5.3 understand the use of fertiliser to increase crop yield
Fertilisers are used to promote the growth of plants.
Fertilisers usually consist of nitrates and phosphates
Nitrates: Forms proteins which is used to repair the plant cells
Phosphates: Are present in the membrane and DNA of plants
There are 2 kinds of fertilizers, organic and inorganic fertilisers.
The main difference is that organic fertilizers are just animal waste while inorganic ones are artificial and man made.
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