Mathematical description of trifluralin degradation in soil

Degradation of trifluralin in four soils, each represented at four sites, under field conditions was determined quantitatively and described mathematically. A biexponential equation that resulted from integration of first-order and second-order differential rate equations described degradation data...

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Bibliographic Details
Published inWeed science Vol. 37; no. 4
Main Authors Reyes, C.C. (Oregon State Univ., Corvallis, OR), Zimdahl, R.L
Format Journal Article
LanguageEnglish
Published 01.07.1989
Subjects
ANALISIS ESTADISTICO
ANALYSE STATISTIQUE
COLORADO
CONTAMINACION DEL SUELO
DEGRADATION
DETERIORO
HERBICIDAS
HERBICIDE
MODELE
MODELOS
POLLUTION DU SOL
RESIDU
RESIDUOS
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Summary:Degradation of trifluralin in four soils, each represented at four sites, under field conditions was determined quantitatively and described mathematically. A biexponential equation that resulted from integration of first-order and second-order differential rate equations described degradation data better than the first-order kinetic model for 15 of 25 soil-site combinations. Biexponential model regression coefficients indicated extent of degradation and that degradation is rapid at initially high trifluralin concentrations but slows as concentration decreases. The first-order kinetic model initially underestimated but ultimately overestimated degradation of trifluralin, thereby inferring that a first-order half-life is inadequate for predicting trifluralin persistence
Bibliography:T01
H01
9017578
ISSN:0043-1745
1550-2759
DOI:10.1017/S0043174500072489