Humans need soil bacteria in order to help beak down some types of food. 1 type of food that requires minor amounts of soil bacteria is monkey meat although not common in the western world monkey is popular within mid-Asia countries and since monkey's eat food like berries they can get some diseases that can be minor for them but fatal for us luckily we have some trusty bacteria to eat it for us!
bacteria
Soil bacteria are the natural soil microorganisms that break down soil components into plant food.
they decomposed the materials in the soil
whenever there biodegradable materials in the soil the bacteria feed on them and turn them into useful chemicals which are good for the soil
Assimilation
Vegetation is grown with this and we need Plants for many different things.
humans need soil to grow trees to get oxygen and where would we be without oxygen and soil helps plants grow and not all plants need soil air plants do not need soil.
bacteria
No, but they do need the nutrients commonly found in the soil, and nitrogen fixing soil bacteria are extremely beneficial, though not technically necesary, to plants.
Because in soil, plants grow and we eat those plants.
soil
It increases it because when humans walk on dirt it causes the soil to fill up with dirty bacteria and cause erosion
how plentiful are bacteria in water and soil
Humans need food to survive. If the soil stops being fertile, humans move on and dig up other soil. In the process, plants and animals that lived there are now displaced.
Humans use nitrogen in the form of proteins. Bacteria found in soil convert atmospheric nitrogen into nitrates that plants use to produce proteins.
Soil bacteria are the natural soil microorganisms that break down soil components into plant food.
Tryptophan induces the lac operon.