Table 4 Results of the orthogonal array testing and ANOVA of the transversal fertilization uniformity coefficient.

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

Source of variance

Square sum

Degree of freedom

Mean square

F-value

p-value

Model

2007.84

6

334.64

568.98

0.0018**

A

881.41

2

440.7

749.31

0.0013**

B

466.93

2

233.46

396.95

0.0025**

C

659.51

2

329.75

560.67

0.0018**

Error

1.18

2

0.59

  

Sum

2009.02

8

   
  1. **p < 0.01(highly significant); * 0.01 < p < 0.05(significant); p > 0.05(non-effect).
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