## 3 Results
### Interactive Effect between Growth Condition and Species on Nutritional Composition
tricolor_. The following microelements (Cu, Mn, Fe, Se, and Zn) were quantified (Table 6B). It was revealed that the OMET grown _A. cruentus_ had the highest concentration of Cu (1.04 mg/kg), Se (8.13 mg/kg), and Zn (1.66 mg/kg), whereas the _A. tricolor_ grown under OMET system was found to contain the highest concentration of Mn (2.16 mg/kg) and Fe \begin{table}
\begin{tabular}{l l c c c c} \hline \hline  & & \multicolumn{4}{c}{**3A**} \\ \hline \multirow{2}{*}{**Amaranth Species \& Treatment**} & \multicolumn{4}{c}{**Macro Elements (mg/kg DW)**} \\ \cline{3-6}  & \multicolumn{2}{c}{**Ca**} & \multicolumn{2}{c}{**Mg**} & \multicolumn{2}{c}{**K**} & \multicolumn{2}{c}{**\(p\)**} \\ \hline \multirow{2}{*}{_A. caudatus_} & OMET & 104 \(\pm\) 0.043 b & 77.3 \(\pm\) 0.032 b & 251 \(\pm\) 0.041 c & 29.7 \(\pm\) 0.045 b \\ \cline{2-6}  & non-OMET & 104 \(\pm\) 0.043 b & 62.6 \(\pm\) 0.030 d & 244 \(\pm\) 0.038 d & 21.8 \(\pm\) 0.037 c \\ \hline \multirow{2}{*}{_A. cruentus_} & OMET & 130 \(\pm\) 0.038 a & 63.3 \(\pm\) 0.029 d & 254 \(\pm\) 0.046 b & 34.7 \(\pm\) 0.043 a \\ \cline{2-6}  & non-OMET & 88.3 \(\pm\) 0.033 d & 56.6 \(\pm\) 0.025 e & 217 \(\pm\) 0.033 f & 22.2 \(\pm\) 0.039 c \\ \hline \multirow{2}{*}{_A. tricolor_} & OMET & 104 \(\pm\) 0.039 b & 82.5 \(\pm\) 0.038 a & 276 \(\pm\) 0.05 a & 30.3 \(\pm\) 0.041 b \\ \cline{2-6}  & non-OMET & 90.5 \(\pm\) 0.041 c & 66.2 \(\pm\) 0.032 c & 226 \(\pm\) 0.035 e & 21.5 \(\pm\) 0.036 c \\ \hline \multicolumn{6}{c}{3B} \\ \hline \multirow{2}{*}{_A. caudatus_} & \multicolumn{2}{c}{Cu} & \multicolumn{2}{c}{Mn} & \multicolumn{2}{c}{Fe} & \multicolumn{2}{c}{Se} & \multicolumn{2}{c}{Zn} \\ \cline{3-6}  & OMET & 0.89 \(\pm\) 0.023 c & 1.73 \(\pm\) 0.046 b & 2.62 \(\pm\) 0.05 b & 8.03 \(\pm\) 0.049 a & 1.11 \(\pm\) 0.024 c \\ \cline{2-6}  & non-OMET & 0.84 \(\pm\) 0.021 d & 1.46 \(\pm\) 0.043 d & 2.5 \(\pm\) 0.050 c & 7.01 \(\pm\) 0.048 d & 1.09 \(\pm\) 0.036 c \\ \hline \multirow{2}{*}{_A. cruentus_} & OMET & 1.04 \(\pm\) 0.034 a & 1.78 \(\pm\) 0.048 b & 2.52 \(\pm\) 0.04 c & 8.13 \(\pm\) 0.050 a & 1.66 \(\pm\) 0.048 a \\ \cline{2-6}  & non-OMET & 0.89 \(\pm\) 0.023 c & 1.17 \(\pm\) 0.041 e & 2.51 \(\pm\) 0.04 c & 7.69 \(\pm\) 0.05 b & 1.28 \(\pm\) 0.045 b \\ \hline \multirow{2}{*}{_A. tricolor_} & OMET & 0.93 \(\pm\) 0.025 b & 2.16 \(\pm\) 0.05 a & 3.41 \(\pm\) 0.39 a & 7.28 \(\pm\) 0.05 c & 1.27 \(\pm\) 0.047 b \\ \cline{2-6}  & non-OMET & 0.78 \(\pm\) 0.022 e & 1.64 \(\pm\) 0.04 c & 2.47 \(\pm\) 0.05 c & 6.36 \(\pm\) 0.048 e & 0.95 \(\pm\) 0.039 d \\ \hline \hline \end{tabular}
\end{table} 
Table 6: Effect of OMET system on the macro (A) and micro (B) elements in three Amaranth species. Figure 6: HPLC-MS-QT of untargeted metabolites profiling of _Amaranthus caudatus_, _Amaranthus cruentus_, and _Amaranthus tricolor_; Pareto scaling. (3.41 mg/kg) when compared to the rest of the species grown both under OMET and non-OMET systems. The OMET grown _A. caudatus_ contained the second highest concentration of Fe (2.62 mg/kg) and Se (8.03 mg/kg). The non-OMET grown. _A. tricolor_ measured the lowest Cu (0.78 mg/kg DW), Se (6.36 mg/kg DW), and Zn (0.95 mg/kg DW) when compared to the other Amaranth species grown under both treatments. There was no significant difference in Fe measured in all Amaranth species grown under both treatments, except for OMET grown _A. tricolor_, which had an outstanding Fe concentration (3.41 mg/kg DW). The highest Fe concentration of _A. tricolor_ (3.41 mg/kg DW) was higher than the Fe concentration reported by [PERSON] et al. [19] in _A. caudatus_ (1.06 mg/kg DW), Roselle (1.2 mg/kg DW), and Kenaf (1.17 mg/kg DW).