Ecotoxicological evaluation of arsenic in soils based on wheat test

The results of the “dose-effect” correlation research are represented by measuring changes in a biota. The possibility to use the “crucial center” in the ecotoxicological standardization of the chemicals influence on the ecosystems is shown. The usage of the soil condition microbiological indicators and biological tests is supposed to be rational in the assessment of the arsenic negative impact on the ecosystem. According to the reaction of the most sensitive biological tests (active processes of nitrification, germination of garden cress, red radish with a white tip), regarding arsenic, it has been experimentally established that the concentration exceeding 5 mg As/kg is dangerous for the groundwater system.