The effect of soil structure on the leaching of bromide and two herbicides
is investigated using soil columns repacked with four aggregate size classe
s (1-5, 5-13, 13-20 and > 20 mm) of a loamy and clay soil. The water and br
omide exportations show small differences according to the aggregate size a
nd the soil type. The transfer of the two herbicides is reduced in the fine
st aggregates of the clay soil, whereas it is only slightly influenced by t
he aggregate size in the loamy soil. (C) 2000 Academie des sciences/Edition
s scientifiques et medicales Elsevier SAS.