Nitrogen fixation occurs through atmospheric, industrial, and biological processes. Which of these fixes the most nitrogen?
A) biological
B) atmospheric
C) industrial
D) industrial ≈ atmospheric
E) industrial ≈ biological

Question

Quizplus · Accepted Answer

Biological nitrogen fixation, which is the conversion of atmospheric nitrogen into ammonia by microbes such as bacteria and archaea, fixes the most nitrogen of the three processes mentioned. Approximately 140-180 million metric tons of nitrogen are fixed biologically each year, while atmospheric and industrial nitrogen fixation each account for less than 10 million metric tons per year.

Nitrogen Fixation Occurs Through Atmospheric, Industrial, and Biological Processes