Kenyan soils: black cotton, red loam, sandy coast

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• 8 sections of explanation, worked examples and diagrams
• 1 practice task with hints and worked answers
• A quiz that marks itself as you go
• Your progress kept across every subject you take

Other lessons in this sub-strand

1. Soil properties that make a crop
2. Soil texture: sand, silt, clay and loam
3. Soil structure: crumbs that roots can use
4. Porosity, drainage and water the crop can use
5. Soil colour: a field clue, not a full test
6. Soil pH: the chemical window for roots
7. Soil nutrients: N, P, K and the rest
8. Humus: the heart of a fertile topsoil
9. Soil organisms: the workers you rarely see
10. The soil profile and the crop layer
11. Kenyan soils: black cotton, red loam, sandy coast
12. Investigate: jar, pH, humus - then maize and sukuma