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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 104608
Title Statistisch onderzoek naar de samenhang tussen het weer, de grasproductie en de melkaanvoer
show extra info.
door J.J. Post
Author(s) Post, J.J.
Publisher 's-Gravenhage : Staatsdrukkerij
Publication year 1949
Description 119 p.
Series title Mededelingen en verhandelingen / Koninklijk Nederlands Meteorologisch Instituut, serie A (55)
Notes Proefschrift Wageningen
Tutors Burg, Prof. Ir. B. van der
Graduation date 1949-05-24
Dissertation no. 148
Author abstract show abstract
A study was made by calculating correlation and regression coefficients, and by rising frequency diagrams of the relation between the weather factors temperature (mean daily temp. taken from observations at 8,14 and 19 hours), cloudiness and number of days with at least I mm precipitation, and the production of grass (first cut in June) and the milk supply during June-September.

Independent of soil and the differences in climatic circumstances, a reliable positive correlation was found between the grass production and the number of days with precipitation and cloudiness during the period 1 May-10 June. In this period there was a negative correlation with temperature. From data obtained from the western part of the Netherlands a reliable positive correlation was found with temperature during the winter.

The milk supply during June-September was positively correlated with number of days with precipitation and cloudiness in the months July and August. The correlation with temperature in these months was negative.

Reliable correlations were found in May in districts where grazing in the weeks before mowing caused risk. The correlations with cloudiness and precipitation were positive, while those with temperature were negative.

Otherwise the correlations in May were unimportant as was expected.

Online full textINTERNET
On paper FORUM ; STACKS ; NN08202,148
FORUM ; STACKS ; NN00557,55
Keyword(s) (cab) harvesting / milk products / dairy industry / meteorology / statistics / economic situation / fodder grasses / economic production
Categories Grasslands / Agricultural Economics (General)
Publication type PhD thesis
Language Dutch; Flemish
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