Lab. No.

Treatments

Azotobacter spp. colonies cfu∙gm⁻¹

10⁴

10⁶

10⁸

1

Control

72

50

21

2

78

47

18

3

85

35

7

4

Recommended dose 2.5 L/ha

70

33

7

5

68

35

5

6

54

31

9

7

High dose 5 L/ha

30

10

0

8

21

5

1

9

9

2

0