% 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