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Water

 

Fertility Status

1970-77

1981-90

 

N

P

K

N

P

K

Low

52

16

13

67

44

-

Medium

48

65

58

33

55

43

High

-

19

29

-

1

57


Source: Brar J.S., Chibbar I. M., (1994) N P and K status of Punjab soils, Indian journal of Ecology, Vol. 21, No. 1 pp 34-38