herkomstenonderzoek van de Douglas in Nederland
show extra info.
door Barend Veen
Author(s) Veen, B.
Publisher 's-Gravenhage : Excelsior
Publication year 1951
Description 130 p ill
Notes Proefschrift Wageningen
Tutors Houtzagers, Prof. Dr. G.
Graduation date 1951-12-20
Dissertation no. 168
Author abstract show abstract
Botany, strains and natural region (topography, geology, soil types, climate and ecology) were described for Pseudotsuga taxifolia (Poir.) Britt. in the coniferous forests of North West America. Seeds of 35 known provenances were introduced in different parts of the Netherlands between 1923 and 1930 and planted in pilot trials. Height after 10 and 15 years distinguished 4 quality classes for origin. Measurements of volume per unit area at 25 years of age did not much alter this division.

Usually firs of maritime origin, particularly from western and southern aspects, were better than those of continental origin. Different origins from a small area may give very different results, so that it is essential to look for other factors influencing tree growth, particularly inherent differences. Origins of greater height than a few hundred metres above sea level and from continental areas caused trees to grow too slowly in the Netherlands. The method of planting and the species for mixed plantations greatly influenced growth.

The more continental the climate of origin, the earlier the fir budded. The most maritime one was never injured by late spring frost. Those of continental origin suffered much from Rhabdocline pseudotsugae, while those of maritime origin were not attacked.

Online full textINTERNET
On paper FORUM ; STACKS ; NN08202,168
Keyword(s) (cab) forestry / trees / distribution / forests / netherlands / pseudotsuga menziesii
Categories Forestry (General)
Publication type PhD thesis
Language Dutch; Flemish
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