S. No.

Parameter

Cattle dung

Rice straw

Coal

1

Ash content

25

7.2

8.1

2

Color

White

White

White

3

pH value

6.2

4

EC,%

5.1

8.3

9.2

5

OC, %

0.3

0.5

0.7

6

Cl⁻

1.4

6.8

0.5

7

2.5

4.7

1.9

8

Na

0.3

0.2

0.1

9

K

4.5

6.1

0.4

10

Mg

1.2

2.1

0.4

11

Ca

4.1

4.4

0.9