Question

Plants change nitrogen from the atmosphere through a process what is that process called?

Answer 1

Nitrification

the process in which bacteria in the soil use oxygen to change compounds of nitrogen in dead plant material into nitrates which plants can then absorb as food
-Cambridge dictionary

Answer 2

This process is called nitrification. Compounds such as nitrate, nitrite, ammonia and ammonium can be taken up from soils by plants and then used in the formation of plant and animal proteins.