Influence of compost addition on the degradation rate of simazine and hexazinone

The effect of compost addition to soil on the behaviour of simazine and hex azinone was studied with two composts Obtained from sewage sludge and from urban solid waste The herbicide degradation rate, together with the herbici de sorption and the microbial biomass, were compared in the different treat ments. The study showed that the addition of both composts increased the microbial biomass and the herbicide sorption However. the effect on degradation rate s was different depending on the type of compost added.