anyone have experience with making silage on a small scale? when i say small scale, i'm thinking of all the leftovers from a very large homestead kitchen garden, plus maybe some mowings from a half-acre or acre of hay (grass or legume, i don't know yet.) we would be talking beet tops, maybe forage beet roots, pea pods, overgrown lettuce, and really just any spent plant that might be ensiled while still in a green state. plus the little bit of real hay from mowing and raking the small field. the purpose of the silage would be to overwinter a small herd of possibly sheep or goats, or maybe at some point a single milch cow. i already know the material has to be kept fairly airtight to ferment properly, and was planning on using a big hole in the ground for this. also, what about using comfrey greens in silage? any thoughts?