Source of variation

pH

EC

Se

As

Cr

p

Ash type

<0.01

<0.01

<0.01

<0.01

<0.01

Extraction time

<0.01

<0.01

0.41

0.86

0.01

Extractant type

<0.01

<0.01

0.03

0.44

<0.01

Ash type × extraction time

0.69

<0.01

0.41

0.39

<0.01

Ash type × extractant type

0.62

<0.01

0.03

0.04

0.02

Extraction time × extractant type

<0.01

<0.01

0.80

0.44

0.68

Ash type x extraction time × extractant type

<0.01

<0.01

0.80

0.22

0.99