3 SOIL, WATER AND PLANTS MODULE Unit 3.1 Soil Soil features Soil profile Soil tillage Soil degradation Unit 3.2 Water Water resources Water availability and quality Methods of irrigation Drainage Unit 3.3 Plants Plant classification Parts of a plant Plant processes Plant adversities and remedies Unit 3.4 Seeds and fertilisers Cropping systems Multiple cropping systems Fertilisers Seeds Seed selection 115