The process in which soil bacteria convert nitrogen gas into ammonia is called nitrogen fixation. In simple terms, nitrogen fixation is how certain bacteria change nitrogen from the air into a form plants can use for growth.
Imagine trying to turn a large, unmanageable amount of raw ingredients in your pantry into a delicious meal that's ready to eat. Just like how you need to convert those ingredients into something usable for dinner, soil bacteria convert nitrogen gas, which plants can't use directly, into ammonia, a form they can absorb and utilize. In this analogy, the raw ingredients are like nitrogen gas, the bacteria are the cooks transforming it, and the resulting meal is the ammonia plants need to grow.
