Treatments

Soil

N-NO₃

(ppm)

Relative sufficiency

of N-NO₃

(%)

Foliar N

(%)

Relative sufficiency of foliar N

(%)

T1 = Without Acid + Sub-soiling

16.4

82.0

2.46

91.1

T2 = Without Acid + No Sub-soiling

17.6

88.0

2.45

90.7

T3 = With Acid + Sub-soiling

22.8

114.0

2.50

92.5

T4 = With Acid + No Sub-soiling

37.6

188.0

2.60

96.9

Critical Level

20

100

2.70

100