Standard grade chemistry topic 14 fertilisers mind map
- Created by: The wee mouse
- Created on: 22-04-13 19:06
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- topic 14 fertillisers
- elements plants need from soil
- potassium
- phosphorus
- nitrogen
- different plants need different amounts of each element
- lack of the elements results in stunted or deformed growth
- replacing soil nutrients
- crop rotation
- add fertilliser
- grow leguminous plants for a year
- cheapest for farmers
- natural fertillisers
- from the decay of dead plants or animals
- from the decay of animal waste
- synthetic fertillisers
- haber process
- ammonia from nitrogen and hydrogen
- N+H-NH
- iron catalyst
- high pressure
- increases yeild
- moderate temperature
- ammonia breaks down at higher temperatures
- iron catalyst
- moderate temperature
- increases yeild
- moderate temperature
- ammonia breaks down at higher temperatures
- unreacted gases are recycled
- ostwald process
- oxidising ammonia to make nitric acid
- nitrogen will not combine with oxgen under normal circumstances
- catalytic oxidation
- platinum catalyst
- ammonium salts
- phosphates
- nitrates
- poatssium salts
- ammonia can also be produced by mixing ammonia salts with an alkali
- haber process
- ammonia from nitrogen and hydrogen
- N+H-NH
- high pressure
- increases yeild
- increases yeild
- unreacted gases are recycled
- ammonia usually mixed with something else to make fertilliser
- haber process
- nitric acid is also produced by dissolving nitrogen dioxide in water
- ostwald process
- oxidising ammonia to make nitric acid
- nitrogen will not combine with oxgen under normal circumstances
- catalytic oxidation
- platinum catalyst
- other uses of nitric acid include dyes, medecine
- ostwald process
- haber process
- elements plants need from soil
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