Paper 2: The Nitrogen Cycle Flashcards
1
Q
What do plants need to grow well?
A
Nitrates
2
Q
How does nitrogen move between living organisms and the environment?
A
Death and excretion
Proteins and urea
Ammonium compounds
Nitrates in soil
Nitrogen gas in the air
3
Q
Why do farmers add nitrates to crop plants in fertilisers?
A
To help plants grow better
4
Q
What is crop rotation?
A
Growing different crops each year on a rotation basis
5
Q
Why do farmers do crop rotation?
A
Improve soil fertility
6
Q
Why does crop rotation improve soil fertility?
A
Different crops remove different nutrients from the soil
Plants such as clover has nitrogen fixing bacteria in their roots can be powered back into the soil to add nitrates
