Plasticity Index

It's good for growing courgettes...
Maybe a context for the enquiry would help?
Del

I'm not sure why Del is getting the "off topic" rating on his comment... it's valid. You're asking "how good" but you don't ask in respect to the intended use. A PI of 11 means nothing without knowing whether you intend to grow plants, line a pond, lay as a road subgrade, stabilize a slope, erect a building on it... etc, etc...

It's like asking "Is water at -15 degrees good?"... it just depends on how you want to use it.

You have a G.A. from me Del...