The process of drainage of soil water is customarily treated as a fully saturated flow phenomenon. Recent work of several cooperating scientists is reported to illustrate that the partially saturated zone can significantly influence the overall performance of agricultural drains, particularly with respect to maintenance of a desirable root environment...
Published October 1978. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog