Course Overview

Maize feeds more Africans than any other crop — and produces, on the same soils with the same seed, roughly 1.8 t/ha on average and 5–8 t/ha on well-managed plots. The yield gap is management, not genetics. This course teaches every management lever in sequence. Seed choice: hybrids for the commercial push (fresh each season), OPVs for food security and cash-constrained years. Population: rows 75 cm, stations 25–30 cm, thinned to one — the architecture of maximum cobs per hectare. Fertility: P in the furrow at planting, N split between basal and knee-height top-dress into moist soil, manure as the foundation. Pests: the push-pull system for stem borers and Striga, Fall Armyworm scouted from leaf whorls at 2–3 weeks (sand/ash into the whorl for small larvae), and MLN-tolerant varieties for East Africa. Harvest: black-layer maturity trigger, the aflatoxin prevention chain (prompt harvest, off-ground drying, 13–14% storage moisture, hermetic bags), and the critical insight that the season's financial outcome is decided not at planting but at storage — the lean-season hold strategy that converts a $3 PICS bag into a 30–100% price premium on the same grain.

What You Will Learn

Choose hybrid vs OPV by production goal; plan density at 44,000–67,000 plants/ha for the yield target
Plant at first reliable rains; cultivate deep; place P in the furrow and split N for maximum uptake
Scout Fall Armyworm from week 2–3; deploy push-pull for borers and Striga; identify MLN and streak
Weed twice in the critical 10–40 day window; manage water around silking as the highest-return irrigation
Harvest at black-layer maturity; run the aflatoxin prevention chain to hermetic storage at 13–14%
Choose grain channel (trader, mill, feed, cob) and deploy the lean-season hold strategy for 30–100% premium

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: Africa's Staple & the Yield Gap

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Lesson 1.1 — Maize: Africa's staple and its paradox

Maize feeds more Africans than any other crop — the staple grain of sub-Saharan Africa's maize belt from West Africa through East Africa to Southern Africa — yet average yields across the continent hover near 1.8–2 t/ha when the crop is demonstrably capable of 5–8 t/ha under good management on the same soils. This gap is not genetics: it is management. The yield-gap closers — hybrid seed, correct population, timely weeding, balanced fertility, and pest and disease management — are known, accessible and teachable. This course teaches all of them.

Season: 90–150 days by variety (early maturity for short rain-belts, long-season for higher-yield zones).
Markets: grain (household food, commodity trading, flour milling, animal feed) and fresh cobs (urban markets, roadside — premium per unit).
Climate: needs 500–800 mm well-distributed; drought at silking (tasselling-to-cob) is the single most damaging event.

Lesson 1.2 — Hybrid vs OPV: the most important field decision

Seed type	Yield ceiling	Seed cost	Best use
Hybrid	5–8 t/ha with inputs	Higher; must buy fresh each season	Commercial farms with full input package; market supply
OPV	3–4 t/ha with inputs	Lower; saveable 2–3 seasons	Food security; limited cash for inputs; drought-prone areas
Landrace	1–1.5 t/ha	Own saved; cheap	Cultural preference, niche use; not the yield play

Lesson 1.3 — Maize systems

Most African smallholder maize is intercropped (with beans, cowpea, pumpkin, or groundnut). Intercropping reduces risk, adds income and is often better total land productivity than monoculture — but population density must be maintained for both crops; cutting maize density "for the beans" is how intercropping underperforms. The push-pull system (maize + desmodium + napier grass border) controls stem borers and Striga simultaneously — the most effective integrated system in this college.

📺 Watch it done: From 1.8 to 5 t/ha — the five management levers that close the maize yield gap. Open curated video search → The written lesson above is complete on its own — the video is optional reinforcement.

Practical Assignment — Month 1: Survey your district: record hybrid seed prices vs OPV prices, their maturity days and any MLN or FAW ratings on the released list. Walk three neighbouring maize farms and estimate their stands (plants per row, row width) — is the population at or below the optimal? Research local grain prices in two windows: at harvest and in 3–4 months' time. Write one paragraph: your variety choice and one reason for each of the five yield-gap levers applied to your situation.

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. African maize average yields versus achievable yields are:

Why: The gap-close proof is in every managed trial: hybrid seed, correct population, timely weeding and balanced fertility routinely triple smallholder average yields.

2. Drought at silking (tasselling-to-cob) is:

Why: Silking is the two-week window when pollen must reach the silk for every grain. Drought here zeroes the cob — no recovery is possible.

3. Hybrid maize vs OPV:

Why: The seed decision is the first economics decision: buy hybrid for the commercial push, keep OPV for the food-security base or cash-constrained season.

4. Maize rainfall requirement is:

Why: Total rainfall misleads; distribution is the variable that decides the cob. A 700 mm season with a dry silking week is a failed crop.

5. Intercropping maize with beans or cowpea:

Why: The intercrop trap is cutting maize density 'for the beans.' Full density both crops is the productive system; reduced maize is just lost yield.

6. Push-pull (maize + desmodium + napier grass) controls:

Why: Two problems, one agronomic design: desmodium repels the stem borer moth, attracts its parasites, and triggers suicidal Striga germination — all at once.

7. Early-maturity vs long-season maize varieties:

Why: Season-length matching is the yield architecture: an early variety in a long-rain zone leaves weeks of productive growing season unused.

8. Maize markets include:

Why: Fresh cob marketing is underused by smallholders: urban and roadside markets pay premium per cob that grain price never matches.

9. Landrace maize varieties yield:

Why: Landraces carry local adaptation value but not commercial yield. Running a small landrace plot alongside an improved variety is balanced risk management.

10. The yield-gap closers for maize are:

Why: The course's central promise: every factor in the yield gap is a management decision. The agronomist who applies all five closers is the 5 t/ha farmer.

Month 2: Population, Fertility & Stand Establishment

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Lesson 2.1 — Land preparation and planting

Deep cultivation (30–35 cm) before rains breaks hardpan and channels root growth. On steep land, tied ridges or planting basins harvest runoff; on flat land, simple furrows concentrate moisture. Sow at first reliable rains — every week's delay after optimal window costs roughly 100–150 kg/ha in yield potential (stem elongation in stress, tasselling before cob ready, less season for grain fill).

Lesson 2.2 — Population: the architecture of yield

Setting	Spacing	Population
Standard rain-fed	Rows 75 cm, stations 25–30 cm, 1 plant after thinning	~44,000–53,000/ha
Hybrid high-input	Rows 75 cm, stations 20–25 cm, 1 plant	~53,000–67,000/ha
Intercropped with beans	Rows 90 cm, beans in row or between	Maize full density in maize rows; beans additional

Two seeds per station thinned to one at 2–3 weeks. Gap-fill within 2 weeks. A gappy stand is the second biggest yield thief after late planting.

Lesson 2.3 — Fertility: the four-way balance

Nitrogen (N): the primary yield driver; split: half basal at planting (compound), half top-dress at knee height (~5–6 weeks). Rule: top-dress when green grass is at knee, crop is knee-high, and soil is moist (urea in dry soil burns and volatilises).
Phosphorus (P): root and early cob development; placed in the furrow or hole at planting; immobile so placement matters most.
Potassium (K): stalk strength, disease resistance, grain quality; included in compound basal; additional K on light sandy soils.
Organic matter (manure/compost): the foundation all chemical fertilisers perform on; 2–3 t/ha ploughed in builds the soil that makes N, P and K work.

Micro-dose technique: on very low cash, place 1 bottle-cap of compound + 1 of urea per planting station — results in 30–50% yield gain over nothing at 5–10% of a full rate's cost.

📺 Watch it done: P in the furrow, N at the knee — the split-application discipline. Open curated video search → The written lesson above is complete on its own — the video is optional reinforcement.

Practical Assignment — Month 2: Prepare a fine-tilth plot with deep cultivation (30–35 cm); incorporate manure if available. Sow at first reliable rain: 2 seeds/station at your target spacing, P fertiliser placed in the hole at planting. At 2–3 weeks, thin to one plant per station and apply first N dose (to moist soil). Count your stand, record the thinning date and note any gaps for filling within 2 more weeks. At knee height (~5–6 weeks), apply the second N dose — only if soil is moist; record moisture conditions at the time.

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. Every week of delayed planting past the optimal window costs roughly:

Why: The calendar is a yield schedule. First reliable rains is the precision moment; later planting means a shorter grain-fill season and stress mismatches.

2. Standard rain-fed maize spacing is:

Why: Population density is cob-count architecture: enough to maximise ears per hectare without self-shading and competition.

3. Thinning to one plant per station happens at:

Why: Two seeds insure germination; one plant per station delivers yield. Crowded plants compete; gappy stands lose canopy efficiency — both are failure modes.

4. Nitrogen top-dressing rule is:

Why: The moist-soil rule doubles urea efficiency: the same kilogram split between 'after rain' and 'into dry soil' delivers half the yield response in dry soil.

5. Phosphorus is placed:

Why: P mobility in soil is near-zero: it stays where it lands. Furrow or hole placement at planting puts it where roots will find it at the most sensitive stage.

6. Manure/compost at 2–3 t/ha is:

Why: Chemical fertiliser on degraded organic-matter-depleted soil underperforms consistently. Manure is not an alternative to N and P; it is what makes N and P work.

7. Micro-dose technique (1 bottle-cap compound + 1 urea per station) gives:

Why: Placement efficiency compensates for small quantity: placing a small amount in the planting hole concentrates it at roots where it acts.

8. Potassium in maize provides:

Why: K-deficiency shows as stalk rot, lodging and poor filling after mid-season. Sandy soils lose K fastest; compound basal is the delivery vehicle.

9. Tied ridges or planting basins on sloped land:

Why: Water harvesting is the dryland amplifier: the same rainfall, more of it staying in the root zone, the same crop at higher effective moisture.

10. Deep cultivation (30–35 cm) before planting:

Why: A compacted hardpan is a ceiling on every input: roots stop, water pools, yield plateaus. One deep cultivation opens the soil for seasons.

Month 3: Stem Borers, Fall Armyworm & Maize Diseases

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Lesson 3.1 — Stem borers: Africa's most damaging maize pest

The African stem borer (Busseola fusca) and the spotted stem borer (Chilo partellus) are larvae that tunnel into maize stems, causing 'dead hearts' in young plants and entry holes + frass in stems later. The 2016-onwards arrival of the Fall Armyworm (Spodoptera frugiperda) — a new invasive from the Americas now across sub-Saharan Africa — added a second devastating foliar and stem pest that feeds from leaf whorls and is now often the primary yield threat. Management:

Push-pull system: desmodium in rows, napier grass on borders — the integrated biological system that consistently delivers 80–90% borer reduction.
Timely early planting: synchronising with rain onset reduces peak borer populations.
Fall Armyworm: scout leaf whorls from 2–3 weeks; sand/ash into the whorl kills young larvae; where chemical control justified, apply into the whorl at threshold (1–2 larvae per plant); Bt-based products or approved insecticides.
Early-season destruction of crop residues (where feasible) removes overwintering habitat.

Lesson 3.2 — Maize lethal necrosis (MLN) and other diseases

Maize lethal necrosis (MLN): a virus complex causing total leaf yellowing and death; devastating in East Africa since 2012. Use MLN-tolerant released varieties (tested and labelled), clean seed, and rogue infected plants early.
Maize streak virus: pale stripes on leaves, spread by leafhoppers; use resistant varieties (almost all released hybrid varieties carry streak tolerance).
Grey leaf spot / northern leaf blight / anthracnose: foliar fungal diseases; resistant varieties, wider spacing for airflow, rotation.
Ear rots (Fusarium, Aspergillus): grain mould producing mycotoxins, especially in stressed crops with insect damage. Early harvest, rapid drying and hermetic storage are the prevention chain.

Lesson 3.3 — Striga in maize

Striga (the Module 3 enemy of sorghum/millet) is equally devastating in maize on tired soils. The same stack applies: Striga-resistant varieties, fertility improvement, desmodium rotation, and hand-pulling before seeding.

📺 Watch it done: FAW in the whorl — and why push-pull beats spray programmes. Open curated video search → The written lesson above is complete on its own — the video is optional reinforcement.

Practical Assignment — Month 3: From 2–3 weeks, scout maize whorls weekly: pull back the youngest leaves in the whorl and look for FAW larvae (green-brown caterpillars with Y-shaped pattern on head capsule); count infested plants per 20 inspected. Record on a scouting sheet. Price sand, wood ash, and two approved insecticides locally. Where push-pull is possible, identify desmodium seed sources and napier grass locally. Note any disease symptoms (viral streaking, leaf spot lesions) with photographs where possible.

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. Fall Armyworm (Spodoptera frugiperda) arrived in Africa:

Why: A new invasive pest on top of native stem borers changed the pest calculus. FAW scouts from leaf whorls at 2–3 weeks; the response is exactly as for borers but faster-moving.

2. Push-pull system (desmodium + napier grass) reduces stem borers by:

Why: A designed ecosystem: desmodium repels adult borer moths and attracts their parasitoids; napier grass is a trap crop. Together they beat any spray programme on small farms.

3. Fall Armyworm control in the leaf whorl uses:

Why: The whorl is FAW's workshop and the control point: juvenile larvae in the tight whorl are easy to kill; adults feeding on leaves are much harder to reach.

4. Maize lethal necrosis (MLN) is managed by:

Why: A virus complex needs genetic resistance. East African released hybrid lists now carry MLN tolerance ratings — the column to check before buying.

5. Maize streak virus resistance is:

Why: Streak is so common that breeders packaged resistance into most released hybrids by default. Buying released seed is buying that resistance.

6. Ear rot mycotoxins (Fusarium, Aspergillus) are prevented by:

Why: Borer damage creates entry wounds; Aspergillus follows. Speed from the field to a dry sealed store closes the infection window.

7. Striga in maize is managed with:

Why: Striga is a cross-crop enemy. The soil-bank-draining logic works for maize, sorghum and millet: the pest, the solution and the discipline are identical.

8. Grey leaf spot and northern leaf blight are managed by:

Why: Canopy management plus resistance plus rotation removes the three favourable conditions: susceptible host, moisture trap and continuous host.

9. The classic 'dead heart' symptom in young maize is caused by:

Why: The borer tunnel is hidden; the dead central shoot is visible. Splitting stems from dead-heart plants reveals the larva and guides control decisions.

10. Maize crop residue destruction after harvest:

Why: The stalk is the pest hotel. Ploughing stalks in or feeding them to livestock closes the overwintering hotel for stem borers — the same principle as cotton stalk destruction.

Month 4: Weeds, Water & Intercrop Management

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Lesson 4.1 — Weeds: the early window

Maize is competitive but slow in the first 3 weeks. The critical weeding window is days 10–40: weeds before the crop canopy closes compete destructively for light, water and nutrients. Programme:

First weeding at 2–3 weeks (with thinning): the most important single field operation after planting.
Second weeding at 5–6 weeks: catches the late-germinator flush and completes the job before canopy close.
After knee height, maize shades weeds effectively — further weeding rarely pays.
Herbicide option: pre-emergent herbicides (applied to bare soil before emergence) or post-emergent selective (applied early, pre-canopy) where available and affordable; follow labels exactly.

Lesson 4.2 — Water management and drought strategy

Silking is the drought bull's-eye: 10–14 days before and after silk emergence, water stress causes pollen failure and blank rows — irrigation or supplemental water at this exact stage is the highest-return water investment in any crop.
Planting basins and tied ridges concentrate every rain event at the root zone — the dryland maize farmer's best tool.
Early-maturing varieties can be chosen to match the reliable rain window; or double-cropped in areas with two rain seasons.

Lesson 4.3 — Intercrop management in detail

The most productive intercrops keep maize at full density in maize rows (never reduce maize plant count for companion crops) and choose companions whose canopy, root depth and harvest season avoid direct competition: beans and cowpea finish before maize canopy closes them out; pumpkins and sweet potato sprawl between rows; groundnut fixes nitrogen while producing. The intercrop is the second crop — not a reason to thin the first.

📺 Watch it done: Silking drought — the 10-day window that decides the cob. Open curated video search → The written lesson above is complete on its own — the video is optional reinforcement.

Practical Assignment — Month 4: Complete both weedings on schedule (2–3 weeks and 5–6 weeks), recording dates, hours and weed species. Note whether the first weeding was before or after the competitive window closed. Observe your local rainfall pattern around silking: did the crop get water during tasselling and silk emergence? If not, note the blank-row pattern in harvested cobs (evidence of stress at silking). If an intercrop exists, count both crops' densities and assess whether maize density was maintained.

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. The critical maize weeding window is:

Why: Weeds in the first 40 days compete at exactly the stage maize is weakest. After knee height the crop wins the light war; before that, weeds do.

2. Second weeding at 5–6 weeks:

Why: Two timely passes capture nearly all the competitive damage. The crop's canopy close is self-weeding after that.

3. Pre-emergent herbicides are applied:

Why: The mode is soil barrier before any weed germinates. Missing the pre-emergent window means waiting for a different herbicide type.

4. Irrigation or supplemental water at silking is:

Why: Every grain requires a pollen grain + a working silk. Water stress collapses the silk's receptivity and the pollen viability simultaneously — no water = no grain.

5. Planting basins and tied ridges help maize by:

Why: Micro-catchments convert scattered rainfall into reliable root-zone moisture. A 600 mm season with basins can outperform a 750 mm season on bare flat ground.

6. Intercrop companion selection prioritises:

Why: The biological logic of intercropping: companions that fit the temporal and spatial gaps of maize's growing cycle earn without competing with it.

7. Maize density in intercrops must be:

Why: The intercrop trap: reducing maize to make room loses more maize yield than the companion is worth. Full density both crops is the productive system.

8. Double-cropping maize (two seasons per year) is possible where:

Why: Many African smallholders in bimodal rainfall areas already run two maize crops. Early varieties (90–100 day) are the tool; second crop is the bonus.

9. Maize's competitive window closes at:

Why: Two weedings capture the gain; the third (after canopy) is rarely economic. The crop earns its own weed suppression after week six.

10. The nutritional role of cowpea or groundnut in a maize intercrop is:

Why: The legume earns twice: income from its own harvest and nitrogen left in the soil for next season's maize — the system bonus captured within the same season.

Month 5: Harvest, Aflatoxin Prevention & Hermetic Storage

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Lesson 5.1 — Harvest timing: hard dough is the signal

Harvest when the grain is at physiological maturity: the black layer has formed at the grain base (visible when cracked open), husk is dry and white-bleached, grain thumbnail-hard. At this stage, moisture is ~25–35% — too high for storage but right for harvest. Don't wait for field-dry: birds and moulds take over after maturity. De-husk in the field; leave husks on if cob is to be hung-stored.

Lesson 5.2 — Drying: the aflatoxin prevention chain

Aflatoxin — a potent liver carcinogen produced by Aspergillus moulds — is maize's most dangerous post-harvest threat. The chain: insect damage + drought stress opens grain; Aspergillus invades; damp storage at >14% moisture amplifies the toxin. Prevention chain:

Harvest promptly at maturity — no waiting for field-dry.
Dry on racks or tarpaulins, not bare soil, not in piles — 3–7 days in good sun.
Shell and finish-dry shelled grain to 13–14% (bite test: crack, no dent).
Store in hermetic bags or drums (PurPlus, PICS, metal drums) — zero oxygen kills storage insects AND suppresses aflatoxin mould.
Test before selling into formal food channels where mycotoxin limits apply.

Lesson 5.3 — Storage and seed stock

Grain stock at 13–14%: clean sacks on pallets in dry store, or hermetic; check monthly.
Seed stock: hybrid seed from agro-dealer only (saved hybrid seed doesn't reproduce well); OPV seed saved from disease-free, early-maturing, well-filled cobs; dried to 12%, hermetic, cool, germination-tested before next season.

📺 Watch it done: Black layer to hermetic bag — the aflatoxin prevention chain. Open curated video search → The written lesson above is complete on its own — the video is optional reinforcement.

Practical Assignment — Month 5: Identify black-layer maturity by cracking 5 cobs and checking grain bases. Harvest promptly; de-husk in the field. Sun-dry on tarpaulins or racks (not soil) for 3–7 days. Shell a sample, do the bite test for 13–14% moisture, and record drying time. Store shelled grain in a PICS bag (if accessible) or clean sacks on a pallet. Seed: select 5 of the best cobs from the cleanest, earliest, most-filled rows; dry separately to 12% and seal in a tin or hermetic bag with the variety label and date.

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. The black layer at the grain base signals:

Why: The black layer is the plant's seal on a finished grain. It appears at ~25–35% moisture — too high for storage, correct for harvest. Speed to the drying floor counts.

2. Aflatoxin is produced by:

Why: The toxin is invisible, tasteless and odourless — and dangerous. The prevention chain (harvest, dry fast, hermetic storage) is the only defence.

3. The aflatoxin prevention chain starts with:

Why: Speed is the chain's first link. Aflatoxin risk builds from maturity onward; the harvest is the starting gate of the food-safety race.

4. Maize is dried on:

Why: Off-ground, airflow, sun: the three conditions that dry maize safely. Each 'wrong' condition adds an aflatoxin risk step.

5. Target storage moisture for maize is:

Why: The 13–14% window is safe for months in either storage type. Over-dried maize cracks during shelling; under-dried produces aflatoxin.

6. Hermetic storage (PICS bags, PurPlus, metal drums) works by:

Why: Zero oxygen is the universal kill switch for storage pests and the mycotoxin fungus simultaneously. The investment pays back in grain quality and food safety across seasons.

7. Saved hybrid maize seed is:

Why: F1 hybrid vigour doesn't pass to saved seed: the second generation is segregated, uneven and much lower-yielding. Fresh certified seed annually is the hybrid contract.

8. OPV maize seed saving requires:

Why: OPV seed improvement is the farmer's breeding programme. Selecting the best cobs, every season, compounds into a better-adapted variety.

9. Shelling grain for storage is done:

Why: Cobs shed moisture faster than whole heads; shelled grain dries uniformly. Storage of shelled grain also eliminates the borer habitat inside cob husks.

10. Hanging whole husked cobs for traditional storage:

Why: Traditional hung-cob stores (granaries, rafters) work in dry regions by keeping grain in natural cold-dry conditions. In humid areas, hermetic is always better.

Month 6: Markets, the Hold Strategy & the Business Plan

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Lesson 6.1 — Markets: beyond the farm gate

Channel	Buyer	Price / advantage
Household food security	Own family	The base — never sell before food is secured
Local trader / village market	Grain traders, town market	Immediate cash; lowest price; best for limited storage
Flour mill / processor	Milling companies, hammer-mill owners	Quality premium (dry, clean, graded); consistent volume opens doors
Animal feed mills	Poultry, livestock feed manufacturers	Volume buyers; steady market especially with poultry boom
Lean-season hold (3–6 months post-harvest)	All of the above at 30–80% higher prices	Hermetic storage is the enabler; the single highest-return financial decision in maize farming
Fresh cob (urban/roadside)	Urban consumers, roadside buyers	Highest $ per kg equivalent; small volume, high frequency

Lesson 6.2 — An honest one-hectare maize budget

Item	Assumption	Amount
Yield	Hybrid, full density, two weedings, split N, balanced P+K	~3.5–4.5 t/ha
Gross (harvest price)	$0.20–0.35/kg at harvest	~$700–1,575
Gross (lean-season price)	$0.35–0.55/kg, 3–6 months stored	~$1,225–2,475
Hybrid seed (25 kg)		$30–70
Compound basal + urea top-dress	150–200 kg compound + 100 kg urea	$100–250
Weeding labour ×2		$60–120
Harvest, shelling, drying, bags		$80–180
Hermetic storage (amortised)	PICS bag ~$3–5, lasts 3+ seasons	$5–15
Indicative margin	Lean-season sale scenario	~$900–1,700/ha — the hold strategy doubles income on the same crop

Lesson 6.3 — The hold strategy: hermetic storage as a financial tool

Selling immediately after harvest is the most common and most costly decision in African maize farming. Harvest-price to lean-season-price differentials of 50–100% are documented across the continent, every year. Hermetic storage converts the 3-dollar PICS bag into a financial instrument: same grain, same field, 3–6 months later, at a price 50–100% higher. The constraint is food security — the family must eat first, and the rest is the financial crop.

Lesson 6.4 — Records and the growth path

Per plot per season: variety and seed source; planting date (against first reliable rain); stand count at thinning; weed dates; fertiliser applications (product, rate, timing, soil moisture at top-dress); pest scout records (including FAW and MLN watch); harvest date and yield; drying days and moisture; sale date and price. Report card: stand count, yield kg/ha, and sale price vs harvest-day price (the storage premium captured). Growth path: year one — one hectare hybrid at full management; year two — add hermetic storage and lean-season sales; year three — group aggregation for mill/processor contracts and consistent premium channel.

📺 Watch it done: The $3 bag vs the 80% price premium — why hermetic storage is the highest-return maize investment. Open curated video search → The written lesson above is complete on its own — the video is optional reinforcement.

Practical Assignment — Month 6: Record this season's harvest-day price per kg. Research the same-grain price in your district 3 months later (ask traders, check markets). Calculate the premium percentage. Build the one-hectare budget from your recorded costs and local prices in two scenarios: sell at harvest vs sell at lean season (hermetic storage cost included). Identify your year-one channel (trader, mill, feed, cob). Research group aggregation options (cooperative, outgrower, processor relationship) for year-two or year-three entry.

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. Lean-season maize prices compared to harvest prices are:

Why: The price calendar is as reliable as the rain calendar. Harvest-day selling is the most common and most costly decision in smallholder maize farming.

2. The PICS hermetic bag (~$3–5) amortised over 3+ seasons:

Why: Three dollars paid once, three years of premiums earned: the PICS bag is the course's clearest return-on-investment story.

3. Selling immediately after harvest is:

Why: The price minimum happens precisely at harvest when every farmer sells at once. Holding even 2 months captures most of the annual differential.

4. The hold strategy rule is:

Why: Food security is the constraint, not a choice: hold what exceeds the family's food year, sell the rest at lean-season premium. The budget is only for surplus grain.

5. Flour mill / processor buyers reward:

Why: Industrial buyers pay for reliability. A farmer who delivers 3 t of 13% moisture clean grain every year earns relationship premium.

6. Animal feed mills are:

Why: The poultry course's feed demand is this course's market: the same continental boom that drives soybean demand drives maize-to-feed demand.

7. Fresh cob sales earn:

Why: A cob is a high-value food item. The street price per cob, converted to per-kg equivalent, often beats grain by 3–5×.

8. The three report-card numbers for maize are:

Why: Stand shows the architecture, yield shows the management, and the price ratio shows the financial discipline. One weak number reveals where the farm broke down.

9. Group aggregation into mill contracts by year three:

Why: The aggregation lesson runs through the whole college: individual sacks trade at commodity price; group tonnes trade at relationship price.

10. Year-one focus in maize is:

Why: Intensity before area: one perfect hectare teaches every skill; 10 average hectares teach only how to average. The discipline compounds.

🏆 Final Project: Your Maize Business Plan

The final project is your complete maize enterprise plan — variety choice, population plan, five yield-gap levers applied to your land, the aflatoxin prevention chain, and the hold strategy budget showing harvest vs lean-season income.

Variety & system case: hybrid vs OPV choice with evidence, maturity match to your rain window, MLN/FAW rating if relevant, and intercrop design if applicable.
Establishment plan: deep cultivation, planting date (first reliable rain), spacing at target population, P in the furrow, thinning schedule, gap-fill deadline, manure/compost availability.
Fertility schedule: N split (product, rate, timing, moist-soil rule), manure as foundation, K assessment for your soil type, micro-dose fallback if input-constrained.
Pest and disease calendar: FAW scouting routine (2–3 weeks onward, whorl inspection, record sheet), push-pull feasibility, MLN and streak watch, borer stover-management plan.
Harvest and aflatoxin chain: black-layer trigger, de-husking, drying schedule (racks, days, bite test), target moisture (13–14%), hermetic storage type and cost.
Budget & hold strategy: full hectare budget at two price scenarios (harvest vs lean season), the storage premium calculation, and your year-one sell decision with reasoning.
Risk page & year-3 vision: three risks (drought at silking, FAW outbreak, aflatoxin) with mitigations, and the staged path — one managed hectare, then hermetic hold, then group aggregation into mill/feed contract.

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 Hybrid Maize — Sell-at-Harvest vs Lean-Season Hold

The two-column budget is the course's business argument: same field, same crop, same costs, radically different income depending on the storage decision. The hermetic bag investment amortised over 3 seasons adds $1–5/ha — and captures $200–600/ha in seasonal price premium.

Item	Details	Typical cost (USD)
Hybrid seed (25 kg, fresh certified)	Released variety for your zone	$30–70
Compound basal fertiliser (150–200 kg)	P + N + K at planting	$70–160
Urea top-dress (100 kg at knee height)	Into moist soil only	$30–90
Manure/compost (2–3 t/ha)	Foundation fertility, ploughed in	$60–150
Land preparation (deep cultivation)		$60–120
Planting labour		$30–60
Weeding labour ×2		$60–120
Harvest, shelling & drying labour/equipment		$80–180
Hermetic storage bag (PICS, PurPlus)	~$3–5 each, amortised over 3 seasons	$5–15
Sacks, transport, market fees		$40–100
Contingency (10%)		$50–110
Total costs		$515–1,175
Harvest-day margin	3.5–4.5 t × $0.20–0.35/kg	~$350–900/ha
Lean-season margin	Same grain at $0.35–0.55/kg (3–6 months)	~$900–1,700/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

Physiological maturity: When the black layer forms at the grain base — the plant seals a completed grain; ~25–35% moisture.
Black layer: The dark layer at the grain tip-cap base signalling maturity — the harvest trigger.
Silking: The period when silk strands emerge from the cob tip and must receive pollen — the 10–14 day drought bull's-eye.
Fall Armyworm (FAW): Spodoptera frugiperda — an invasive pest from the Americas, now the primary maize pest across sub-Saharan Africa; scouted in leaf whorls.
African stem borer: Busseola fusca — native larval pest tunnelling into stems, causing dead hearts in young plants.
Push-pull system: Maize + desmodium companion + napier grass border — controls stem borers and Striga simultaneously through biological and chemical ecology.
Maize lethal necrosis (MLN): A virus complex causing total leaf yellowing; devastating in East Africa; managed by MLN-tolerant released varieties.
Aflatoxin: A potent liver carcinogen produced by Aspergillus moulds in damaged, stressed or improperly stored maize.
Hermetic storage: Airtight bags (PICS, PurPlus) or drums eliminating oxygen — kills storage insects AND suppresses aflatoxin mould; zero-chemical.
PICS bag: Purdue Improved Cowpea Storage bag — a three-layer hermetic grain storage bag for smallholders.
Split nitrogen: Applying N fertiliser in two instalments (basal + knee-height top-dress) to match crop uptake and reduce loss.
Micro-dose: Placing a small precise amount of fertiliser at the planting station — 30–50% yield gain at 5–10% of full-rate cost.
Lean-season price: The higher grain price (30–100% above harvest price) occurring 3–6 months after harvest when supply tightens.
Hold strategy: Storing grain in hermetic containers post-harvest and selling in the lean season — the course's highest-return financial decision.
Intercrop density: Maintaining both crops at full density in their respective rows — the productive rule intercrops violate when maize is thinned 'for the companion.'
OPV (Open-Pollinated Variety): A non-hybrid variety whose seed is saveable for 2–3 seasons without significant performance loss.

🔗 Further Resources

CIMMYT (International Maize and Wheat Improvement Centre) — African maize variety releases, FAW management guides, hermetic storage resources.
Your national maize programme and extension office — released hybrids with MLN/FAW ratings, fertiliser guidance for your soils, scout-and-spray schedules.
icipe push-pull resources — desmodium and napier grass sources, implementation guides.
PICS bag suppliers and hermetic storage programmes in your country — find the nearest supplier and compare prices.
Rise Africa Skills companion courses: Soybean (the nitrogen-rotation pair), Beans & Legumes (intercrop partners), Poultry & Piggery (feed grain customers), Groundnut (rotation and intercrop).

🎓 Course Completion

Complete all 6 months and pass the quizzes to unlock your Business Seed Record.

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