Table 4 Orthogonal test ANOVA.

From: Design and performance evaluation of a spiral bar precision weeding mechanism for corn fields

Source of variance

A

B

C

inaccuracies

(a) ANOVA for weed control rate

 Square sum (e.g. equation of squares)

338.65

10.21

592.55

18.97

 (Number of) degrees of freedom (physics)

2

2

2

2

 Mean square and

169.32

5.1

296.27

9.48

 F

17.85

0.54

31.24

 

 Significance

*

ns

**

 

(b) Analysis of variance (ANOVA) for seedling injury rate

 Square sum (e.g. equation of squares)

0.082

0.329

0.962

0.069

 (Number of) degrees of freedom (physics)

2

2

2

2

 Mean square and

0.041

0.164

0.481

0.034

 F

1.194

4.774

13.968

 

 Significance

ns

ns

*

 
  1. Note: Checking the F-distribution table shows that F0.10 (2,2) = 9.00, F0.05 (2,2) = 19.00, and F0.01 (2,2) = 99.00. Since F0.10 (2,2) < FA < F0.05 (2,2), it is considered as a significant impact and is denoted as *; FB < F0.10 (2,2), it is considered as a non-significant impact and is denoted as ns; and F0.10 (2,2) < FC < F0.05 (2,2), it is a highly significant effect, denoted as **.
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