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Transferability of Lysimeter Results to Actual Field Situations

Published online by Cambridge University Press:  12 June 2017

Roland Kubiak
Affiliation:
Inst. of Radioagronomy, KFA Jülich GmbH, PF 1913, D5170 Jülich, FRG
Fritz Führ
Affiliation:
Inst. of Radioagronomy, KFA Jülich GmbH, PF 1913, D5170 Jülich, FRG
Werner Mittelstaedt
Affiliation:
Inst. of Radioagronomy, KFA Jülich GmbH, PF 1913, D5170 Jülich, FRG
Manfred Hansper
Affiliation:
Inst. of Radioagronomy, KFA Jülich GmbH, PF 1913, D5170 Jülich, FRG
Wilhelm Steffens
Affiliation:
Inst. of Radioagronomy, KFA Jülich GmbH, PF 1913, D5170 Jülich, FRG

Abstract

Transferability of lysimeter data to the field was investigated using the leaching and degradation behavior of 14C-labeled metamitron [4-amino-3-methyl-6-phenyl-2,4-triazin-5(4H)-one] and methabenzthiazuron [1,3-dimethyl-3-(2-benzthiazolyl)-urea]. Forty-one to 53 days after application about 4% of the applied metamitron was detected in the upper 20 cm of the field soil either as active ingredient or the major metabolite desamino metamitron, whereas about 8% was found in the lysimeter soil. Forty percent and 33% of the applied methabenzthiazuron were identified in the 0- to 10-cm soil layer in the field and lysimeter 127 to 133 days after application, respectively. It is demonstrated that lysimeter experiments using 14C-labeled compounds simulate actual field conditions and give further information about the amount of total 14C-residues in the soil and percolate.

Information

Type
Soil, Air, and Water
Copyright
Copyright © 1988 by the Weed Science Society of America 

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