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 561107
Title Waterafstotendheid: een veel voorkomend verschijnsel in de natuur : Voortschrijdend inzicht in het fenomeen waterafstotendheid
Author(s) Dekker, L.W.; Ritsema, C.J.; Oostindie, K.; Wesseling, J.G.
Source Stromingen : vakblad voor hydrologen 25 (2019)3. - ISSN 1382-6069 - p. 57 - 67.
Department(s) Soil Physics and Land Management
Soil, Water and Land Use
Publication type Article in professional journal
Publication year 2019
Availibility Full text available from 2020-09-01
Abstract Before 1988 soil investigators generally assumed that the dry topsoil from "nollen" (small dunes) in sandy grasslands was only a consequence of a too deep groundwater table. The bad grass performance should be due to the minor capillary rise of the groundwater towards the topsoil. An explanation for the relatively low water contents in the topsoil after several rain events or sprinkler irrigation applications could not be given at that time. However, in 1988 a second important factor for this phenomenon was determined, namely the extreme water repellency of the topsoil during dry periods. This explained that water infiltrates slowly into the dry topsoil and therefore could flow from the higher nollen to the lower environment. Although not interrogated the occurrence of water repellency, Dr. G.P. Wind showed, in the middle of the seventies of the past century, how application of the detergent Lodaline accelerated the infiltration of rainwater in the soil of his sandy garden. During the last twenty-five years, we performed several studies concerning the prevention of water repellency and the effect of the treatments with surfactants on the wetting and grass performance of sandy soils. Between 1910 and 1970, publications concerning soil water repellency appeared occasionally. After this period, the number of publications increased and resulted in around 100 publications each year during the period between 2000 and now. Although the hydrological importance of water repellency in soils attracted much interest, relatively few studies spent attention to the significance of water repellency of plants. Twenty years ago it was shown that the leaves of the Lotus flower were superhydrofobic and self-cleaning. But also, several animals have superhydrofobic properties that enable them to collect water for drinking.
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