## 3 Results  
### Selected Heavy Metal Contents  
The amount of Cd (cadmium) in the microgreens ranged from 0.011 to 0.119 mg per 100 g d.m. (Figure 1). The highest statistically significant (\(p\leq 0.05\)) amount of Cd was determined in the microgreens of safflower from the second harvest, while the lowest was in those from the first harvest, compared to the other plants analysed. The microgreens of safflower from the second harvest contained 12 times more of this toxic element than the microgreens of nigella from the first harvest. The content of As (arsenic) in the analysed microgreens of uncommon oilseed plants ranged from 0.004 to 0.018 mg per 100 g dry matter (d.m.) (Figure 1). The highest statistically significant (\(p\leq 0.05\)) amount of As was determined in the microgreens of nigella from both the first and second harvests, compared to the remaining plants analysed. When compared to the microgreens of safflower from the first harvest, the As content in the microgreens of nigella from the second harvest was 4.5 times higher. The content of Pb (lead) in the examined microgreens ranged from 0.006 to 0.083 mg per 100 g d.m., and the microgreens of safflower from the first harvest contained 13 times less Pb than the microgreens of nigella from the second harvest (Figure 1). The microgreens of safflower from the first harvest contained the smallest statistically significant (\(p\leq 0.05\)) content of Cr (chromium) (0.011 mg/100 g d.m. ); the highest amount (3.5 times more) of Cr was found in the microgreens of nigella from the second harvest (0.041 mg/100 g d.m.) in comparison to the other plants tested (Figure 2). The amount of Al (aluminium) in the microgreens fluctuated between 4.62 and 17.16 mg per 100 g d.m. (Figure 2). The highest statistically significant (\(p\leq 0.05\)) amounts of Al were in the microgreens of amelina from the first harvest and the microgreens of nigella from the second harvest (11.03 mg), whereas the lowest amounts were in the microgreens of safflower (about 3.5 times less than the microgreens of amelina from the first harvest), compared to the remaining examined plants. The contents of Zn (zinc), Cu (copper) and Mn (manganese) in the microgreens of rare oilseed plants were, respectively, 9.28-16.51; 1.01-3.10 and 4.84-14.22 mg/100 g d.m., and these were statistically significantly different (\(p\leq 0.05\)) (Figures 2-4). The lowest statistically significant (\(p\leq 0.05\)) amounts of Zn, Cu and Mn were determined in the microgreens of nigella from both the first and second harvests, compared to the other microgreens (Figures 2-4). As for Cu, there was 68% less of this element in the microgreens of nigella than in the microgreens of safflower from the first harvest (Figure 3). The Zn content in the microgreens of amelina from the first harvest was about 1.78 times higher than that in the microgreens of safflower (Figure 2). In contrast, in the microgreens of safflower from the second harvest, the Mn content was about 66% higher than that in the microgreens of nigella from the second harvest (Figure 4). These differences were generally statistically significant (\(p\leq 0.05\)). The amounts of Co (cobalt), Mo (molybdenum), B (boron) and V (vanadium) were in the range, respectively, of 0.002-0.005, 0.15-1.25, 2.80-6.43 and 0.003-0.019 mg per 100 g d.m (Figures 3 and 4). As for the content of Co, its highest, statistically significant (\(p\leq 0.05\)) levels were found in the microgreens of nigella from the second harvest and in the microgreens of safflower from the second harvest, compared to the remaining microgreens examined (Figure 3). In comparison to the other analysed microgreens, amelina's microgreens from the first harvest had the highest statistically significant (\(p\leq 0.05\)) amounts Mo, while the lowest amounts were recorded in the microgreens of safflower from the first harvest (Figure 3). B, in turn, was determined in the lowest amounts in the microgreens of safflower from the first harvest (2.80 mg/100 g d.m.