## 3 Results
### Phytotoxic Indicators  
Winter wheat (_Triticum aestivum_ L.) germination after contamination with both chemical forms of silver, bismuth, tellurium, and thallium is shown in Figure 6. Silver oxide at 0.5 PPC after 10 and 90 days reduced wheat germination by 12 and 23%. On the 30 th day, no significant differences from the pure soil were found. With an increase in the concentration of silver oxide after 10 days by 1-30 PPC, a decrease in germination by 22-30% relative to the pure soil was observed. On the 30 th day, no significant differences from the pure soil were found. On the 90 th day, as well as on the 10 th day, there was a decrease in germination by 50-65% below pure soil. With nitrate of silver at 0.5 PPC on the 10 th, 30 th, and 90 th days, no significant difference from the pure soil was revealed. With an increase in nitrate of silver concentration for 10 days 1-30 PPC, the decrease in germination was 12-32% relative to the pure soil. After 30 days, a decrease in germination was established with an increase in the concentration 1-30 PPC of nitrate of silver by 20-50% relative to the pure soil. After 90 days, a decrease in germination was observed with the introduction 3-30 PPC of nitrate of silver by 19-35% relative to the pure soil. Bismuth oxide at a concentration of 0.5 PPC reduced wheat germination by 12%. After 30 and 90 days, there were no significant differences in wheat germination on soil with bismuth oxide from the pure soil. With an increase in the bismuth oxide concentration after 10 days of the experiment, the decrease in germination was 10-35% relative to the pure soil. After 30 days of the experiment, with an increase in concentrations 1-30 PPC, the decrease in germination was 33-57%. After 90 days, germination recovery was again observed compared to previous periods: a decrease in germination of 1-30 PPC was 12-27% relative to the pure soil. Nitrate of bismuth at 0.5 PPC reduced germination on the 10 th, 30 th, and 90 th days by 10, 13, and 12% of the pure soil. With an increase in the concentration of nitrate of bismuth on the 10 th day 1-30 PPC, the germination decreased by 5-22%. After 30 days, with an increase in the 1-30 PPC, the decrease in germination was 30-43%. After 90 days with an increase in the concentration 1-30 PPC, the decrease in germination was 8-46% relative to the pure soil. Thallium oxide at 0.5 PPC reduced wheat germination already on the 10 th day by 17%, on the 30 th day by 7%, and on the 90 th day by 12% relative to the pure soil. With an increase in the 1-30 PPC, 10 days after contamination with thallium oxide, a decrease in germination by 17-55% was found, after 30 days by 13-87%, and after 90 days by 19-35% relative to the pure soil. Nitrate of thallium at 0.5 PPC caused a decrease in wheat germination after 10, 30, 90 days by 12, 17, 12% relative to the pure soil. With an increase in the 1-30 PPC of nitrate of thallium after 10 days, a decrease in germination by 22-77% was found; after 30 days, 20-53% decrease was found; and after 90 days, 27-73% decrease was found relative to the pure soil. Tellurium oxide at 0.5 PPC caused decrease of wheat germination after 10 and 30 days from contamination by 20 and 13%. After 90 days of the experiment, there was no significant  
Figure 6: Germination of winter wheat (_Triticum aestivum_ L) on soil after contamination of silver, bismuth, tellurium, and thallium, % of the pure soil. difference from the pure soil. With an increase in the 1-30 PPC of tellurium oxide on the 10 th day, the decrease in germination was 27-37%, on the 30 th day it was 47-67%, and on the 90 th day it was 12-38% relative to the pure soil. Nitrate of tellurium at 0.5 PPC after 10 and 30 days of the experiment reduced wheat germination by 17 and 13% relative to the pure soil. Ninety days after the application of nitrate of tellurium, no significant differences from the pure soil were found.