Why the Haber Process Matters for Agriculture Flashcards

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What important chemical for farming is made in the Haber process?

The Haber process makes ammonia, which is used to make fertilisers.

Why do plants need nitrogen to grow well?

Plants need nitrogen to make proteins and DNA, which are needed for growth and healthy leaves.

Why can’t plants use nitrogen gas (N2) from the air directly?

Nitrogen gas is very unreactive because of a strong triple bond, so plants cannot take it in and use it.

How does the Haber process help plants get nitrogen they can use?

The Haber process turns nitrogen from the air into ammonia, which can then be made into soluble fertilisers that plants can absorb through their roots.

What is a fertiliser in agriculture?

A fertiliser is a substance added to soil to give plants essential nutrients, such as nitrogen, to help them grow better.

How is ammonia from the Haber process linked to fertilisers?

Ammonia is reacted with acids to make ammonium salts, which are key ingredients in many nitrogen fertilisers.

How do nitrogen fertilisers made from ammonia affect crop yield?

They replace nitrogen that is used up in the soil, so crops grow faster and larger, giving a higher yield of food per field.

Why is the Haber process important for feeding the world’s population?

It allows large-scale production of nitrogen fertilisers, which has greatly increased food production to help feed a growing global population.

What is one environmental problem caused by too much fertiliser use?

Nitrate from fertilisers can be washed into rivers and lakes, causing algal blooms that reduce oxygen and harm aquatic life.

Why must farmers use Haber-process fertilisers carefully?

They must add enough to support good crop growth, but not so much that it is wasted, costs money, and causes water pollution.