Hmmm just made some sauerkraut; I used the potato masher to mash it down, after mashing some potatoes. This article didn't help me not die of botulism if I do.
There's a critical difference between home fermenting and home canning.
In home fermenting, you have living lactic acid bacteria of various kinds, and they out-compete the bad bacteria. You may help them along with some salt and acid. In home canning, you kill most of the living bacteria in the sample and seal it. If you get the acidity wrong, clostridium and other spores then come to life and poison your food product. They can do this easily, because there's nothing to compete with them and because the environment is anaerobic. Safe canning requires other specific acidity and salinity, or pressure canning at a high enough temperature to kill bacterial spores.
If you follow some basic rules about salinity and only ferment raw vegetables, the practice is very safe. Half-ass canning, on the other hand, or mess with cooked foods and meats, and you're walking a dangerous line.
Most of the food is acid anyway, so it's not enough to get and acid mixture, it has to be acid enough to kill the spores. And the acidity varies with time, so I'm not sure how much acidity the initial mixture must have, IAMAFSE.
In home fermenting, you have living lactic acid bacteria of various kinds, and they out-compete the bad bacteria. You may help them along with some salt and acid. In home canning, you kill most of the living bacteria in the sample and seal it. If you get the acidity wrong, clostridium and other spores then come to life and poison your food product. They can do this easily, because there's nothing to compete with them and because the environment is anaerobic. Safe canning requires other specific acidity and salinity, or pressure canning at a high enough temperature to kill bacterial spores.
If you follow some basic rules about salinity and only ferment raw vegetables, the practice is very safe. Half-ass canning, on the other hand, or mess with cooked foods and meats, and you're walking a dangerous line.