Nitrogen Cycle

Question 1

What is Nitrogen Fixation?

Answer 1

the process by which atmospheric nitrogen is converted to nitrogen - containing compounds that are usable by plants. Nitrogen fixation can be accomplished though the action of lightning or bacteria in the soil.

Question 2

What is ammonification?

Answer 2

the process by which bacteria and fungi convert decomposed nitrogen-containing compounds into ammonium ions.

Question 3

What is Nitrification?

Answer 3

the process by which bacteria convert ammonium ions into nitrite. Other bacteria convert to nitrite to nitrate. This is important because nitrites can reach levels that are toxic to plants.

Question 4

What is Denitrification?

Answer 4

Denitrification refers to the process by which bacteria convert nitrates back into atmospheric nitrogen.

Question 5

The Nitrogen Cycle - all steps summarized

Answer 5

When plants and animals die and decompose, they add nitrogen to the soil. Bacteria in the soil convert the nitrogen into compounds that plants can use. Plants take in these nitrogen-containing compounds through their roots and use them to grow. Animals and people eat the plants, use the nitrogen, and return it to the soil when they die and decompose.