Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 9039
Title Modelling for crop growth control.
Author(s) Challa, H.
Source Acta Horticulturae 248 (1989). - ISSN 0567-7572 - p. 209 - 216.
Department(s) Horticultural Supply Chains
Publication type Refereed Article in a scientific journal
Publication year 1989
Abstract In relation to the control of crop growth it is necessary to consider the aspect of time constants. Some growth characteristics, such as photosynthesis and transpiration have a rapid response to control actions, whereas other characteristics, such as development and morphogenesis show a much slower response. It is therefore important to distinguish different levels of control, according to the response time involved. For each level of control different crop growth models are to be used, with different requirements. In climate control one is primarily concerned with rapid responses of the crop. Crop growth models used for climate control therefore should be particularly strong in an accurate prediction of the instantaneous rate of photosynthesis and transpiration of the crop in relation to the environmental factors. Models that are used for prediction of crop growth over weeks or months can deal with photosynthesis in a more simple way. There are, however, much higher demands with respect to developmental processes such as formation of leaves, flowers, fruits, maturing, etc. Models used for this purpose are more crop specific than the first mentioned category and due to a lack of basic understanding of the underlying processes, have to be more descriptive.
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