## 3 Results and Discussion
### Macromineral Concentrations of Yellow-Fleshed Cassava Roots by Genotype  
The means of the macromineral concentrations of yellow cassava roots (trial set 1) by genotype are shown in Table 4. For trial 1, significant differences (\(p<0.05\)) existed amongst the means of the macroelements for all the genotypes. However, genotypes 01/1224 (2033 mg/kg) and 01/1412 (1742.3 mg/kg) had the highest Ca concentrations among the samples investigated. The lowest Ca value (596.3 mg/kg) was found for TME1, the check variety. Genotypes 01/1368 (676.2 mg/kg) and 90/01554 (650.5 mg/kg) had the highest levels of Na in all the samples examined. However, the Na \begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline
**Source** & **DF** & **Ca** & **Mg** & **Na** & **K** & **P** & **S** \\ \hline \multicolumn{8}{c}{**Parameters (mg/kg)**} \\ \hline Trail Set 1 & & & & & & & \\ Genotype & 24 & 1,094,636.9 *** & 870,988 *** & 433,588.7 *** & 67,299,657.4 *** & 948,782.6 *** & 31,643.2 *** \\ Maturity & 1 & 6,634,645.5 *** & 54,562.8 & 245.4 & 1,474,560 & 47,258.17.6 *** & 1413.6 \\ Method & 4 & 652,244.4 *** & 1,260,184.4 *** & 67,252.2 *** & 144,538,100 *** & 90,862.64 *** & 10,790.2 *** \\ Genotype \(\times\) Maturity & 24 & 223,944.8 & 275,492.7 *** & 139,095.4 *** & 140,432,359.5 *** & 54,505.1 *** & 4920 *** \\ Genotype \(\times\) Method & 96 & 58,200.3 & 52,372.4 *** & 52,509.3 *** & 310,028.3 & 53,274.7 & 1280.4 * \\ Maturity \(\times\) Method & 4 & 184,934.5 *** & 8869.2 & 109,676.5 *** & 6,790,460 & 11,382.6 & 521.2 \\ Error & 96 & 45,495.2 & 33,198.6 & 33,832.3 & 2,803,823.4 & 57,485.7 & 846.7 \\ Trial Set 2 & & & & & & & \\ Genotype & 18 & 2,069,831.8 *** & 766,22.2 *** & 2390.6 *** & 6,936,386.5 *** & 418,518.3 *** & 22,729.8 *** \\ Maturity & 1 & 8,866,896 *** & 835.16 & 1233.1 *** & 30,244,860.2 *** & 39,491,892.3 *** & 86,920.9 *** \\ Method & 4 & 2059,09.1 & 432,610.7 *** & 1075.3 *** & 223,459,822.4 *** & 566,446.7 *** & 18,305.5 *** \\ Genotype \(\times\) Maturity & 18 & 540,852.5 *** & 223,119.8 *** & 508.9 *** & 41,997,484.4 *** & 230,692.9 *** & 3301.1 *** \\ Genotype \(\times\) Maturity & 72 & 117,288.9 & 47,556.3 & 395.1 *** & 9,129,322.1 & 3,288.63 & 1144.7 \\ Maturity \(\times\) Method & 4 & 108,416.7 & 8194.8 & 61.6 & 16,541,188.4 & 14,550.8 & 1102 \\ Error & 72 & 105,165.3 & 40982.7 & 230.6 & 8,178,619.1 & 27,741.9 & 1255.8 \\ \hline \multicolumn{8}{c}{**ns, not significant at \(p>0.05\), ***, significant \(p<0.05\), ***, significant at \(p<0.01\); ***, significant at \(p<0.001\).**} \\ \end{tabular}
\end{table} 
Table 2: Mean squares (MS) of macroelements of yellow-fleshed cassava root. \begin{table}
\begin{tabular}{c c c c c c c c c c} \hline \hline
**Source** & **DF** & **Fe** & **Mn** & **B** & **Cu** & **Mo** & **Co** & **Ni** & **Zn** & **Al** \\ \multicolumn{8}{c}{**Parameters (mg/kg)**} \\ \hline Trial Set 1 & & & & & & & & \\ Clone\_Name & 24 & 22.869 *** & 146.01 *** & 0.216 *** & 7.538 *** & 0.001 *** & 0.002 & 1.919 *** & 13.665 *** & 0.782 \\ Maturity & 1 & 483,888 *** & 253,001 *** & 2.859 *** & 1.309 & 0 & 0 & 7.315* & 0.334 & 0.141 \\ Method & 3 & 65,053 *** & 64,268 *** & 0.127 & 18,955 *** & 0 & 0.001 & 2.47  
concentrations were found to be the lowest in genotype 94/0330 (44 mg/kg). For K, considerably higher concentrations were recorded in genotype 01/1662 (20160 mg/kg). However, the lowest K values were recorded in genotype 94/3030 (8206.7 mg/kg). The highest concentrations for P were recorded in genotype 01/1335 (1993.7 mg/kg). However, the P concentration was considerably lower in the 01/1371 (813.3 mg/kg), 01/1412 (807.7 mg/kg), 01/1413 (847.7 mg/kg), and 01/1442 (801 mg/kg) genotypes. From the results for trial 2 in Table 5, the study showed that genotype 01/1417 (2833.3 mg/kg) had the highest Ca content of all genotypes investigated. However, genotypes 01/1181 and 01/1206 showed a significantly higher Ca content than 30,572 (check) and 91/02324 (check).