Source of Variation

DF

Mean Square

pH

EC

Ca¹

Mg

Na

K

OM

C

P

Biochar Doses

5

1.45**

0.45**

0.057*

11.92*

0.55**

9.80**

309.57**

104.16**

55101.73*

Linear

1

6.12**

2.10**

0.028*

14.86**

2.74**

47.61**

1499.1**

504.40**

150709.5**

Quadratic

1

0.98**

0.01^ns

0.099**

32.43**

0.006^ns

0.38**

13.8^ns

4.64^ns

120797.1**

Desvio

3

0.04*

0.05**

0.053**

4.10^ns

0.010^ns

0.33**

11.6^ns

3.91^ns

1333.9^ns

Error

18

0.009

0.008

0.006

1.37

0.01

0.02

6.94

2.33

6696.06

CV(%)

1.41

8.84

12.56

13.74

9.19

5.49

9.04

9.04

37.43

Mean

7.06

1.02

0.60

8.53

1.12

2.51

29.14

16.90

218.61