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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 104195
Title Estimation of standing timber
show extra info.
door F.E. Essed
Author(s) Essed, F.E.
Publisher Wageningen : Veenman
Publication year 1957
Description 60 p ill
Notes Proefschrift Wageningen  show all notes
Ook verschenen als: Mededelingen / Landbouwhogeschool Wageningen, Nederland, 57(5)
Ook verschenen als handelsuitgave
Tutors Becking, Prof. Dr. J.H. ; Kuiper, Prof. Dr. N.H.
Graduation date 1957-05-24
Dissertation no. 225
Author abstract show abstract
Some new methods were developed of estimating stem number N, regression height h -d , diameter d -V of the tree of mean volume, and the increment I . Methods for the determination of N were discussed. The theory about the distance method was explained. Essed defended to use the median m 4 of the distances measured from points chosen systematically (or at random) in the stand, to the fourth tree. The estimate with m 4 was also more efficient than estimates with the other medians (m 1 etc.) or with other parameters.

Mean volume -v in even aged stands was calculated from v with the arithmetic mean diameter, the constant introduced by Berkhout and the coefficient of variation. A formula for d -V was introduced. - The tree fork of Becking proved very useful. The expected value of 'the' diameter of a tree proved to be the same with the tree fork as with callipers.

The Cone Method was discussed for horizontal terrain and for sloping ground, as also the accessory conometer. The estimated height could be regarded as an estimate of h -d . The Cone Method allowed direct estimation of volume per ha.

A formula was derived to estimate increment with an increment borer.

Online full textINTERNET
On paper FORUM ; STACKS ; 298D32
FORUM ; STACKS ; NN08202,225
Keyword(s) (cab) forestry / forests / trees / measurement / dimensions / volume / forest stands
Categories Forestry Practices and Machinery
Publication type PhD thesis
Language English
About cum laude graduation (with distinction)
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