Table 3 Results of orthogonal array testing and extreme variance analysis of the transversal fertilization uniformity coefficient.

From: Optimized design and experiment of a controllable rotary tube strip fertilizer spreader for hilly mountainous terrain

Code

A

B/°

C/mm

Y1/%

1

1

35

75

63.71

2

1

50

100

25.25

3

1

65

125

49.6

4

2

35

100

40.22

5

2

50

125

36.11

6

2

65

75

51.62

7

3

35

125

34.41

8

3

50

75

24.09

9

3

65

100

12.45

\(\overline{{K_{1} }}\)

138.56

138.34

139.42

 

\(\overline{{K_{2} }}\)

127.95

85.45

77.92

 

\(\overline{{K_{3} }}\)

70.95

113.67

120.12

 

\(\overline{{k_{1} }}\)

46.19

46.11

46.47

 

\(\overline{{k_{2} }}\)

42.65

28.48

25.97

 

\(\overline{{k_{3} }}\)

23.65

37.89

40.04

 

R

22.54

17.63

20.50

 

Priority order

A > C > B

High level

A3

B2

C2

 

Preferred option

A3B2C2