Cambridge IGCSE Agriculture
2.3Soil fertility
Soil fertility in Cambridge IGCSE Agriculture: what the syllabus expects you to know, the learning objectives and how to practise.
Subtopic105 practice questions5 lessons
Learning objectives
What the syllabus expects you to be able to do.
- 2.3(a)Explain the importance of nitrogen, phosphorus, potassium, calcium, magnesium and sulfur and describe the signs and effects of their deficiency.
- 2.3(b)Carry out soil sampling and soil pH tests.
- 2.3(c)Describe the nitrogen cycle and its importance to soil fertility.
- 2.3(d)Explain the importance of legumes, manure and compost in maintaining soil structure and fertility.
- 2.3(e)Describe the use of inorganic fertilisers (one mainly phosphorus, one mainly potassium and one compound fertiliser).
- 2.3(f)Explain how fertilising and liming affect soil pH.
Lessons
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Inorganic fertilisers and how to apply them
35 min
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Organic manures: kraal manure, compost and green manure
30 min
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Plant nutrients: functions, deficiency and oversupply
30 min
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Soil sampling, soil pH and liming
30 min
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The nitrogen cycle and soil fertility
25 min
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Sample question
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