most dangerous bacteria that can be found in soil are Clostridium botulinum and E. coli

Clostridium botulinum is a Gram-positive, rod-shaped, anaerobic, spore-forming, motile bacterium with the ability to produce the neurotoxin botulinum.

its the most dangerous bacteria found in soils, it need anaerobic conditions,

also E. coli that can contaminate the soils irrigated with drainage water.

you can do test to investigate these two bacteria for safety purposes, however clostriduim is real danger in canned food specifically.

but presence of E. coli and coliform bacteria indicates contamination with drainage water

many human pathogenic bacteria can be found in soil however good hygiene practices help to ensure the safety of these food stuff

The most dangerous bacteria are the bacteria of the colon, or the so-called bacteria of poogeolone poisoning or E. coli, which remain in food in case of failure to follow the safety procedures and sanitary conditions to be present in food as well as cleaner materials and food preparation