# Design and Experimental Study of Potato-Soil Separation Device for Sticky Soils Condition
## 4 Separation Device Performance Test
### Orthogonal Test
#### 4.4.2 Analysis of Orthogonal Test Results
\begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline  & \multicolumn{4}{c}{**Experimental Factor**} & \multicolumn{4}{c}{**Assessment Index**} \\ \cline{2-9}
**Experimental** & **A** & **B** & **C** & **D** & \begin{tabular}{c} **Percentage of** \\ **Small Soil** \\ **\(\lambda\)\%** \\ \end{tabular} & \begin{tabular}{c} **Percentage of** \\ **Soil Adhered to** \\ **Potato Tuber** \\ **7\%** \\ \end{tabular} & \begin{tabular}{c} **D** \\ **Tuber** \\ **K/\%** \\ \end{tabular} \\ \hline \(1\) & 18 & 70 & 0.75 & 15 & 90.46 & 0.02 & 5.1 \\ \(2\) & 18 & 122 & 0.96 & 20 & 83.79 & 0.17 & 4.2 \\ \(3\) & 18 & 175 & 1.23 & 25 & 92.92 & 0.28 & 12.18 \\ \(4\) & 23 & 70 & 0.96 & 25 & 83.67 & 0.34 & 6.67 \\ \(5\) & 23 & 122 & 1.23 & 15 & 89.61 & 0.15 & 7.40 \\ \(6\) & 23 & 175 & 0.75 & 20 & 77.44 & 0.04 & 7.35 \\ \(7\) & 28 & 70 & 1.23 & 20 & 67.86 & 0.86 & 9.1 \\ \(8\) & 28 & 122 & 0.75 & 25 & 75.44 & 0.36 & 5.88 \\ \(9\) & 28 & 175 & 0.96 & 15 & 54.08 & 0.40 & 4.82 \\ \hline \multirow{6}{*}{\(\lambda\)/\%} & \(\text{K}_{1}\) & 89.06 & 80.66 & 81.11 & 78.05 & & & \\ \cline{1-1}  & \(\text{K}_{2}\) & 85.55 & 82.95 & 73.85 & 76.36 & & & \\ \cline{1-1}  & \(\text{K}_{3}\) & 65.79 & 74.81 & 83.46 & 84.01 & & & \\ \cline{1-1}  & \(\text{K}_{4}\) & 23.26 & 8.13 & 9.62 & 7.65 & & & \\ \cline{1-1}  & \begin{tabular}{c} Optimal \\ Lever \\ Sequences \\ \end{tabular} & \begin{tabular}{c} \(\text{A}_{1}\) \\ \(\text{A}\)\(\text{C}\)\(\text{B}_{2}\) \\ \(\text{A}\)\(\text{C}\)\(\text{C}\)\(\text{B}\)\(\text{D}\) \\ \end{tabular} & \begin{tabular}{c} \(\text{B}_{2}\) \\ \(\text{C}_{3}\) \\ \end{tabular} & \begin{tabular}{c} \(\text{C}_{3}\) \\ \(\text{D}_{3}\) \\ \end{tabular} & \begin{tabular}{c} \(\text{D}_{3}\) \\ \(\text{C}_{4}\) \\ \end{tabular} \\ \hline \multirow{6}{*}{\(K\)/\%} & \(\text{K}_{1}\) & 7.16 & 6.96 & 5.77 & 5.77 & \\ \cline{1-1}  & \(\text{K}_{2}\) & 7.14 & 5.83 & 5.23 & 6.88 & \\ \cline{1-1}  & \(\text{K}_{3}\) & 6.60 & 8.12 & 9.56 & 8.24 & \\ \cline{1-1}  & \(\text{R}\) & 0.56 & 2.29 & 4.33 & 2.47 & \\ \cline{1-1}  & \begin{tabular}{c} Optimal \\ Lever \\ Sequences \\ \end{tabular} & \begin{tabular}{c} \(\text{A}_{3}\) \\ \(\text{C}\)\(\text{D}\)\(\text{B}\)\(\text{D}\)\(\text{A}\) \\ \end{tabular} & \
\begin{tabular}{c} \(\text{B}_{2}\) \\ \(\text{C}_{1}\) \\ \end{tabular} &
\begin{tabular}{c} \(\text{C}_{2}\) \\ \(\text{D}_{1}\) \\ \end{tabular} \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Results of orthogonal test and range analysis. Figure 12: Means graph of a different index at the individual level of the respective factor. (**a**) Percentage of small soil; (**b**) percentage of soil that adhered to potato tubers; (**c**) damage rate of potato tuber. \begin{table}
\begin{tabular}{c c c c c c c} \hline \hline
**Dependent Variable** & **Variance** & **Sum of** & **Degree of** & **Mean** & **\(F\) Value** & **\(P\) Value** \\  & **Source** & **Square** & **Freedom** & **Square** & & \\ \hline  & A & 887.378 & 2 & 443.689 & 9.164 & * \\  & B & 105.587 & 2 & 52.794 & 1.090 & \(\triangle\) \\ Percentage of & C & 150.807 & 2 & 75.404 & 1.557 & \(\triangle\) \\ small soil \(\lambda/\%\) & Residual & 96.838 & 2 & 48.419 & & \\  & Cor Total & 1240.610 & 8 & & & \\  & A & 0.279 & 2 & 0.140 & 5.899 & \(\odot\) \\ Percentage of soil & B & 0.060 & 2 & 0.030 & 1.275 & \(\triangle\) \\ adhered to potato & C & 0.127 & 2 & 0.063 & 2.678 & \(\triangle\) \\ tuber \(\gamma/\%\) & Residual & 0.047 & 2 & 0.024 & & \\  & Cor Total & 0.514 & 8 & & & \\  & B & 7.867 & 2 & 3.933 & 12.990 & * \\  & C & 31.426 & 2 & 15.713 & 51.892 & ** \\ Damage rate of & D & 9.183 & 2 & 4.591 & 15.163 & * \\ potato tuber \(K/\%\) & Residual & 0.606 & 2 & 0.303 & & * \\  & Cor Total & 49.081 & 8 & & & \\ \hline \hline \end{tabular} Note: The \(p\)-values are marked by ** as significant (\(p<0.05\)), * as medium significant (\(0.05<p<0.1\)), \(\odot\) as low significant (\(0.1<p<0.2\)), and \(\triangle\) as no significant (\(p>0.2\)).  
\end{table} 
Table 4: Results of variance analysis.