Sensitivity

classes

Critical load range (meq∙m−2∙yr−1)

Lower range

Upper range

1

0 - 25

25 - 50

2

25 - 50

50 - 100

3

50 - 100

100 - 200

4

100 - 200

200 - 400

5

>200 (there is not a critical load)

>400 (there is not a critical load)