Gypsum
In article ,
"herman" writes:
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| I've read that Gypsum is the best material for breaking down clay soil.
| But! Where can one buy it? Garden centres try to sell their own
| alternatives and builders supplies have never heard of it.
Well, it is doubtfully effective, but it is the principle component of
building plaster.
Regards,
Nick Maclaren.
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