## 3 Results and Discussion
### Cadmium and Lead Pseudo-Total Levels in the Soil Samples  
The soil's total cadmium and lead levels ranged from 1.40 mg kg\({}^{-1}\) to 5.30 mg kg\({}^{-1}\) and 30.10 mg kg\({}^{-1}\) to 65.30 mg kg\({}^{-1}\), respectively (Table 3). In all samples, the limit value was not surpassed (Table 3). Given the environmental concerns of Cd and Pb, chemical characterisations and property assessments of these elements, and potentially also of their bioavailable forms, are particularly warranted, as well as an analysis of the heavy metal contents in the solution. However, 2 M HNO\({}_{3}\) highlights the low content of potential bioavailable forms of lead and cadmium in soil, below the limit parameters. Despite the high content level of the metals being observed, the proportion of acceptable forms of Cd (0.05-0.27 mg\(\cdot\)kg\({}^{-1}\)) and Pb (10.80-38.10 mg\(\cdot\)kg\({}^{-1}\)) in the soil were low, demonstrating a minimal chance of these components getting into the biomass of the plant. We agree with Sun et al. 's [PERSON] et al. (2018) claim that human behaviours, such as fuel heating, transport, and manufacturing, are the major sources of Cd and Pb contamination. The results of [PERSON] et al. (2018) showed that Pb is reasonably stable and has little chance of migration (a reduced potential migratory ability, the lowest bioavailability, and the highest stability). \begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline \multirow{2}{*}{**Profiles**} & \multirow{2}{*}{**Depth** **[m]**} & \multirow{2}{*}{**pH\({}_{\text{H2O}}\)**} & \multirow{2}{*}{**pH\({}_{\text{KCI}}\)**} & \multicolumn{2}{c}{**Cadmium**} & \multicolumn{2}{c}{**Lead**} \\  & & & & & **[mg kg\({}^{-1}\)]** & & **[mg kg\({}^{-1}\)]** \\ \cline{5-8}  & & & & & **Total** & **Bioaccessible** & **Total** & **Bioaccessible** \\  & & & & **Content** & **Form** & **Content** & **Forms** \\ \hline \multirow{3}{*}{P1} & 0.0–0.12 & 6.6 & 5.8 & 5.30 & 0.23 & 65.30 & 25.20 \\  & 0.12–0.35 & 7.1 & 6.2 & 4.90 & 0.13 & 58.90 & 23.50 \\  & \textgreater{}0.35 & 7.3 & 5.7 & 4.20 & 0.12 & 30.40 & 19.80 \\ \hline \multirow{3}{*}{P2} & 0.0–0.07 & 5.6 & 5.0 & 4.80 & 0.25 & 57.30 & 24.20 \\  & 0.07–0.36 & 5.7 & 5.1 & 2.40 & 0.19 & 51.20 & 19.60 \\  & \textgreater{}0.36 & 6.0 & 5.3 & 2.20 & 0.14 & 43.30 & 13.40 \\ \hline \multirow{3}{*}{P3} & 0.0–0.06 & 5.1 & 3.7 & 4.50 & 0.25 & 47.60 & 25.30 \\  & 0.06–0.09 & 3.9 & 3.7 & 4.90 & 0.27 & 63.10 & 38.10 \\  & \textgreater{}0.09 & 6.0 & 4.4 & 5.10 & 0.19 & 39.50 & 24.03 \\ \hline \multirow{3}{*}{P4} & 0.0–0.06 & 6.2 & 4.5 & 3.40 & 0.16 & 49.40 & 18.70 \\  & 0.06–0.20 & 6.1 & 4.2 & 2.90 & 0.13 & 47.80 & 17.30 \\  & 0.20–0.50 & 6.2 & 4.2 & 2.70 & 0.12 & 42.70 & 15.80 \\  & \textgreater{}0.50 & 6.1 & 4.1 & 2.10 & 0.08 & 41.00 & 13.10 \\ \hline \multirow{3}{*}{P5} & 0.0–0.15 & 6.4 & 4.8 & 2.40 & 0.13 & 65.10 & 17.80 \\  & 0.15–0.30 & 6.2 & 4.4 & 2.10 & 0.11 & 49.90 & 16.00 \\ \cline{1-1}  & 0.30–0.60 & 6.0 & 4.1 & 1.90 & 0.08 & 38.30 & 12.40 \\ \cline{1-1}  & \textgreater{}0.60 & 6.1 & 4.4 & 1.40 & 0.05 & 30.10 & 10.80 \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Some soil properties. In addition, the measurement of soil pH offered insightful information on the chemical properties of the soil and its potential to influence heavy metal sorption and other soil processes (Table 3). This information adds to a more thorough comprehension of the environment's shifting dynamics and possible dangers connected to soil contaminated with toxic elements [59]. The soil reaction, often measured as the pH of soil, was an important element that affects the availability and mobility of toxic metals such as cadmium and lead in the soil samples. The soil's pH level can significantly impact the solubility and bioaccessibility of HMs, thereby affecting their potential for plant uptake and environmental mobility. According to [PERSON] et al. [60], in acidic soils, the solubility of lead and cadmium increases, potentially leading to higher levels of bioaccessible lead and cadmium.