## 2 Materials and Methods  
### Pot Vegetative Experiment  
The present study was carried out in a vegetation hall belonging to the University of Warmia and Mazury in Olsztyn (Poland). The experiments were carried out in a two-factor pot experimental setup on soil taken from Eutric Cambisol topsoil [59]. Soil properties are included in Table 1. The soil had high concentrations of Fe and Mn. The concentration of trace elements in materials (sorbents) was varied and amounted to the following: compost: Cd--0.058 mg per kg, Pb--1.86 mg per kg, Cr--1.24 mg per kg, Ni--0.49 mg per kg, Zn--32.86 mg per kg, Cu--39.56 mg per kg, Mn--54.4 mg per kg, Fe--229 mg per kg, and Co--0.49 mg per kg; bentonite: Cd--0.298 mg per kg, Pb --9.78 mg per kg, Cr--2.82 mg per kg, Ni--2.44 mg per kg, Zn--14.44 mg per kg, Cu --12.92 mg per kg, Mn--147.5 mg per kg, Fe--4236 mg per kg, and Co--0.30 mg per kg; and calcium oxide: Cd--3.487 mg per kg, Pb--2.92 mg per kg, Cr--3.36 mg per kg, Ni --3.54 mg per kg, Zn--4.36 mg per kg, Cu--2.28 mg per kg, Mn--158.3 mg per kg, Fe --424 mg per kg, and Co--1.73 mg per kg. The compost was compost over a period of six months using a mixture of waste materials from a farm, including leaves from various trees (e.g., cherry, apple, maple, plum trees), cattle manure and garden peat. Analysis revealed that the compost had the highest concentrations of Zn and Cu, while the calcium oxide had the highest concentrations of Mn, Cd, Cr, Ni and Co, and the bentonite had the \begin{table}
\begin{tabular}{l c} \hline
**Properties** & **Soil** \\ \hline Granulometric composition & sandy loam \\ Sand (1.0–0.1 mm) in \% & 53 \\ Clay (0.1–0.02 mm) in \% & 8 \\ Silt (1.0–0.1 mm) in \% & 39 \\ pH\({}_{\text{KCI}}\) & 5.10 \\ Hydrolytic acidity (HAC) in mM per kg & 30.8 \\ Total exchangeable bases (TEB) in mM per kg & 88.0 \\ Cation exchange capacity (CEC) in mM per kg & 118.8 \\ Base saturation (BS) in \% & 74.1 \\ Total organic carbon (TOC) in g per kg & 8.54 \\ Available phosphorus in mg per kg & 34.35 \\ Available potassium in mg per kg & 75.26 \\ Available magnesium in mg per kg & 41.22 \\ Total cadmium & 0.194 \\ Total lead & 16.41 \\ Total chromium & 12.72 \\ Total nickel & 14.53 \\ Total zinc & 21.07 \\ Total copper & 2.95 \\ Total manganese & 220.0 \\ Total iron & 6897 \\ Total cobalt & 3.05 \\ \hline \end{tabular}
\end{table} 
Table 1: Properties of soil. highest concentrations of Pb and Fe. Furthermore, the compost sample had the lowest concentrations of Cd, Pb, Cr, Ni, Mn, Fe and Co, while the calcium oxide sample had the lowest concentrations of Zn and Cu. The first-order factor was simulated soil pollution with diesel oil, applied at the following doses: 0, 2.5, 5 and 10 cm\({}^{3}\) per kg. The second-order factor pertained to the application of organic and mineral materials, including compost, bentonite and 50% calcium oxide (CaO), to the soil at the following rates: 30 g, 20 g and 1.47 g per kg of soil, respectively. The diesel oil doses are low and may occur incidentally under real-world conditions. The levels of diesel oil and sorbent doses have been established based on previous studies [60]. Furthermore, the below quantities of nitrogen (N), phosphorus (P), potassium (K), magnesium (Mg), manganese (Mn), molybdenum (Mo) and boron (B) were added to all pots.