Fertilisers and crop yield - C2g - Flashcards in GCSE Science

Created by: iram_f
Created on: 25-11-14 21:31

What is eutrophication?

When excess fertiliser is washed into lakes this encourages the growth of algae. The algal bloom blocks sunlight, so plants cannot photosynthesise and organisms do not receive oxygen, causing them to die. Aerobic bacteria use up the rest of the O2.

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What is NPK and why is it needed?

NPK stands for nitrogen, phosphorus and potassium, which are the essential elements needed for plant growth.

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What are some nitrogenous fertilisers?

Ammonium nitrate, ammonium phosphate, ammonium sulfate and urea are the most common nitrogenous fertilisers.

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What is titration?

Add universal indicator to an alkali so when you add acid, to neutralise it, you are able to see the pH change. Once the solution is neutral, pour it into an evaporating basin so that crystals can form; filter off the crystals & you have your liquid.

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How does the use of fertilisers increase crop yield?

Nutrients in the fertilisers can replenish essential elements that have been taken out of the soils due to previous crops, or supplement plant growth.

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Other cards in this set

Card 2

Front

What is NPK and why is it needed?

Back

NPK stands for nitrogen, phosphorus and potassium, which are the essential elements needed for plant growth.

Card 3

Front

What are some nitrogenous fertilisers?

Back

Card 4

Front

What is titration?

Back

Card 5

Front

How does the use of fertilisers increase crop yield?

Back

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Fertilisers and crop yield - C2g