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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 104385
Title The interrelation between growth and development of wheat as influenced by temperature, light and nitrogen
show extra info.
door M.S.H. Khalil
Author(s) Khalil, M.S.H.
Publisher Wageningen : Veenman
Publication year 1956
Description VIII, 75 p
Notes Proefschrift Wageningen
Ook verschenen als handelsuitgave
Tutors Wassink, Prof. Dr. E.C.
Graduation date 1956-06-01
Dissertation no. 207
Author abstract show abstract
Development was studied in wheat, mainly the subtropical varieties Hindi and Baladi. Leaf emergence was faster and the relation shoot/root decreased as temperature increased from 10° to 30°C. After transfer from low night temperature to higher temperatures for daily illumination, the root system was slower than aerial parts in reaching ambient temperature, causing damage to the plant. Warm water circulating slowly through the soil for a few minutes could avoid this. Stem elongation was most favoured at 10°-20°C in the night. Higher night temperatures gave fewer tillers and more leaves. Spikes developed sooner with 10°C than with 27°C at night and later with constant day-night temperatures.

Increase of daylength (8-24 h) increased stem length and decreased tiller number, and leaf number and area. Production of dry matter was highest with 16-20 h and was less with continuous light. Increasing intensities of extra illumination after normal daylight in the greenhouse increased stem length, decreased tillering, leaf formation and leaf area, and accelerated reproduction. Increase in normal illumination suppressed stem elongation, but increased number of tillers and leaves. White and red supplementary light for 3 weeks induced early flowering. Intense red light for 16 h accelerated spike initiation. The relation root/top increased with intensity.

Influence of N depended on light intensity. Low rate of N increased root/shoot ratio independently of light intensity. The relation C/N in the plant depended on N rate, photoperiod and night temperature. Early flowering usually accompanied a high C/N ratio. The relation of dry matter in heads to that in stems and leaves decreased with increasing N in both SD and LD. The absolute quantity of N in heads or stems, however, increased with high N and was mostly smaller in SD than LD.

Online full textINTERNET
On paper FORUM ; STACKS ; NN08202,207
Keyword(s) (cab) triticum aestivum / wheat / hexaploidy / stress / tropics / subtropics / daylight / physical factors
Categories Wheat
Publication type PhD thesis
Language English
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