NPK fertilisers
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12 Terms
1
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The growth of plants is dependent on what elements
Nitrogen, potassium and phosphorus
2
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What do fertilisers do
inc amount of essential nutrients present in the soil therefore inc agricultural productivity
3
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What do NPK fertilisers contain?
Salts of Nitrogen, Phosphorus and Potassium
4
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Give 4 advantages of using formulated fertilisers over manure fertilisers
better availability, can be tailored to different scenarios, odourless, not as complex to use
5
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What nitrogen compounds are in NPK fertilisers
Ammonium nitrate
6
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How is ammonium nitrate formed
Reacting ammonium and nitric acid
7
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How many sources of nitrogen is in ammonium nitrate + what does this mean
Two sources therefore ideal to use in fertilisers
8
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State a useful soluble phosphorus salt that can be used in NPK fertilisers
Calcium phosphate
9
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What useful soluble products are created by reacting phosphate rock with nitric acid?
Phosphoric acid, Calcium nitrate
10
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Give a source of insoluble phosphorus
Phosphate rock
11
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What are the 2 main soluble sources of potassium?
potassium sulfate, potassium chloride
12
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How are Potassium sulfate and potassium chloride obtained?
Mining
Note 
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