Definition:
Système artificiel permettant d’évacuer loin des cultures l’excès d’eau (celle qui s’infiltre au-delà du système de racines sans être absorbée) et de sels en les dirigeant vers des puits, des drains taupes, des drains tubulaires, des drains verticaux et/ou des fossés à ciel ouvert.
Source:
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Food and Agriculture Organization of the United Nations, AQUASTAT Web Site