In article ,
Chris Hogg writes:
|
| Why do you say 'doubtfully effective'? I'm puzzled. Gypsum is slightly
| more soluble than hydrated lime (0.223% cf. 0.185% at 0C), and
| supplies calcium ions to flocculate the clay particles just as lime
| does. I would have thought it would be just as effective. You know
| different? Or are you suggesting lime isn't very effective either?

Yes. Changing the character of a soil needs a LOT of additive, and
I haven't heard of anyone who has much success in the long term.


Regards,
Nick Maclaren.