The enzymatic activity of soils polluted with yperite and the products of its hydrolysis

The enzymatic activity of soils is shown to decrease under the impact of po llution with yperite and the products of its hydrolysis. The response of en zymatic activity to these pollutants depends on the soil type, the degree o f pollution, and the nature of particular enzymes. Invertase, dehydrogenase , and urease are the most sensitive to the considered toxicants. The enzyme s restore their activity with time, which may be due to the chemical and bi ochemical destruction of toxicants.