On 12/10/2012 19:33, The Natural Philosopher wrote:
harry wrote:


They used to clamp grain (bury it) & the trapped CO2 preserved it.
(A bit like silage)

Wrong as usual

The 'trapped CO2' does not preseverve it. Silage has already rotted. The
issue is to stop the rot whilst its still palatable to ruminants, which
means keeping the process anaerobic, which is why its sealed. Not to
keep CO2 in, but air out.

Dunno about the silage comparison, and I know you two like a good fight
- but how else does a grain storage pit work?

Andy