N. Demuth et A. Hiltpold, PREFERENTIAL FLOW - A REVIEW OF CURRENT K NOWLEDGE, Zeitschrift fur Pflanzenernahrung und Bodenkunde, 156(6), 1993, pp. 479-484
Despite intensive research neither suitable methods of measurement, no
r complete theoretical statements give an adequate account of preferen
tial flow due to the exceptional complexity and variability of the soi
l system. In particular it is not possible to make predictions of pref
erential flow for a given soil due to observations and measurements. I
n this work we describe theoretical and technical problems of preferen
tial flow and initiate ideas for future work in this field.