Table 4 Variance analysis of average relative flow.

From: Average relative flow of single-wing labyrinth drip irrigation tape based on projection pursuit regression

Type

Source of variance

Sum of squares

Degree of freedom

Mean square

F

P

H1

Fertilizer concentration

0.030

2

0.015

121.908

0.008

Sediment content

0.056

2

0.028

227.378

0.004

Operating pressure

0.003

2

0.002

12.377

0.075

Error

0.000

2

0.000

  

H2

Fertilizer concentration

0.007

2

0.003

25.732

0.037

Sediment content

0.054

2

0.027

204.190

0.005

Operating pressure

0.001

2

0.000

2.048

0.328

Error

0.0003

2

0.0001

  

H3

Fertilizer concentration

0.025

2

0.012

66.928

0.015

Sediment content

0.046

2

0.023

125.351

0.008

Operating pressure

0.000

2

0.000

1.152

0.465

Error

0.0004

2

0.0002

  
  1. *P < 0.05, **P < 0.01.
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