I can't recall ever seeing a silage heap on a farm self combust, I know they generate a lot of heat but they are very moist. Maybe I will just leave the water in it, all seems too hard.
That's because the traditional 'pit silage' is covered with an airtight cover, to exclude oxygen. No oxygen = no combustion.
Same with the modern method of plastic-wrapped bale silaging.
And on the odour side, there are still some cockies around here who use the pit method. You can smell the silage pong from several kilometres away downwind, when a matured pit is opened...
