Dehydrogenase enzyme is often used as a measure of any disruption caused by pesticides, trace elements or management practices to the soil, as well as a direct measure of soil microbial activity [45, 46]. It can also indicate the type and significance of pollution in soils. It has been found that dehydrogenase enzyme is high in soils polluted with pulp and paper mill effluents [47] but low in soils polluted with fly ash [48].