Source

DF

Oxisol

DF

Ultisol

Entisol

Mean square

Mean square

Material (M)

1

29.962^**

1

23.11^**

11.95^**

Doses (D)

5

2.217^**

4

1.92^**

1.14^**

Interaction M x D

5

2.218^**

4

1.92^**

1.16^**

D within Biochar

Linear regression

1

20.25^**

1

14.46^**

9.031^**

Quadratic regression

1

0.83^**

1

0.89^**

0.023^ns

D within MB-4

Linear regression

1

0.27^ns

1

0.00000^ns

0.00007^ns

Quadratic regression

1

0.27^ns

1

0.00001^ns

0.00091^ns

Resídue

12

0.011

10

0.04

0.005

CV (%)

7.71

15.67

4.69

Mean

1.38

1.39

1.56