K (mg/pot)

Experimental Plot

Control

Conventional

K-nf

Initial content in the soil

74.1

74.1

74.1

From different fertilizer source

0.00

15

15

Total K content in the pot (a)

74.1

89.1

89.1

Removed through plant uptake (b)

5.63

6.92

6.9

Present in soil after harvest (c)

40.17

66.3

81.9

b + c = d

45.8

73.22

88.8

Amount missing (a-d)

28.3

15.88

0.3

Percent (%) K not accounted for

38.19

17.82

0.34