(a)[5]
Describe how nitrogen in the fertiliser can move from the soil and end up as part of the food that humans consume.
(b)[5]
Discuss the benefits and drawbacks of using artificial nitrogen-containing fertilisers.
Biology 5090 · O Level · Mineral nutrition
Mineral nutrition — practice question
Worldwide, more than 100 million tonnes of nitrogen-containing fertiliser are made each year. Farmers then scatter this artificial fertiliser onto their soil.
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This 10-mark question has a full step-by-step worked solution and mark scheme. One marking point: “ammonium ions / urea / nitrates are added to the soil in fertiliser” …
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