Burundi
Cotnrforts of Mumirwa
The enrgrais NPK are not generally utilisisés. Farmyard manure is to use more current
Fertilizer schedule
Sweet potato Fertilizer Schedule
Use the stage cards as a planning checklist, then read country notes for local fertilizer language (rates are not prescriptions).
13FAO fert notes
6countries
Stage checklist
Soil preparation
1–3 weeks before sowing/transplant
Work in compost or well-rotted manure; add a balanced basal dressing if soil tests low in P/K.
At planting
Sowing or transplant day
Band a light starter fertilizer near the row; avoid burning young roots with high-salt products.
Vegetative growth
2–4 weeks after establishment
Side-dress with nitrogen for leafy growth if leaves pale; water in thoroughly.
Flowering / fruiting
At flowering / early fruit set
Shift toward potassium and steady moisture for fruiting vegetables (tomato, pepper, cucurbits).
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FAO fertilization notes
Excerpts from CropWhen calendar notes that mention fertilizer, manure, NPK, or related terms.
Cameroon
Adamawa Plateau
Labor ridges manual or animal traction. Weeding the beginning of vegetation. No fertilizer application.
Cameroon
Coastal lowlands
Labor flatbed manual. Weeding the beginning of vegetation. No fertilizer application.
Cameroon
High West plateaux
Labor manual logs. Weeding the beginning of vegetation. No fertilizer application.
Ecuador
Coast or Western Region
Roots to get cuttings. Fertilization: Good results have been obtained using formula 18-46-0 at doses of 3 qq/mz (195 kg/ha) at sowing and 1.5 qq/mz (95 kg/ha) of urea at hilling (35 to 40 days)
Madagascar
Central West Zone
Culture decline on baiboho. No manure. Weeding 30j-45j AD. planting.
Madagascar
Highlands Zone South
Cultures on ridges. Additions of organic and mineral fertilizers.
Madagascar
Highlands Zone South
Rice crops with the possibility of drainage. Contributions of manure and mineral fertilizer 1 month before planting. Irrigation If dry weather during the first week. Planting
Madagascar
North West Area
Culture decline on baiboho. Additions of organic and mineral fertilizers.
Madagascar
South East Zone
Culture on drained paddy field. Additions of organic and mineral fertilizers; Weeding 30d-60d AD. planting.
Madagascar
Zone South / South West
red soils of predominantly sandy plateau. Contributions mineral fertilizer. 1-2 weeding
Malawi
Low Altitude areas
Rainfed. One cutting per station planted 30cm apart on ridges spaced at 90cm apart. White grabs are a problem, do not plant in soils rich in organic matter
Mauritius
Central Plateau (Interior inlands)
soil should be well drained and rich in organic matter. Cuttings should be taken from vigourous terminal parts of mother plants.
FAQ: fertilizing Sweet potato
When should I fertilize Sweet potato?
Follow the stage cards above (soil prep → planting → mid-season). Exact rates depend on soil tests and local packages — FAO notes below show how growers describe fertilization in different countries.
Can I copy NPK numbers from the notes?
Treat them as historical/field guidance, not a prescription for your plot. Units and products differ by country. Confirm with agricultural extension before applying.
Not a fertilizer prescription. Over-application wastes money and can harm plants and waterways. Follow local extension packages.