Nitrogen cycle (Edexcel GCSE Biology): Flashcards
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How do legumes enrich soil with nitrogen?
How do legumes enrich soil with nitrogen?
Legumes host nitrogen-fixing bacteria, converting gas to nitrates.
What is the Haber Process used for in agriculture?
What is the Haber Process used for in agriculture?
It converts nitrogen gas to ammonia for making fertilizers.
What role do nitrifying bacteria play in soil?
What role do nitrifying bacteria play in soil?
They convert ammonia into nitrates for plant absorption.
What happens during denitrification?
What happens during denitrification?
Denitrifying bacteria convert nitrates back to nitrogen gas.
Why do farmers practice crop rotation?
Why do farmers practice crop rotation?
To replenish soil nitrates and reduce disease buildup.
How does lightning contribute to nitrogen availability?
How does lightning contribute to nitrogen availability?
It converts nitrogen gas into nitrates during storms.
Why are fertilizers important for crops?
Why are fertilizers important for crops?
They provide essential nitrates to enhance plant growth.
What is the main function of decomposers in the nitrogen cycle?
What is the main function of decomposers in the nitrogen cycle?
They break down proteins, releasing ammonia into the soil.
How do artificial fertilizers impact the environment?
How do artificial fertilizers impact the environment?
Excessive use can lead to eutrophication in water bodies.
What is the significance of the nitrogen cycle?
What is the significance of the nitrogen cycle?
It recycles nitrogen to make it available for plant use.