Question about the reply on the slippery beets above: isn't the botulism concern primarily for heat-canning? As I heard Sandor Katz explain once, when you "can" foods, the heat destroys all competing bacteria, but can't destroy the botulism guys, so they get unrestrained opportunity to multiply.
But as he said it, lacto-fermenting is the opposite - ALL the competing guys are given the right conditions to multiply freely, while the botulism conditions (anaerobic, IIRC, what else?) are not there.
So all those warnings for heat canning *may* not apply - still a word of caution is good, and I'd want to look more into it if it were my own slippery beets.

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