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 422967
Title The epidermal resistance to diffusion of water vapour : an improved measuring method and field results in Indian corn (Zea mays)
Author(s) Stigter, C.J.
Source Landbouwhogeschool Wageningen. Promotor(en): J. Schenk, co-promotor(en): C.T. de Wit. - Wageningen : Pudoc - ISBN 9789022005446 - 26
Department(s) Wageningen University
Publication type Dissertation, internally prepared
Publication year 1974
Keyword(s) plantkunde - gegevens verzamelen - emissie - schatting - bladeren - maïs - meting - registreren - waterdamp - Zea mays - botany - data collection - emission - estimation - leaves - maize - measurement - recording - water vapour - Zea mays
Categories Maize / Transport Phenomena
Abstract The resistance of the epidermis of the leaf to diffusion of water vapour can be measured most accurately in the field by closed diffusion porometers. It was possible to overcome the problems related to calibration and to dynamical use of a LiCl humidity sensor in the porometer. The dynamic behaviour could be represented by one calibration volume provided a special measuring scheme is applied. Presence or absence of device influence on the opening situation of the stomata is demonstrated. Measurements on corn leaves yielded permitted clamping times of 1½ to 2 minutes. All sunlit places of corn leaves, sampled throughout a dense crop on a moist soil, showed on the average a basic equality in resistance. Sampling shaded places separately this equality was also found in the average reaction of resistance to different light density levels.
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