Course Overview

Legumes are Africa's protein backbone and soil's nitrogen managers simultaneously: a well-nodulated crop fixes 30–100+ kg N/ha per season while producing the continent's most affordable protein food. The family is wide — common bean (60–90 days bush or 90–120 days climbing), cowpea (60–90 days, drought-tolerant, leaves as urban vegetable), pigeon pea (150–240 days, multi-season, deep-rooted), chickpea and lentil (cool-season highland exports) — and every member follows the same management logic: P is the key purchased input (not N, which suppresses the free-fixing bacteria), two well-timed weedings in the first 6 weeks, scouting for pod borer at flowering (the yield-deciding pest at podding), and hermetic storage against the cowpea weevil that turns an unhermetic sack to dust in 3–6 months. The business module opens the export channel: 30–80% premium for a single clean variety at 12–13% moisture with zero defects — achievable with field discipline alone, no processing equipment — through group aggregation of 2–5 tonne lots.

What You Will Learn

Choose the right legume for your season, rainfall and market — bean, cowpea, pigeon pea, chickpea or lentil
Manage native rhizobium nodulation: pH, no excess N, P as the key fertiliser, nodule audit at 4–6 weeks
Use clean disease-free seed with fungicide treatment; stake climbing beans before the second weeding
Scout pod borer at flowering; apply threshold-based control and manage weevils in storage hermetically
Harvest at pod rattling for dry, at tenderness for fresh; dry to 12–13%, store in PICS bags or ash
Meet the export spec — one clean variety, correct moisture, zero defects — and access 30–80% price premium through group aggregation

Duration: 6 months, one module per month

Level: Beginner → Job-ready

Units: Metric with imperial where useful

Final project: Your own business plan

Month 1: The Legume Family — Protein, Nitrogen & Markets

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Lesson 1.1 — The legume family: protein, nitrogen and markets in one crop

Legumes — beans, cowpea, pigeon pea, lentils, chickpea, lima bean and their relatives — are Africa's protein backbone and soil's nitrogen managers simultaneously. A well-nodulated legume crop fixes atmospheric nitrogen worth 30–100+ kg N/ha per season (depending on species and inoculation): free fertiliser for the crops that follow. On plates, legumes are the continent's most affordable animal-protein substitute. On markets, dry grain prices are steady and rising as urban populations grow and food diversity increases. No other crop category earns income, builds soil, reduces disease in rotation, AND feeds the family for less capital than legumes.

Lesson 1.2 — Meet the family

Legume	Season	Character & market
Common bean (Phaseolus)	60–90 days (bush); 90–120 (climbing)	Africa's most widely grown; markets from household to export; highly variable in colour/type = market diversity
Cowpea	60–90 days	Drought-tolerant; leaves eaten as vegetable; grain and flour market; nodulates with native rhizobia
Pigeon pea	150–240 days (perennial types longer)	Drought-hardy; deep roots; traditional income crop; dal market; green pod and dry grain; multiple seasons from one planting
Groundnut	90–120 days	Covered in the Groundnut course; included here as rotation partner
Chickpea	90–110 days; cool season (altitude/drier climates)	High protein; dal market; altitude East Africa; growing demand
Lentil	80–110 days; cool season	Highlands; Ethiopian and North African production centres; export quality premium

Lesson 1.3 — The rhizobium advantage

Legumes fix nitrogen through root nodules housing rhizobium bacteria. Unlike soybean (Module 1.2 of the Soybean course), most common beans, cowpea, pigeon pea, chickpea and lentil work with native rhizobia already present in most African soils — no commercial inoculant required. The key is keeping the partnership working: neutral to slightly acid soils (pH 5.5–7.0), no waterlogging (drowns nodules), adequate P (energises nodulation), and no excess N (kills the partnership by making it unnecessary). Check nodules at 4–6 weeks: pink/red inside = working.

📺 Watch it done: Common bean, cowpea, pigeon pea, chickpea, lentil — choosing the right crop for your zone. Open curated video search → The written lesson above is complete on its own — the video is optional reinforcement.

Practical Assignment — Month 1: Survey your legume market: local dry bean prices (by colour/type), cowpea leaf price in the nearest town, pigeon pea dal price if known, chickpea or lentil if altitude permits. Identify which varieties are released for your area and note their colour and market type. Research whether any export buyer, processor or group certification scheme operates near you. Write your crop choice with a paragraph of reasons tied to season, rainfall and target market.

Month 1 Quiz — 10 Questions

Answer every question. Aim for at least 7/10 before marking this month complete. Each answer comes with an explanation — read them even when you are right.

1. A well-nodulated legume fixes:

Why: The nitrogen factory is the legume's gift to the rotation. A well-managed bean season can replace a significant fraction of next season's N fertiliser bill.

2. Most common beans, cowpea and pigeon pea nodulate with:

Why: The easy nodulators are the reason legumes fit naturally into African smallholder systems: no purchased bacteria needed, just managed conditions.

3. Cowpea's characteristic advantages are:

Why: Cowpea's three-way contribution: leaves are sold in urban markets, grain feeds families and markets, and roots fix nitrogen. One plant, three income streams.

4. Pigeon pea's seasonal character is:

Why: Pigeon pea's perennial advantage: replant once, harvest for 2–3 seasons on the same root system. Deep roots access subsoil water that drought kills annual crops before.

5. Legume nodulation is harmed by:

Why: The partnership is an arrangement of convenience: if the plant can get N from soil, it stops paying the bacteria. Excess N before nodulation establishment ends the arrangement.

6. The pink/red inside of a root nodule means:

Why: The colour is the proof. Pink = working bacteria; white/green = inactive or failed partnership. Dig, don't pull (stripping nodules from roots).

7. Legume markets in Africa are:

Why: The protein gap in African diets is closing through legumes: affordable, durable, diverse by colour and type — the continent's most accessible protein market.

8. Common bean's colour and type diversity means:

Why: Bean colour is a market signal: red, white, speckled and black beans each have regional preferences that determine the price. Know your market before choosing the variety.

9. Chickpea and lentils grow best:

Why: Cool-season legumes need cold nights the lowlands don't provide. Where altitude delivers the cold, chickpea and lentils earn premium dal and export prices.

10. The minimum soil pH for productive legume nodulation is:

Why: Rhizobia are pH-sensitive. Acid soils below 5.5 are the hidden yield floor: applying lime opens the soil to bacterial partnership without any other input.

Month 2: Seed, Inoculation, Spacing & the P-Not-N Rule

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Lesson 2.1 — Seed, inoculation and planting

Use clean, disease-free seed — never seed from a disease-damaged harvest. Seed-borne diseases (angular leaf spot in bean, cowpea mosaic) travel in the seed and launch infections at emergence. Seed treatment with a fungicide (thiram or equivalent) is standard in most programmes. For soybean (covered in the Soybean course), use the specialist inoculant; for common beans, cowpea, pigeon pea, chickpea and lentil, native rhizobia in most soils suffice — but on new, never-legume land, commercial inoculant for the specific species is worth trying.

Lesson 2.2 — Spacing

Legume	Row spacing	In-row spacing	Notes
Common bean (bush)	40–50 cm	10–15 cm	Dense stands suppress weeds
Common bean (climbing)	50–60 cm	15–20 cm	Needs support — staking adds 30–60% yield vs sprawl
Cowpea	60–75 cm	20–25 cm	Can sprawl; denser in short-season
Pigeon pea	60–100 cm	30–50 cm	Larger plant; often intercropped with cereals in the inter-season
Chickpea / lentil	25–40 cm	5–10 cm	Dense; often broadcast in highland systems

Lesson 2.3 — Fertility: P is the key input, N is NOT

The most common legume fertility mistake: applying nitrogen. N applied to a healthy nodulating crop suppresses the bacteria that fix N for free — you pay for N that the plant was already making. Exception: a small 'starter' N dose (10–20 kg/ha) at planting on new land or when seeds are failing to nodulate can bridge the gap before nodules establish. Phosphorus is the real key: 30–60 kg/ha P₂O₅ at planting, in the hole or furrow, doubles nodulation and yield on P-deficient soils (most of Africa). Potassium and lime (on acid soils) round out the programme.

📺 Watch it done: P in the hole, not N in the bag — the legume fertility flip that changes everything. Open curated video search → The written lesson above is complete on its own — the video is optional reinforcement.

Practical Assignment — Month 2: Source certified or carefully selected disease-free seed; treat with thiram where available. Sow at your chosen spacing (refer to Module 2 table), placing P fertiliser in the hole at planting. At 4–6 weeks, dig (don't pull) 5 plants and cut 3 nodules each — record pink/white/absent and your diagnosis. Stake climbing beans at 2 weeks; second weeding around stakes at 3 weeks. Record planting date, stand count and any node quality observations.

Month 2 Quiz — 10 Questions

Answer every question. Aim for at least 7/10 before marking this month complete. Each answer comes with an explanation — read them even when you are right.

1. Seed-borne legume diseases (angular leaf spot, mosaic) are fought with:

Why: The seed carries the disease's first deployment. Clean seed + treatment is the cheapest control; the expense of an infected crop proves it.

2. Common bean (climbing type) vs bush type:

Why: The staking investment in climbing beans returns 30–60% more yield: the bean uses vertical space that bush types waste and compete for.

3. The most common legume fertility mistake is:

Why: The irony of N on legumes: you pay for what the plant was making free. The only exception is a small starter dose on uninoculated new land.

4. Phosphorus in legume farming:

Why: P energises the nodulation process: the bacteria use P to fix N. On P-deficient soils (most of Africa), P is the single input with the highest legume yield response.

5. A starter nitrogen dose (10–20 kg/ha) on legumes is justified when:

Why: The starter N is temporary scaffolding: it supports growth while the bacteria establish. Once pink nodules appear, the factory runs on its own.

6. Cowpea spacing is:

Why: Cowpea's sprawl is a feature in intercropped systems and a challenge in monoculture: spacing reflects the use pattern.

7. Pigeon pea spacing in cereal intercrop systems:

Why: The pigeon pea's deep root and slow canopy make it the ideal inter-row cereal companion: it doesn't compete for canopy and it mines subsoil water the cereal leaves.

8. Chickpea and lentil systems use:

Why: Small highland legumes are broadcast or drilled like cereals; their dense stands are the weed control and the yield architecture simultaneously.

9. Lime on acid soils below pH 5.5 benefits legumes by:

Why: The rhizobium pH threshold is real. Lime on acid legume land is the cheapest nodule-building investment in the programme.

10. Seed on never-legume land should be:

Why: New land may lack the right rhizobium partner. Species-specific inoculant bridges the gap the soil hasn't yet filled — the soybean course's lesson applied to all legumes.

Month 3: Pod Borer, Bean Fly, Weevil & Diseases

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Lesson 3.1 — Weeds: fast and early

Legumes are slow early canopy formers — weeds in the first 4–6 weeks compete hard. Two weedings (at 2–3 weeks and 5–6 weeks) capture nearly all the benefit; after canopy close, the crop suppresses weeds itself. Climbing beans need their stakes or trellis in place before the second weeding — stakes at 2 weeks, weeding around them at 3 weeks. Hoe shallow near bean roots (the nodules are surface-close and hoeing severs them). Pre-emergent herbicides (where available) reduce labour; select legume-safe labels.

Lesson 3.2 — Pests

Pest	Damage	Response
Bean fly (Ophiomyia)	Larvae mine stems at seedling stage; notch-feeding adults on cotyledons; damping-off appearance	Seed treatment (imidacloprid where available); vigorous early stands less affected; early plant
Legume pod borer (Maruca)	Larvae damage flowers and pods — the yield-deciding pest at podding	Scout at flowering; threshold-based spray (pyrethroid or Bt-based) at first pod damage
Cowpea weevil (Callosobruchus)	Destroys grain in storage — a devastating post-harvest pest	Hermetic storage (PICS bags, airtight drums) is the primary control; ash/dust treatments as alternatives
Aphids & thrips	Sap-sucking; virus vectors; yellowing	Natural enemies usually control; treat only at threshold; viruses managed by early planting and resistant varieties
Bruchid weevil (bean)	Storage holes in dry beans	Same as cowpea weevil — hermetic storage or ash treatment

Lesson 3.3 — Diseases

Angular leaf spot (Phaeoisariopsis): the most widespread bean disease; angular grey-brown lesions; clean seed, rotation, resistant varieties.
Bean common mosaic / bean yellow mosaic virus: mosaic patterned leaves, stunting; seed-borne and aphid-spread; virus-free certified seed, resistant varieties.
Anthracnose (Colletotrichum): dark sunken lesions on pods and seeds; wet seasons; clean seed, rotation, resistant varieties.
Root rot (Pythium, Fusarium): pre- and post-emergence damping off; drainage, raised beds, seed treatment, rotation.
Cowpea mosaic virus: similar to bean mosaic; aphid-vectored; resistant varieties and aphid control.

📺 Watch it done: Maruca pod borer at flowering — scout, threshold, protect the pod. Open curated video search → The written lesson above is complete on its own — the video is optional reinforcement.

Practical Assignment — Month 3: From flowering, scout weekly: inspect 20 plants per session for pod borer (look inside fresh pod damage), bean fly at seedlings, aphid colonies, and any pod discolouration. Record on a scouting sheet. Price hermetic PICS bags and wood ash locally. Identify disease symptoms on your crop: angular leaf spot, mosaic, anthracnose — record leaf photos where possible. Decide: spray or no-spray, based on your scouting numbers vs the threshold for pod borer in your scheme's or extension's guidance.

Month 3 Quiz — 10 Questions

Answer every question. Aim for at least 7/10 before marking this month complete. Each answer comes with an explanation — read them even when you are right.

1. Legume weeding programme is:

Why: Two timely passes are the whole programme: early competition is costly; after canopy close it's free. Surface hoeing protects the nodules that are building next season's N bank.

2. Bean fly larvae at seedling stage cause:

Why: Bean fly damage is early and fast: the narrow seedling stage is the window. Vigorous seeds in warm moist soil emerge fast enough to outgrow the worst attacks.

3. The yield-deciding pest at legume podding is:

Why: The pod is the product; a borer inside a pod is money destroyed before it can be picked. Flowering is the scouting trigger — not the calendar date.

4. Cowpea and bean weevil in storage is prevented by:

Why: The storage weevil turns a good harvest into powder without intervention. PICS bags are the modern standard; ash between layers is the centuries-old alternative.

5. Angular leaf spot is managed by:

Why: Seed-borne diseases share the same management logic across all courses: clean seed is cheaper than a contaminated field. Rotation breaks the soil inoculum cycle.

6. Bean common mosaic virus is prevented by:

Why: Viral diseases are irreversible once in the plant. Prevention (seed quality, genetics, vector control) is the only strategy.

7. Root rot (damping off) in legumes is prevented by:

Why: Pythium and Fusarium live in wet, oxygen-poor soil. Raising the seedbed, draining the field and starting with treated seed removes their habitat.

8. Anthracnose on bean pods appears in:

Why: Rain splash is the anthracnose delivery system. Dense canopies in wet years amplify spread: wider spacing and resistant variety choice reduce both risk factors.

9. Climbing beans need stakes:

Why: Staking before the vine reaches for support is the window: it shapes the canopy, the airflow, and the pod position — all at once.

10. Aphid and thrips threshold decisions mean:

Why: Below-threshold sprays kill the ladybirds and parasitoids that control aphids cheaply and permanently. Threshold decisions protect the free workforce.

Month 4: Water, Intercropping & Stage Reading

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Lesson 4.1 — Water in legumes

Most African legumes are matched to rain-fed systems but have critical water windows:

Germination and emergence: moist soil essential; waterlogging fatal within 48 hours.
Flowering and pod set: drought here causes flower abortion and blank pods — the legume's silking equivalent. Even a single heavy water stress event costs 20–40% yield.
Pigeon pea's deep root system tolerates mid-season drought far better than common bean — planting mix matters for risk management.

Lesson 4.2 — Intercropping legumes with cereals

The legume-cereal intercrop is Africa's most widespread farming system for a reason: complementary canopies, fixed nitrogen, diversified income and food security in one field. Best-practice rules:

Maintain cereal density (maize, sorghum) at full; add legume rows between.
Match legume season to the cereal's canopy-close timing — beans finishing before canopy close; pigeon pea in the inter-season rows.
Don't add N fertiliser on the legume rows — it suppresses nodulation on the most productive part of the intercrop system.
Harvest legume first (usually); the stubble mulch and N-fixing roots remain for the cereal.

Lesson 4.3 — Reading the crop

Stage	Watch for	Act
Emergence (5–10 days)	Damping off, bean fly, gaps in stand	Gap-fill within 10 days; treat only if threshold reached
Vegetative (2–5 weeks)	Vigour, leaf colour (yellowing = N failure or pH problem), nodule check at 4–6 weeks	Two weedings; stake climbing types; nodule audit
Flowering (5–10 weeks)	Pod borer; aphids; flower abortion (drought)	Scout and threshold-spray if Maruca appears
Pod fill (7–13 weeks)	Pod borer continuing; pod discolouration (anthracnose); harvest readiness	Final pest check; plan harvest logistics
Maturity / harvest	Pod browning and rattling (dry); green harvest for fresh market	Harvest promptly; dry immediately; hermetic storage

📺 Watch it done: Flower-drop drought and the legume-cereal intercrop system. Open curated video search → The written lesson above is complete on its own — the video is optional reinforcement.

Practical Assignment — Month 4: Track crop stages: emergence (5–10 days), first true leaves (10–15 days), flowering (5–10 weeks), pod fill, pod browning. Record flowering date and any signs of drought-related flower drop (petals falling without pod forming). If intercropped with a cereal, count both crops' densities at thinning stage and verify cereal density was maintained. Harvest cowpea leaves (if cowpea) in the vegetative stage and record the sale price per bunch in your nearest town.

Month 4 Quiz — 10 Questions

Answer every question. Aim for at least 7/10 before marking this month complete. Each answer comes with an explanation — read them even when you are right.

1. Legume drought at flowering and pod set costs:

Why: The legume sheds flowers under stress faster than any other crop response: a week without water at the wrong time erases what the whole season built.

2. Waterlogging at legume germination is:

Why: The two enemies of legume emergence are dry soil (won't germinate) and wet soil (drowns after germination). The narrow window between them is the planting sweet spot.

3. Pigeon pea's mid-season drought tolerance comes from:

Why: Root depth is drought insurance: pigeon pea's tap root accesses subsoil moisture that dries 30 cm down — the reason it fits semi-arid systems where common bean fails.

4. In cereal-legume intercrops, N fertiliser on legume rows:

Why: The intercrop logic: cereal rows get N; legume rows get P and lime. Applying N on legume rows is paying for nitrogen that the bacteria would have made free.

5. The legume-cereal intercrop works because:

Why: Total land productivity from a well-designed legume-cereal intercrop routinely exceeds monoculture of either: temporal niche, root depth, N economy.

6. The nodule audit at 4–6 weeks checks:

Why: The audit is the partnership's health check. White nodules at 6 weeks mean the N factory never started — lime, or soil pH is the diagnosis.

7. Legume harvesting at pod browning and rattling means:

Why: Shattering is the legume harvest's enemy: dry pods pop open and scatter seed. Harvest just before peak browning and dry quickly to finish.

8. Fresh-market cowpea leaves are harvested:

Why: The leaf harvest is extra income: young cowpea leaves sell at vegetable-market prices. Managed carefully (don't strip too many), it doesn't harm the grain crop.

9. Climbing bean stakes are best made from:

Why: Any straight local material serves: a 1.5–2 m stake per plant or frame system converts a sprawling plant into a productive vertical canopy.

10. After legume harvest, the stubble and root system left in the field:

Why: The roots and stubble are the fertiliser delivery system. Incorporating rather than burning returns N, organic matter and root channels to the next crop's rooting zone.

Month 5: Harvest Timing, Hermetic Storage & Seed Stock

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Lesson 5.1 — Harvest timing

Dry beans and pulses: harvest when pods are brown and dry (rattling stage), before shattering opens pods. Morning harvest when dew slightly softens pods reduces losses. Cut whole plants or pick pods individually; stook (stand in small heaps) to complete any remaining drying. Fresh market (green beans, green cowpea): harvest at the right tenderness stage — stringy or starchy overripe beans lose their market premium. Check daily during the fresh window.

Lesson 5.2 — Threshing and cleaning

Beat dry plants on tarpaulins or mats; tread by foot; small motorised threshers where available.
Winnow to remove chaff; sieve to remove broken seed and stones.
Dry to 12–13% (bite test: hard crack, no dent) before storage — the grain moisture law for pulses.

Lesson 5.3 — Storage: hermetic against the weevil

Cowpea weevil (Callosobruchus maculatus) is the most devastating storage pest in Africa — it lays eggs on grain, larvae hatch and eat through seed, and a single infested sack turns to dust in 3–6 months. Hermetic storage (PICS bags, metal drums, airtight containers) is the only reliable control: zero oxygen kills eggs and larvae without chemicals. Where hermetic is not available: clean sand or wood ash mixed into the grain (1 part ash to 5 parts grain) physically blocks the weevil's breathing system — traditional technology proven effective.

Lesson 5.4 — Seed stock

Common bean and cowpea seed viability: 12–18 months in open storage, 2–3 years hermetically sealed. Select seed from disease-free, vigorous, correctly-typed plants; dry to 12%; seal hermetically with variety label and date. Run a germination test (50 seeds, damp cloth, 5 days) before sowing season — the test prevents the heartbreak of a failed stand on a planted sack of dead seed.

📺 Watch it done: PICS bags vs cowpea weevil — why the $3 hermetic bag is not optional. Open curated video search → The written lesson above is complete on its own — the video is optional reinforcement.

Practical Assignment — Month 5: Harvest at pod-rattling stage in the morning; stook plants to complete drying. Thresh on a tarpaulin, winnow, sieve, and dry to bite-test standard (hard crack). Fill a PICS bag (or use clean sealed tin/drum) for at least a 10 kg sample; fill a standard open sack with the same batch. Check both after 3 weeks and record any weevil activity differences. For seed stock: select 5 plants for best characteristics, dry to 12%, seal with label. Run a germination test on saved seed from last season if available.

Month 5 Quiz — 10 Questions

Answer every question. Aim for at least 7/10 before marking this month complete. Each answer comes with an explanation — read them even when you are right.

1. Dry bean harvest timing is:

Why: The rattling test is the farmer's maturity meter: seeds loose inside the pod with a rattle sound = ready. Morning timing gets those pods before afternoon heat pops them open.

2. Fresh-market green bean harvest is:

Why: The fresh market pays for tenderness; overripe beans pay nothing or go to the dry market at a fraction. Daily checking during the window is premium capture.

3. Pulse storage moisture target is:

Why: The standard moisture-law range applies to pulses as to cereals. Twelve percent is safe for months; above this, storage weevil, mould and quality deterioration accelerate.

4. Cowpea weevil (Callosobruchus) turns infested grain to:

Why: An uncontrolled cowpea weevil infestation literally eats the food. Hermetic storage is the modern solution; ash is the traditional one. Neither option is optional.

5. PICS bags control cowpea weevil by:

Why: Airtight = insect-dead. No oxygen, no respiration, no survivors — the principle that makes hermetic storage the universal grain-safe solution.

6. Traditional wood ash in stored grain works by:

Why: The ash is a physical barrier: fine particles coat the grain and clog the spiracles (breathing pores) of beetle larvae. No toxicity, no residue — centuries of proven use.

7. Common bean seed viability is:

Why: Seed is perishable: viability declines with time, heat and moisture. The germination test before the season is the insurance policy that costs 50 seeds and 5 days.

8. Selecting seed for the next season means:

Why: Self-selected legume seed is improvement: every season's best plants, chosen consistently, create a locally-adapted line better than any generic variety sold without care.

9. Morning harvest of dry beans:

Why: The microclimate trick: 6 AM pods are pliable; noon pods are powder-keg tight. One hour's temperature difference saves meaningful yield.

10. Winnowing after threshing removes:

Why: A two-step clean: winnow removes light material, sieve removes stones. The clean lot fetches premium from any buyer; the uncleaned lot is discounted at every point.

Month 6: Markets, Export Premium & the Group Path

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Lesson 6.1 — Markets for legumes

Channel	Buyer	What they want
Household food	Own family	Colour/type matching family preference; never sell before food security
Local market (dry grain)	Village and town traders	Clean, dry, correct colour; immediate cash
Export buyers (beans, lentils, chickpea)	Regional/international traders	Tight grain type, size, colour, moisture, zero defects; premium 30–80% above local
Fresh vegetable (cowpea leaves, green beans)	Urban market, restaurants	Young leaves, correct pod size; premium per kg, daily market
Processed products	Flour mills, canning, dal processors	Volume + quality specs; opportunity for groups
Lean-season hold	All dry grain buyers at 20–50% higher prices	Hermetic storage is the enabler; same as maize hold strategy

Lesson 6.2 — An honest one-hectare bean budget

Item	Assumption	Amount
Yield (climbing bean, staked)	Staked, two weedings, P fertiliser, pod-borer scouted	~1.8–2.5 t/ha
Gross (local dry price)	$0.70–1.20/kg	~$1,260–3,000
Gross (export specs met)	$1.20–1.80/kg	~$2,160–4,500
Seed (60–80 kg) + treatment		$40–100
P fertiliser (30–40 kg P₂O₅)	SSP or compound at planting	$30–80
Stakes (climbing type)	~4,000–5,000 stakes/ha	$80–200
Weeding labour ×2 + staking		$80–180
Harvest + threshing + cleaning		$80–160
Hermetic storage (PICS bags)		$15–40
Indicative margin	Local price; export premium nearly doubles	~$850–2,000/ha local; up to $3,500+ export

Lesson 6.3 — The export premium: meeting the spec

Export buyers pay 30–80% more than local traders for beans, lentils and chickpea that meet grain-type, size, colour, moisture and defect specs. The spec checklist: correct variety (one colour, one type, no mixing), clean (zero stones, broken seed or foreign matter), 12–13% moisture, and consistent lot size. Meeting the spec is a farm discipline, not a processing one: variety selection, clean harvest, drying and hermetic storage deliver the export lot without any equipment beyond what the household already uses. Group certification and aggregation is the vehicle for access — individual sacks of 200 kg cannot enter the export channel; group lots of 2–5 tonnes can.

Lesson 6.4 — Records and the growth path

Per plot per season: variety and seed source; planting date; stand count; nodule audit at 4–6 weeks; weeding dates; scout records (pod borer at flowering, count and spray/no-spray decision); harvest date and yield; threshing and drying days; storage type and duration; sale date, channel and price. Report card: yield (kg/ha), moisture at storage, and sale price vs local trader price (the channel premium). Growth path: year one — one clean-variety staked bean plot done to export spec; year two — group aggregation and first export-quality lot sold; year three — consistent supply of a premium variety for export or processing contract.

📺 Watch it done: The export spec — one colour, 12% moisture, zero defects — and the group lot that unlocks it. Open curated video search → The written lesson above is complete on its own — the video is optional reinforcement.

Practical Assignment — Month 6: Build the one-hectare budget from your recorded costs and local prices. Compare: local trader price, lean-season price (call 3 months later), and export price (if a buyer exists). Identify the export spec for your bean type from any available buyer, extension or NGO programme. Calculate the premium percentage. Identify 5 other farmers who grow the same bean variety (critical for colour consistency). Draft a proposal for a simple group lot: how many tonnes, from how many farmers, stored where, sold to whom. This is your year-two plan.

Month 6 Quiz — 10 Questions

Answer every question. Aim for at least 7/10 before marking this month complete. Each answer comes with an explanation — read them even when you are right.

1. Export bean buyers pay compared to local traders:

Why: The premium is the quality premium, and it is available without any equipment: correct variety, clean harvest, 12–13% moisture, hermetic storage. Discipline, not machinery.

2. Meeting export legume specs requires:

Why: The export spec is a harvest and storage standard. Every step is field and store discipline: single variety, clean picking, drying, hermetic hold.

3. Group aggregation for export access is needed because:

Why: Export buyers are volume operators. The group is the unit of commerce; the individual farmer is an input into that unit. The logic runs through sorghum, soybean and now legumes.

4. The lean-season price premium for pulses is:

Why: Dry grains and pulses follow the same harvest-glut / lean-season differential as maize. The same storage discipline captures the same premium.

5. Processed legume products (dal, flour, canned) require:

Why: Processing buyers, like export buyers, need reliability. A group that delivers 5 t of clean dry cowpea monthly wins the contract that an individual 100 kg lot cannot enter.

6. The three report-card numbers for beans are:

Why: Yield reveals the agronomy; moisture reveals the drying discipline; price-ratio reveals the channel discipline. All three must score for the enterprise to be productive.

7. The cowpea leaf market is:

Why: Young cowpea leaves are a staple urban vegetable in many African cities. Daily picking during the vegetative stage adds income without significantly reducing grain yield.

8. Chickpea and lentil export quality is:

Why: The dal trade is global; East African chickpea and lentil already enter it. The premium over common bean can be 2–3×. Altitude and cool climate are the agronomic prerequisites.

9. Staked climbing bean vs bush bean economics:

Why: The stake is capital that earns: installed once, the yield gain recurs across the whole season. Where local bamboo or wood is free, the staking decision is a free 30–60% yield increase.

10. The year-one focus for legumes is:

Why: Quality before area: one clean, well-managed plot to export spec teaches the discipline that scales. Ten mixed-variety poorly-stored plots teach only how to sell at bottom price.

🏆 Final Project: Your Beans & Legumes Business Plan

The final project is your complete legume enterprise plan — crop choice, the P-not-N fertility logic, pod-borer scouting, hermetic storage, and the export-premium pathway through group aggregation.

Crop and market case: chosen legume, variety (colour and type for target market), season fit, and market channel identified (local, lean-season, fresh leaf, export, processing).
Establishment plan: seed source and treatment, spacing, P fertiliser (product, rate, placement), thinning/gap-fill plan, staking schedule for climbing types, rhizobium strategy for new land.
Nodule audit plan: dig date (4–6 weeks), sampling procedure, pink/white assessment, action if white (lime diagnosis, pH test, inoculant option).
Pest and disease protocol: pod-borer scouting routine (weekly from flowering), threshold (per extension guidance), approved product, bean fly and aphid watch, hermetic storage as weevil control.
Harvest and storage chain: pod-rattling trigger, morning harvest, threshing and drying to 12–13%, hermetic storage (PICS or ash alternative), seed stock selection and hermetic sealing.
Export spec compliance: single variety (no colour mixing), clean (stones/broken seed removed), 12–13% moisture, lot size for group aggregation — list the five steps as commitments.
Budget and group plan: hectare budget with three price scenarios, group-formation proposal (variety consistency partners, storage point, buyer contact), year-one/two/three path.

Submission standard: A plan you could hand to a savings group, a bank officer, or a family investor without embarrassment. Real local prices, real named buyers, honest risks.

💰 Startup Budget — 1 Hectare Climbing Bean (Staked, Export-Spec Path)

The climbing bean budget's key variables are the stake cost (once only if bamboo or free wood, recurring if bought) and the price channel: local market vs export-spec premium is a 30–80% difference on the same grain. The hermetic bag is the cheapest investment in the whole chain.

Item	Details	Typical cost (USD)
Seed (60–80 kg) + fungicide treatment	Disease-free, one colour variety	$40–100
P fertiliser (SSP or compound at planting)	30–40 kg P₂O₅	$30–80
Lime (where pH below 5.5)	To restore nodulation	$20–60
Stakes (4,000–5,000 per ha, bamboo or wood)	Installed at 2 weeks	$80–200
Weeding labour ×2 + staking labour	2–3 weeks and 5–6 weeks	$80–180
Pod-borer spray (only if threshold crossed)	Approved pyrethroid or Bt product	$0–60
Harvest, threshing, winnowing, sieving labour		$80–160
Drying + hermetic storage (PICS bags)	PICS bags × 5–8 per tonne	$15–40
Transport to market or group collection point		$30–80
Contingency (10%)		$40–100
Total indicative costs		$415–1,060
Local market margin	1.8–2.5 t × $0.70–1.20	~$850–2,000/ha
Export-spec margin	Same grain at $1.20–1.80/kg	~$2,160–3,500+/ha

Prices vary widely by country. Before spending anything, price every line in your own town and rebuild this table — that exercise is part of your final project.

📚 Glossary

Nodule: Root structure housing nitrogen-fixing rhizobium bacteria; pink/red inside = active.
Native rhizobium: Bacteria already in most African soils that nodulate common bean, cowpea, pigeon pea, chickpea and lentil — unlike soybean's specialist.
Pod borer (Maruca): The legume family's yield-deciding pest at flowering and podding — scouted and spray-managed at threshold.
Cowpea weevil (Callosobruchus): Post-harvest beetle that destroys dry grain in 3–6 months; controlled by hermetic storage or ash.
PICS bag: Three-layer hermetic grain bag; eliminates oxygen; kills storage insects without chemicals.
Angular leaf spot: Most widespread bean leaf disease; angular grey-brown lesions; seed-borne; managed by clean seed, rotation, resistance.
Anthracnose: Dark sunken lesions on pods and seed in wet seasons; seed-borne; same management as angular leaf spot.
Bean fly (Ophiomyia): Stem-mining larval pest at seedling stage; seed treatment and vigorous early stands are defences.
Climbing bean: Indeterminate vining bean requiring staking; yields 30–60% more than bush types when staked.
Bush bean: Determinate compact bean; no staking needed; lower yield ceiling; easier for limited-labour situations.
Pigeon pea: Perennial legume with deep tap root; 150–240 days; multi-season from one planting; drought-hardy.
Cowpea leaf market: Urban vegetable market for young cowpea leaves — often higher per-kg value than the grain.
Export spec: Grain type, colour, moisture, cleanliness, and defect limits that export buyers require; 30–80% premium over local price.
Group lot: 2–5 tonnes of same-variety, same-spec grain aggregated from multiple farms; the unit of access for export channels.
Starter N: A small (10–20 kg/ha) nitrogen dose at planting on uninoculated new land — bridges until nodules establish; not routine.
Hermetic storage: Airtight storage eliminating oxygen; kills weevils and moulds without chemicals.
Dal: South Asian term for split dried legume; East African chickpea and lentil enter this export market at premium prices.

🔗 Further Resources

CIAT (International Centre for Tropical Agriculture) — common bean variety database, disease and pest management for African bean systems.
ICRISAT — cowpea and pigeon pea varieties, legume systems for semi-arid Africa, hermetic storage resources.
Your national legumes programme and extension office — released varieties (colour, market type), pod borer threshold tables, and any export or outgrower programme.
PICS bag suppliers and hermetic storage programmes — find the nearest source and price per bag.
Rise Africa Skills companion courses: Maize (the intercrop cereal partner), Groundnut (the oil-crop legume counterpart), Soybean (inoculant lessons applied), Solar Drying (drying discipline).

🎓 Course Completion

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