 | Better Farming Series 16 - Roots and Tubers (FAO - INADES, 1977, 58 p.) |
 |  | (introduction...) |
| | Preface |
| | Roots and tubers |
|  | Cassava |
| | Description of the plant |
| | Different kinds of cassava |
| | Where is cassava grown? |
| | How to grow cassava |
| | The place of cassava in a crop rotation |
| | Preparing the soil for cassava |
| | How to propagate cassava |
| | How to plant cassava |
| | Looking after the plantation |
| | How to harvest and store cassava |
| | The use of cassava in food |
| | (introduction...) |
| | Fresh cassava and cassava paste |
| | Dried casava and cassava flour |
| | Cooked cassava flours |
| | Starch and tapioca |
| | Cassava leaves |
| | Yams |
| | Description of the plant |
| | There are many varieties of yam |
| | Where are yams grown? |
| | How to grow yams |
| | The place of yams in a crop rotation |
| | How to prepare the soil for yams |
| | How to propagate yams |
| | How to plant yams |
| | Looking after the plantation |
| | Harvesting and storing yams |
| | The use of yams in food |
| | (introduction...) |
| | Fresh and mashed yams |
| | Dried yams and yam flour |
| | Sweet potatoes |
| | Description of the plant |
| | (introduction...) |
| | Varieties of sweet potato |
| | Where are sweet potatoes grown? |
| | How to grow sweet potatoes |
| | (introduction...) |
| | Propagation of sweet potatoes |
| | Looking after the plantation |
| | Yields of sweet potatoes and storing |
| | Sweet potatoes in human food |
| | Tania and taro |
| | (introduction...) |
| | Description of the plant |
| | Tania or Xanthosoma |
| | Taro or cocoyam (Colocasia) |
| | Where are tania and taro grown? |
| | How to grow tania and taro |
| | (introduction...) |
| | Propagating |
| | Planting |
| | Looking after the plantation |
| | Harvesting |
| | Storing the tubers |
| | Tania and taro in human food |
| | Suggested question paper |
Where are sweet potatoes grown?
- Climate
Sweet potatoes grow well in warm, sunny and humid regions. At the same time, they withstand drought very well. For that reason, they are suited to dry savanna country.
Sweet potatoes need regular rain to grow, especially when the leaves are coming into growth. But if there is too much rain at harvesting time, the tubers rot.
- Soil
The sweet potato will grow in poor soils. The most suitable soil is a light, well- drained, sandy loam. If the soil is too rich in organic matter and nitrogen, the plant produces a great deal of useless stem and leaves, and only after a long time produces a very few tubers.
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