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.
Forcing of Belgian endive without covering soil could improve work efficiency. Existing varieties gave loose instead of well closed heads. To improve this, a study was made of factors determining head formation, with covering soil. Roots should be exposed to a certain amount of cold, if they were to form a good head. The later the variety, the more cold was required. Roots to be forced without covering soil needed extra cold. Varieties must be bred for this purpose.The breeder could use the need for cold as a criterion in selection for earliness and to improve the uniformity of his varieties. The length of the core was negatively correlated with the need for cold. This character was also of use in testing of varieties. The result of early forcing could be improved by previously cooling the roots.Practical trials on forcing without covering soil and selection for core length confirmed the results of the research.
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