GG 11/6/2015

Which stage of the nitrogen cycle converts nitrogen gas into nitrogen-containing compounds?

Which stage of the nitrogen cycle produces ammonia from organic ammonium-containing compounds?

Which stage of the nitrogen cycle is involved in the conversion of ammonium ions to nitrate ions?

Which stage of the nitrogen cycle involve denitrifying bacteria which convert soil nitrates into gaseous nitrogen?

What are the two main types of microorganisms that carry out nitrogen fixation?

What do free-living nitrogen-fixing bacteria do?

Mutualistic nitrogen-fixing bacteria live in nodules of roots and plants e.g. peas and beans

Mutualistic nitrogen-fixing bacteria obtain fats from the plant and the plant acquires amino acids from the bacteria

Soils must be well aerated to prevent the build-up of denitrifying bacteria