C2g: Fertilisers and Crop Yield

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What are fertilisers used for?
They are chemicals that give plants essential elements need for growth.
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What do fertilisers do?
They make crops grow faster and bigger and increase the crop yield.
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How can fertilisers help with the growing population?
They can increase the food supplies.
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What is Eurotophication?
The growth and decay of aquatic plants. Algae builds up in the water due to do the fertilisers causing sunlight to be prevented from entering the water, causing the plants to stop photosynthesis, the plants start to decay and the bacteria feeds it.
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What happens in Eurotophication after the bacteria feeds on the decaying plants?
The bacteria uses up all the oygen in the water when respiring and then oxygen levels reach a point where no life is possible.
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What are the 3 main essential elements found in fertilisers?
Nitrogen, phosphorus and potassium.
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What must fertilisers be?
Soluble in water ~ they can then be taken in by the roots of plants.
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How do fertilisers increase crop yield?
They replace elements in the soil that have previously been used up, they also provide nitrogen as soluble nitrates, which are used by plants to make protein, for growth.
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How can some fertilisers be manufactured?
Neutlising an acid with an alkali.
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Other cards in this set

Card 2

Front

What do fertilisers do?

Back

They make crops grow faster and bigger and increase the crop yield.

Card 3

Front

How can fertilisers help with the growing population?

Back

Preview of the front of card 3

Card 4

Front

What is Eurotophication?

Back

Preview of the front of card 4

Card 5

Front

What happens in Eurotophication after the bacteria feeds on the decaying plants?

Back

Preview of the front of card 5
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