𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Measurement and simulation of herbicide transport in macroporous soils

✍ Scribed by Stange, C. Florian; Diekkrüger, Bernd; Nordmeyer, Henning

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
383 KB
Volume
52
Category
Article
ISSN
1526-498X

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✦ Synopsis

Lysimeter experiments were carried out to study pesticide transport through macroporous soils. In order to di †erentiate between the e †ects of soil structure and chemical behaviour, the leaching experiments were conducted using disturbed and undisturbed soil samples. Two herbicides with di †erent sorption behaviours, and bromide as tracer were applied. The results were used to validate a dynamic simulation model which considers bypass Ñow in macropores. The simulation results show that the model is able to reproduce the soil suction within the soil as well as the spatial distribution of bromide and the herbicides. The continuity of the macropores is most important for the efficiency of bypass Ñow. The results indicate that cultivation practices like ploughing signiÐcantly inÑuence the temporal and spatial distribution of the macropores.

1998 SCI.

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