Cassava remains the backbone of food security and agribusiness across Nigeria. From our daily garri, fufu, and lafun to commercial starch and animal feed, the market demand never drops.
Yet, many local growers struggle when harvest season arrives. They invest in expensive bundles of improved stems, spend money on weeding, and still dig out thin, waterlogged roots that rot before reaching the market.
Cassava roots do not thrive in hard, suffocating earth. If the ground is too tight or traps water during heavy downpours, the tubers will choke, stay stunted, or simply decay underground.
In this article, Tribune Online examines the essential soil preparation steps Nigerian farmers must take to maximise cassava farming yield Nigeria and turn dry, stubborn farmland into a high-yielding goldmine.
Choose the right farmland
The journey to an abundant harvest begins with site selection. Cassava tolerates harsh environments, but it performs best in deep, well-drained sandy-loam or loamy soil.
Avoid heavy clay soils that become sticky mud during rainy months and bake into concrete blocks during dry spells. Clay holds excess standing water around developing roots, cutting off oxygen and triggering fungal root rot.
According to agricultural advisories published by the International Institute of Tropical Agriculture (IITA), selecting gently sloping or flat terrain prevents severe gully erosion while making land clearing and mechanisation much easier for the grower.
Clear and destump the plot
Once you have secured suitable farmland, you must clear the top vegetation properly. Clear bushes, shrubs, and dense grasses down to soil level without stripping away precious topsoil.
Do not burn plant debris across the entire field. Heavy burning destroys beneficial soil microbes, wipes out earthworms, and evaporates volatile nutrients like nitrogen and carbon.
Remove hard tree stumps and underground woody roots thoroughly. Stumps left behind damage tractor discs during tillage, crowd out cassava roots, and harbor fungal spores that attack tender stem cuttings.
Deep plough to break compacted layers
After clearing, break up the ground through deep ploughing. You should aim to loosen the soil to a depth of at least twenty to thirty centimeters.
Years of foot traffic, heavy rain impact, and natural settling create a hard underground crust known as a hardpan. When young cassava roots encounter this dense layer, their outward expansion halts, resulting in twisted, pencil-thin tubers.
Ploughing shatters this underground barrier, letting root tubers penetrate freely into the earth to draw moisture during dry spells while developing thick, marketable bulking.
Harrow for optimal soil texture
Ploughing leaves behind massive dirt clods that leave dangerous air pockets around newly buried cassava stems. Harrowing breaks these giant chunks down into a fine, crumbly bed.
This crumbly texture ensures that the planted stem cuttings remain firmly tucked into moist soil. Good soil-to-stem contact accelerates bud sprouting, which reduces the rate of stem rot and limits gaps in your planting density.
Harrowing also exposes latent weed seeds, dormant pests, and beetle larvae to the direct midday heat, killing them off naturally before your crop begins to establish.
Enrich farmland with organic matter
Healthy cassava yields depend heavily on balanced organic nutrients rather than an immediate rush to synthetic chemical fertilizers. Incorporating well-cured cow dung, poultry droppings, or compost directly into the soil before making ridges pays off immensely.
Organic manure enhances soil structure, retains moisture during dry spells, and delivers slow-releasing potassium, which is the primary nutrient responsible for tuber bulking.
Mix the organic matter evenly into the harrowed field so that developing roots encounter rich nutrients as soon as they shoot downward.
Make high ridges or mounds
Planting cassava flat on unprepared ground is one of the quickest ways to lose a harvest to sudden floods. Making raised beds, ridges, or large mounds elevates your crop above standing surface water.
Construct your ridges roughly thirty to forty centimeters high, spaced one meter apart from crest to crest. This height provides adequate space for tubers to expand horizontally and vertically without fighting soil resistance.
Ridging also streamlines pest management, makes weeding faster, and slashes labor costs during harvest, allowing farm hands to lift whole clusters cleanly without snapping the tubers.
Test and correct soil acidity
Cassava tolerates mildly acidic soils, but extreme acidity locks away essential plant nutrients such as phosphorus, calcium, and magnesium.
If your farmland has been exhausted by continuous monocropping or excessive chemical use, apply agricultural lime or wood ash across the field at least three weeks before ridging.
Liming sweetens the ground, balances the soil pH to the optimal range of 5.5 to 6.5, and activates soil microorganisms that break down natural fertilizer into forms your cassava roots can easily absorb.
By taking these preliminary steps seriously before planting, you set your farm up for a bountiful harvest. Healthy cassava farming starts deep below the surface, and investing in good soil preparation today guarantees heavy, rot-free tubers when harvest day arrives.