% particles < 0.016 mm
< 10
10-20
21-40
>40
K-HCI (mg K/100 g soil)
Rating
< 5
< 8
< 11
< 14
Low
5-8
8-12
11-14
14-17
Moderate
9-12
13-17
15-21
18-25
Good
> 12
> 17
>21
>25
High