The Nitrogen Cycle
1. The atmosphere is 80% nitrogen: why do you think plants and animals can't use
nitrogen as it is found in the atmosphere?
2. Explain what is meant by nitrogen fixation.
3. What is the role of bacteria in the nitrogen cycle?
4.Why don't legumes need nitrogen-containing fertilizers?
5.Why is nitrogen so important for living things?
6. What are the processes involved in the nitrogen cycle?
6. What are the processes involved in the nitrogen cycle?
Answers;
1. The plants and animals can't use nitrogen because most nitrogen exists as a gas.
2.Fixation occurs when bacteria convert nitrogen gas (N2) into organic compound that living organism take up.
3.Their remains are full of nitrogen and they convert ammonia from animal excretions and dead organisms matter.
4. Because these nitrogen-fixing bacteria supply nitrogen to the plant in a form that it can use.
5. Because most living organism cannot absorb nitrogen in it's gaseous place and rely on a process called fixation to obtain nitrogen.
6. Nitrogen Fixation
Ammonification
Nitrification
Denitrification
Assimilation
