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.
In good illumination, six tomato varieties all responded to an increase in day or/and night temperature by faster stem and fruit growth, earlier but smaller fruit yield with fewer fruits in shorter and lighter clusters, and a reduction in root, stem and leaf weight. Optimum temperatures for moderate growth and high fruit yield were 20°-23° C during the day and 11°-17° C during the night. The night temperature should be at least 6°C lower than during the day.In poor illumination, plants responded to an increase in light intensity or day length by higher dry weight and leaves that were less thin and darker green; leaf dry weight increased more than leaf area. Cluster size and consequently yield was the first feature to suffer considerably by light reduction. Extra artificial light in winter before planting out gave faster growth and sturdier plants which flowered and fruited earlier than controls. The less the illumination, the more important the correct day and night temperatures. Emphasis was laid on balance between vegetative and generative growth, which was determined by the ratio of light and temperature, which in itself determined the balance between photosynthesis, and growth and respiration.
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