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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 104138
Title Effect of nitrogen dressings on growth and development of sugar-beet
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V.J.G. Houba
Author(s) Houba, V.J.G.
Publisher Wageningen : Pudoc
Publication year 1973
Description 65 p
Notes Proefschrift Wageningen  show all notes
Ook verschenen als handelsuitgave
ISBN 902200435X
Tutors Schuffelen, Prof. Dr. A.C. ; Kupers, Ir. L.J.P.
Graduation date 1973-05-09
Dissertation no. 547
Author abstract show abstract

The growth and development of sugar-beet with different nitrogen dressings was studied by measurement of leaf area and of dry weight and chemical composition (inorganic cations and anions) of several plant parts during the growth season.

For a correct interpretation of the data, the losses in dry weight, leaf area and minerals due to leaf fall could not be ignored and were therefore estimated. The losses were calculated to be 4-5 tons dry matter . ha -1and 3-4 m 2leaf area . m -2soil area depending on the amount of nitrogen dressed. The losses of N, H 2 PO 4 and K were 90-140, 5-13 and 80-105 kg . ha -1, respectively.

When the losses were included in the harvest data, other growth and uptake figures were obtained than when these losses were ignored. With no deficiency, instead of three growth stages, only two stages appeared in the distribution curve.

Furthermore a hypothesis was developed which could explain the differences in dry weight, chemical composition and leaf area of the succeeding laminae of a sugar-beet plant. It was suggested that the laminae formed first stayed small due to competition for the produced minerals within the plant. Maximum leaf area and weight was found for the 10th to l5th leaf. Later formed laminae stayed small due to the shortage of light, minerals, water and time.

Online full textINTERNET
On paper FORUM ; STACKS ; NN08200,547
FORUM ; STACKS ; NN08202,547
Keyword(s) (cab) beta vulgaris / chemical analysis / chemical composition / growth / nitrogen / plants / sugarbeet / yield increases / yield losses / yields / exposure / environmental degradation / kinetics / metabolism / ecotoxicology
Categories Fertilizers, Fertilizer Application
Publication type PhD thesis
Language English
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