Fig. 5From: Degradation and sorption of the herbicide pelargonic acid in subsoils below railway tracks compared to a range of topsoilsAdsorption KFoc-values of pelargonic acid-D17 versus pH of the soil suspensions. The line represents the relationship of KFoc on pH in Eq. (2), fitted to the data points for topsoils and soils from railway tracks. Bars indicate the 95% confidence intervals for KFoc and the grey shaded area is the 95% confidence interval for the fitted curveBack to article page