The bean plant dies and decomposes | Homework Helpers

An atom exists in a gas molecule in the atmosphere. It passes by the nodules of a bean plant, where it is converted into ammonia and absorbed into the soil. Bacteria in the soil then convert the ammonia into a form that can be reabsorbed by the bean plant. When the bean plant dies and decomposes, anaerobic bacteria incorporate the atom into a gas molecule, which returns to the atmosphere. Which geochemical cycle does this sequence describe?