ZIMSEC O-Level Agriculture
5.2Soil and water
In this topic
Lessons
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Soil formation and the soil profile
30 min
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Soil texture and soil structure
35 min
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Soil types: sandy, loam and clay soils
30 min
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Soil constituents, soil water and soil organisms
35 min
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Soil temperature and how farmers modify it
25 min
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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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Soil conservation methods and structures
35 min
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Soil erosion: types, causes and consequences
30 min
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Soil drainage, waterlogging and leaching
30 min
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Water conservation and rainwater harvesting
30 min
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Water pollution and water management in Zimbabwe
30 min
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Irrigation equipment: pipes, valves, sprinklers and drip lines
30 min
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Irrigation methods and choosing a system
30 min
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Why farms irrigate and where the water comes from
25 min
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