Faced with continuing soil degradation, climate vulnerability, and the now prohibitive cost of synthetic inputs, the conventional farming model is showing its limits for small farms. Whether in the intensive market gardens of the Niayes zone, the cereal and groundnut systems of the Groundnut Basin, or the mixed farms of eastern Senegal, family producers share the same challenge: maintaining yields while protecting both their soil capital and their cash position.
Agroecology is too often seen as a theoretical concept or an additional burden. Yet reorienting a technical itinerary towards sustainable practice is a genuine strategy for economic independence. By reducing dependence on bought-in inputs and drawing on local flora and local knowledge, the agroecological transition helps secure farm income.
This article is based on numerous trials conducted during advisory and training missions in the field and on our own farm, Ngoma Farm. The techniques presented here are a deliberately narrow selection from that work. Only the solutions offering the best guarantees of effectiveness, simplicity and repeatability for smallholders have been kept.
Agroforestry, mulching and soil regeneration
One of the main successes we have seen in the farms we work with lies in redefining the relationship with the soil.
Strategic shade of at least 15%: Introducing or retaining nitrogen-fixing legumes such as kadd (Faidherbia albida) or pigeon pea (Cajanus cajan) creates a protective microclimate. This moderate shade reduces heat stress and supports healthy chlorophyll development without hindering crop growth.
Mulching and living fertilisation: Composting and soil amendment are not simply a matter of heaping organic matter into a pit or a pile and waiting for it to break down. They are part of a wider practice handed to the soil through the way the plot is farmed. Continuous mulching with dry straw belongs exactly to that view. Its high carbon content means it decomposes slowly in place and feeds the soil continuously.
Experience shows this decomposition improves the structure of every soil type. Compacted soils open up, while the light sandy soils common in the Niayes gain cohesion.
The golden rule from the field fits in a sentence. The soil must never be left bare. Straw has to be renewed systematically as it breaks down, because this replenishment guarantees a permanent supply of organic matter and protects soil microbial life from direct sunlight.
Preventive bioprotection with neem and poftane
For crop protection, combining botanical extracts of poftane (Calotropis procera) and neem (Azadirachta indica) is the most accessible and economical option for producers, particularly in market gardening for sweet pepper, tomato, cabbage, and chilli.
Preparation: Fill a container to 50% of its capacity with plant material, either leaves or seeds of neem or poftane, and top up the remaining half with water.
Maturation: Leave the solution to ferment for at least a week, turning it daily. In the absence of synthetic chemical toxicity, this extraction period is essential to release the active compounds without risking damage to the crop.
Dilution for spraying: The solution should be diluted to a minimum of 1.5 to 2 litres of preparation per 10 litres of water, at 10% to 20%, depending on the severity of the attack.
Application conditions: Bioprotection is, above all, preventive. To get the most from it, treatments should be applied early in the morning or late in the evening, just before sunset. This stops heat and direct sunlight from drying the product on the leaves too quickly, which would destroy the active molecules before they can work.
Handling poftane safely
Poftane works, and it calls for precautions that are rarely mentioned. Its latex is strongly acidic and contains toxic compounds. Splashing into the eyes causes serious injury, with sudden loss of vision, photophobia, and inflammation of the cornea, all of which require medical attention. Contact with skin is also irritating.
Since the preparation means handling the plant in quantity and then stirring the mixture every day for a week, a few simple rules apply:
- Wear gloves and eye protection when harvesting, filling the container, and turning the mixture daily.
- Never rub the eyes or face while handling it, and wash hands thoroughly afterwards.
- Keep the macerating container closed and away from children and animals.
- If latex reaches the eyes, rinse immediately and generously with clean water for several minutes and seek medical help without delay.
- Wear gloves for spraying as well, and stand with your back to the wind.
These precautions do not diminish the value of the product. They are simply part of the know-how that should be passed on along with the recipe.
Biofertilisation with nguiguiss
To boost crop growth and free producers from chemical fertiliser use, nguiguiss (Piliostigma reticulatum), which is abundant in the Groundnut Basin and eastern Senegal, yields excellent results in stimulating plant vigour.
Preparation and maturation. Follow the same maceration process as for neem, with the container half-filled with nguiguiss biomass, topped up with water, and left for at least 7 days with regular turning. Where the soil is low in nitrogen, add well-rotted, nitrogen-rich manure, such as poultry droppings, at about half the volume of the nguiguiss biomass.
Dilution for watering. The concentration needed for a fertilising effect is higher than for crop protection. Mix at least 5 litres of the mother solution with 10 litres of water (50% dilution) to achieve the intended stimulating effect on growth.
Storing local seed
Traditional methods of storing farm-saved seed, meaning ash, botanical extracts and airtight containers, remain simple and free, and producers adopt them readily to secure planting material from one season to the next.
Experience across the areas we work in shows a clear technical limit: storage beyond a year. Without control of humidity and storage temperature, particularly demanding in the heat of eastern Senegal, germination rates and varietal vigour progressively decline. This is seen most often with vegetable seed, which keeps less well in storage than cereals or legumes. The future challenge for small farms, therefore, lies in improving storage conditions so that this local genetic heritage can be kept without losing its capacity to germinate.
Economic and agronomic effects observed
Adopting these locally resourced technical itineraries produces measurable benefits from the first season.
Greater financial independence: Replacing synthetic fertilisers and pesticides with local preparations sharply reduces operating costs. That fall in charges immediately improves the smallholder's cash position and net margin.
Soil resilience and water-saving: Shade, permanent carbon-rich mulch, and biological inputs together improve soil structure and its water-holding capacity, which matters greatly in the face of irregular rainfall.
More secure production: Regular preventive bioprotection keeps pest pressure below the economic damage threshold while preserving beneficial soil fauna.
Recommendations for replication
For technicians, advisers, and producers seeking to reproduce this model, several lessons should guide their approach.
Prioritise prevention and the timing of application: Biopesticides succeed on anticipation and on application during the cooler hours, morning or evening. Producers need training in the frequent monitoring of their plots.
Plan the biomass supply: To ensure consistent renewal of the mulch and a supply of useful plants, it is worth planning for harvesting areas or planting agroforestry hedges along plot boundaries.
Test before generalising: Every soil and microclimate has its particularities, from the coastal Niayes to the continental climate of eastern Senegal, so it is advisable to begin with micro-trials on small areas to adjust the concentrations.
Combine tradition with better seed storage: Local conservation methods are excellent in the short term, but simple storage equipment that improves humidity control remains essential for preserving germination capacity over the longer term.