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 104381
Title A physiological study of shading and density effects on the growth and the efficiency of solar energy conversion in some field crops
show extra info.
door M.S. Kamel
Author(s) Kamel, M.S.
Publisher Wageningen : Veenman
Publication year 1959
Description VI, 101 p
Notes Proefschrift Wageningen
Ook verschenen als handelsuitgave
Tutors Wassink, Prof. Dr. E.C.
Graduation date 1959-06-05
Dissertation no. 256
Author abstract show abstract
The growth and the efficiency (E s ) of conversion of solar energy were greatly affected in barley by both shading and density, although not always similarly in 1957 and 1958. Observations were made on: height; internode length; shoot diameter; shoot and leaf number; number and percentage of dead leaves; leaf length, breadth, ratio, thickness and area; spike development; awn emergence; spike length; number of heads per plant; number of grains per head and per plant; fresh and dry weights of roots, stem, leaves, heads, seeds, tops and entire plant; 1000-grain dry weight; and the root/top relation. The relation nonphotosynthetic tissues to photosynthetic tissues increased with increasing light intensity and with time. With increasing density this ratio decreased in the early stages but increased in the later ones. E s increased in the early and late stages with decreasing light intensity, in the middle stages the reverse occurred. In natural field conditions E s was maximum in the middle of the growing period. E s first (until 56-70 days) increased with density, later on medium density was more efficient. In both seasons proportion of grain and heads increased with density. Shading prolonged vegetative growth and diminished seed production.

In mangold, E s increased for each period as well as on average with density. The highest E s values also persisted over a longer period in this crop.

Online full textINTERNET
On paper FORUM ; STACKS ; 302C14
FORUM ; STACKS ; NN08202,256
Keyword(s) (cab) agriculture / plant physiology / botany / light / photoperiod / photoperiodism / shade
Categories Agriculture (General)
Publication type PhD thesis
Language English
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