We need some help selecting the ks in our project. We are considering the following factors:

Ks=0 for native species (no irrigation)
Ks= Low. For adaptative species. Low watering.
Ks= Average. For adaptative species. High watering.
Ks= High. For invasive species.

Is this correct?

The Reference Guide states that this factor is somehow subjective and we would like to have someone else's insight.