JAMB Agricultural Science syllabus

Our note

This is the opening topic, and it fixes the vocabulary you will use for the rest of the syllabus. Agriculture is not just planting and rearing animals - the modern definition covers production, processing and marketing, so a farmer, a miller and a produce trader are all in agriculture. You also need to know how the subject splits into branches (crop production, animal production, agricultural engineering, economics, extension, forestry, fishery, soil science) and the difference between farming to feed your household (subsistence) and farming to sell for profit (commercial). Examiners like to test the advantages, disadvantages and problems of each type, so learn them as pairs.

• Modern definition of Agriculture covers production, processing AND marketing - not production alone.
• Branches include crop production, animal production, soil science, agricultural engineering, agricultural economics, agricultural extension, forestry and fishery.
• Subsistence agriculture: small scale, family consumption, simple tools, low yield, little or no surplus.
• Commercial agriculture: large scale, for sale/profit, mechanised, high capital, uses improved inputs.
• Be able to state advantages, disadvantages and problems for each type, not just define them.

Our note

Here you learn why agriculture is treated as the backbone of West African economies. The syllabus wants three levels of benefit: to the individual farmer (food, income, employment), to industry (raw materials that feed agro-allied factories), and to the nation (foreign exchange, government revenue, rural development, source of capital). A very common exam question pairs an agro-allied industry with the raw material it uses, so memorise those pairs directly.

• Benefits to the individual farmer: food, income, employment, shelter and clothing materials.
• Agro-allied pairs to memorise: cotton to textile mills, groundnut/oil palm to oil mills, cocoa to beverage/chocolate industry, hides and skins to leather/tanning, rubber latex to tyre industry, timber to furniture/paper.
• National contributions: foreign exchange earnings, government revenue (taxes and export duties), source of capital for other sectors.
• Agriculture is the largest employer of labour in most West African countries.
• Rural development: farming supports roads, markets, electricity and social amenities in the villages.

Our note

Ecology here means matching what is grown or reared to where it can survive. West Africa runs in belts from the wet mangrove and rainforest of the coast, through the derived and Guinea savanna, up to the dry Sudan and Sahel savanna in the north, and each belt has its own rainfall, vegetation and characteristic crops and animals. You must also separate abiotic factors (non-living: rainfall, temperature, sunlight, wind, soil, relative humidity) from biotic factors (living: pests, diseases, weeds, parasites, predators, man). Expect questions like which zone produces cocoa, or which factor is biotic.

• Zones from south to north: mangrove/swamp forest, rainforest, derived savanna, Guinea savanna, Sudan savanna, Sahel savanna.
• Rainfall and length of rainy season decrease as you move north; the dry season lengthens.
• Forest zone crops: cocoa, oil palm, rubber, kola, plantain, cassava. Savanna crops: cereals (sorghum, millet, maize), cotton, groundnut, cowpea.
• Cattle rearing thrives in the northern savanna partly because tsetse fly (and trypanosomiasis) is less prevalent there.
• Abiotic = non-living factors (rainfall, temperature, light, wind, soil, humidity); biotic = living factors (pests, diseases, weeds, parasites, man).

Our note

This is the most calculation-heavy topic in Section A. You need Mendel's first law (segregation) and second law (independent assortment), and you must be able to draw a Punnett square and read off ratios - 3:1 for a monohybrid F2 cross, 9:3:3:1 for a dihybrid F2, and 1:2:1 for genotypes. Know the difference between mitosis (body cells, two identical diploid cells) and meiosis (sex cells, four haploid cells, allows variation), and learn the terminology cold, because JAMB tests definitions of locus, allele, genotype, phenotype, dominance and recessiveness directly. Finally, learn the methods of improving crops and animals with the reason for each and its advantages and disadvantages.

• Mendel's first law (segregation): paired alleles separate during gamete formation, one to each gamete. Second law (independent assortment): members of different allele pairs assort independently.
• Monohybrid F2 phenotypic ratio 3:1 (genotypic 1:2:1); dihybrid F2 phenotypic ratio 9:3:3:1.
• Mitosis gives 2 identical diploid daughter cells (growth/repair); meiosis gives 4 haploid cells (gamete formation, source of variation).
• Terms: locus = position of a gene on a chromosome; alleles = alternative forms of a gene; genotype = genetic make-up; homozygous = like alleles (TT/tt); heterozygous = unlike alleles (Tt).
• Crop improvement methods: introduction, selection, crossing (hybridisation), quarantine - aims include higher yield, pest/disease resistance, early maturity, better quality.
• Animal improvement: introduction, selection, quarantine and breeding systems - inbreeding, line-breeding, cross-breeding, artificial insemination (AI).

Our note

Farm inputs are everything the farmer puts into the farm to get output. The syllabus names planting materials and agrochemicals as examples, but you should be able to classify inputs broadly - planting materials (seeds, seedlings, cuttings, suckers, stem cuttings), agrochemicals (fertilizers, herbicides, insecticides, fungicides), feeds and drugs for livestock, plus labour, capital, machinery and water. For each class be ready to state its use, since the objective is about classification and use.

• Planting materials: seeds, seedlings, suckers, stem cuttings, setts, corms, tubers.
• Agrochemicals: fertilizers (NPK, urea), herbicides (weed control), insecticides, fungicides, nematicides.
• Livestock inputs: feeds, feed supplements, vaccines, drugs and veterinary services.
• Other inputs: labour, capital, farm machinery/implements, irrigation water and land.
• Be able to match each input to its specific use, e.g. herbicide for weeds, fungicide for fungal diseases.

Our note

This topic is largely recall, and it carries a lot of acronyms, so it rewards straight memorisation. You must compare the traditional farming systems (shifting cultivation, bush fallowing, mixed farming, mixed cropping, monocropping, taungya, ley farming), then list the problems blocking agricultural development along with their effects and workable solutions. The research institutes are a favourite exam area: learn each institute's mandate crop and its location. Also know what ADPs and the national programmes were set up to do, and the year and government behind the famous ones.

• Shifting cultivation: farmer moves to new land and abandons the old; bush fallowing: land is rested for a period then returned to. Both restore fertility but need plenty of land.
• Problems: land tenure system, inadequate infrastructure, inadequate finance/credit, environmental degradation, poor storage and processing, illiteracy, pests and diseases, unstable prices.
• Institute mandates: CRIN - cocoa/coffee/kola/cashew/tea (Ibadan); NIFOR - oil palm (Benin); RRI - rubber (Benin); NCRI - cereals (Badeggi); NRCRI - root crops (Umudike); NIHORT - horticulture (Ibadan); IAR - Samaru, Zaria; IAR&T - Ibadan; FRIN - forestry (Ibadan); LCRI - Lake Chad Research Institute (Maiduguri).
• International institutes: IITA (tropical agriculture, Ibadan), ILRI (livestock), ICRISAT (semi-arid crops), WARDA (rice, West Africa).
• ADPs such as RTEP and FADAMA were set up to boost food production, transfer improved technology to farmers and raise rural incomes.
• National programmes: OFN (Operation Feed the Nation, 1976), Green Revolution (1980), NAFPP, NALDA, NARP, NCRPs and the Project Coordinating Unit (PCU).

Our note

This closing topic looks at agriculture as something governments and organisations deliberately shape. Fiscal policy - import duties, import bans, tariffs and tax reliefs - is used to protect local farmers and encourage local production, and you should be able to argue both the good and bad effects of such policies. The Land Use Act of 1978 is the named law to know: it vested land in the state governor, which made large-scale acquisition easier for government but harder for ordinary farmers to use land as collateral. Also learn the standard incentives (subsidies, credit, guaranteed minimum prices, extension services), the infrastructure government provides, and what NGOs contribute.

• Fiscal policies: import duties, ban on importation, tax relief and tariffs - used to protect and encourage local production; can also raise input costs.
• Land Use Act (1978) vested all land in a state in the Governor, held in trust; effect: eased government acquisition but limited farmers' use of land as loan collateral.
• Government incentives: input subsidies (fertilizer, agrochemicals), credit facilities and agricultural loans, guaranteed minimum prices, free extension services, crop insurance.
• Infrastructure: roads and transport systems, communication systems, electricity, irrigation, storage and processing facilities, markets.
• NGO contributions: funding and credit, training and workshops, supply of improved inputs, research support, rural/community development projects.
• Be ready to assess effects, not just list - each policy or incentive has advantages and drawbacks.

Our note

Soil is not just dirt - it starts as rock that has been broken down over long periods by weather, water, temperature changes and living things. This topic asks you to know the three main rock types (igneous, sedimentary, metamorphic), what breaks rocks down, and what the finished soil is made of. You must also be able to read a soil profile (the layers you see when you dig a pit) and describe soil's physical properties like texture and structure, and its chemical properties like acidity.

• Three major rock types: igneous, sedimentary and metamorphic
• Weathering is physical (temperature, water, wind), chemical (oxidation, hydrolysis, carbonation) and biological (roots, burrowing animals, humans)
• Soil profile horizons: O (litter), A (topsoil), B (subsoil), C (weathered parent rock), R (bedrock)
• Soil components by volume: about 45% mineral matter, 25% water, 25% air, 5% organic matter
• Soil texture is the proportion of sand, silt and clay; soil structure is how those particles clump into aggregates
• Soil pH below 7 is acidic and is corrected with lime; above 7 is alkaline and is corrected with sulphur or acidic fertilizers

Our note

Water in the soil is held in different ways, and only some of it is actually available to crops. This topic asks you to tell those forms apart and to work out how much water a soil can hold before a plant wilts. It then covers how soil is lost or degraded - by erosion, leaching, continuous cropping and burning - and the practices that prevent that. Finally, irrigation adds water where rainfall is short, and drainage removes it where there is too much.

• Capillary water is held in soil pores and is the main water available to plants; gravitational water drains away; hygroscopic water clings to soil particles and is unavailable
• Available water lies between field capacity and permanent wilting point
• Erosion types: splash, sheet, rill, gully and wind erosion
• Erosion control: mulching, cover cropping, contour ploughing, terracing, strip cropping, afforestation and windbreaks
• Leaching washes soluble nutrients (especially nitrates) down beyond the root zone
• Irrigation methods: surface/flood, sprinkler/overhead, drip and sub-surface
• Drainage methods: open surface ditches and underground/tile drains

Our note

A fertile soil supplies crops with the nutrients they need in the right amounts. Nutrients are grouped into macro-nutrients, needed in large amounts, and micro-nutrients, needed in traces - and the carbon, water and nitrogen cycles explain how they keep circulating. Living things in the soil, from bacteria to earthworms, break down organic matter and fix nitrogen. You should also be able to spot deficiency symptoms on a plant and say which nutrient is missing, and to calculate fertilizer ratios such as NPK 15:15:15.

• Macro-nutrients: N, P, K, Ca, Mg, S (plus C, H, O from air and water); micro-nutrients: Fe, Mn, Zn, Cu, B, Mo, Cl
• Soil flora (bacteria, fungi, algae) and fauna (earthworms, termites, nematodes) decompose organic matter and improve soil structure
• Rhizobium bacteria in legume root nodules fix atmospheric nitrogen
• Fertility is maintained by cover cropping, crop rotation, fallowing, green manuring, organic manure, mulching and fertilizer application
• Organic manure releases nutrients slowly and improves soil structure; inorganic fertilizer acts fast but can acidify soil
• Fertilizer application methods: broadcasting, band/row placement, side dressing, top dressing and foliar spray
• Nitrogen deficiency causes chlorosis and stunting; a 15:15:15 bag of 50 kg carries 7.5 kg each of N, P2O5 and K2O

Our note

Before planting, land must be cleared and the soil worked into a state seeds can germinate in. Tillage loosens the soil, buries weeds and shapes the seedbed into ridges, heaps, beds or flat land depending on the crop. But too much tillage exposes soil to erosion and destroys structure, which is why zero and minimum tillage exist. You should be able to argue why a particular method suits a particular crop, soil type and slope.

• Land preparation stages: clearing, stumping, ploughing, harrowing, ridging/bed making
• Primary tillage (ploughing) breaks and turns the soil; secondary tillage (harrowing) refines the seedbed
• Tubers such as yam and cassava are grown on ridges or heaps; cereals are often grown on flat land
• Zero tillage plants directly into undisturbed soil, usually after herbicide use; minimum tillage disturbs only the planting spot
• Advantages of reduced tillage: less erosion, moisture and organic matter conserved, lower cost
• Choice of tillage depends on crop type, soil type and texture, slope, rainfall, cost and available machinery

Our note

This topic is about crop plant structure: roots, stems, leaves, flowers, fruits and seeds, and what each one does. Crops split into two big groups - monocots such as maize and rice, and dicots such as cowpea and cotton - and they differ in seed leaves, leaf veins, root systems and flower parts. You also need to know storage organs, both what they look like outside (morphology) and how they are built inside (anatomy), because many Nigerian staples are storage organs we eat.

• Monocots: one cotyledon, parallel venation, fibrous roots, flower parts in threes, scattered vascular bundles
• Dicots: two cotyledons, network venation, tap root, flower parts in fours or fives, vascular bundles in a ring, with cambium for secondary growth
• Root functions: anchorage, absorption of water and mineral salts, sometimes storage
• Leaf functions: photosynthesis, transpiration and gaseous exchange
• Storage organs include tubers (yam - stem tuber; sweet potato - root tuber), rhizome (ginger), corm (cocoyam), bulb (onion) and swollen root (cassava, carrot)

Our note

This topic follows crop reproduction from the making of sex cells right through to a finished seed and fruit. Gametogenesis produces pollen grains in the anther and the embryo sac in the ovule. Pollination moves pollen to the stigma, then fertilization fuses the male and female gametes. In flowering plants this is double fertilization, and it is what turns the ovule into a seed and the ovary into a fruit.

• Microsporogenesis forms pollen grains in the anther; megasporogenesis forms the embryo sac in the ovule
• Self-pollination transfers pollen within the same flower or plant; cross-pollination transfers it to another plant of the same species
• Agents of pollination: wind, insects, water, birds and man
• Double fertilization: one male gamete fuses with the egg to form the zygote (2n), the other with the polar nuclei to form the endosperm (3n)
• After fertilization the ovule becomes the seed, the ovary becomes the fruit, and the integuments become the seed coat (testa)

Our note

Crops are raised either from seed (sexual) or from parts of a parent plant such as cuttings and suckers (asexual). With seeds you must know how to test whether they will still germinate, how much seed to sow per hectare, and the conditions germination needs. Vegetative propagation gives offspring identical to the parent and is used for cassava, yam, pineapple, citrus and many tree crops. The nursery is where delicate seedlings are raised under care before being transplanted to the field.

• Viability test methods: float test in water, germination/rag-doll test, and chemical (tetrazolium) test
• Percentage viability = (number of seeds germinated / total number sown) x 100
• Conditions for germination: water, oxygen, suitable temperature, viable seed and enzymes
• Epigeal germination brings the cotyledons above ground (cowpea, groundnut); hypogeal keeps them below (maize, rice)
• Vegetative methods: cuttings (cassava), suckers (banana, pineapple), budding and grafting (citrus, cocoa), layering, marcotting, tubers and setts (yam)
• A good nursery site is near a water source, well drained, close to the field, and protected from strong sun, wind and animals
• Harden off seedlings, water before lifting, and transplant in the evening or on a cool day to reduce transplanting shock

Our note

A cropping system is the arrangement of what is grown on a piece of land and when. Growing one crop alone is simple to manage but risky; mixing crops spreads risk and uses the land better. The planting pattern is how the seeds are actually placed - scattered, in rows, or in a continuous drill - and plant density is how many plants you end up with per hectare. Expect a calculation question: plant population per hectare is 10,000 square metres divided by the spacing.

• Monocropping/sole cropping grows one crop on a piece of land at a time; mixed cropping grows two or more together
• Mixed farming is crops plus livestock on the same farm, and is not the same as mixed cropping
• Relay cropping plants the second crop before the first is harvested; strip cropping grows crops in alternating bands across a slope
• Crop rotation alternates crops (e.g. legumes after cereals) to control pests, diseases and nutrient depletion
• Broadcasting scatters seed randomly and wastes seed; row planting and drilling ease weeding, spraying and harvesting
• Plant population per hectare = 10,000 m2 / (spacing between rows x spacing within rows), multiplied by the number of plants per stand
• Example: maize at 1 m x 0.5 m gives 20,000 stands per hectare; at 2 plants per stand that is 40,000 plants

Our note

This is the biggest topic in the section and the one most heavily examined. For each of the ten crop groups you are expected to know the common and scientific names, how the crop is propagated, how it is cared for from planting to harvest, how it is processed and stored, its main pests and diseases, and why it matters economically. Learn it group by group rather than crop by crop, and always attach the scientific name - JAMB asks for them directly.

• Scientific names to know: maize Zea mays, rice Oryza sativa, cowpea Vigna unguiculata, groundnut Arachis hypogaea, yam Dioscorea spp., cassava Manihot esculenta, oil palm Elaeis guineensis, cocoa Theobroma cacao, cotton Gossypium spp., rubber Hevea brasiliensis, sugarcane Saccharum officinarum
• Cereals and legumes are propagated by seed; tubers by setts, stem cuttings and vines; tree crops largely by seedlings, budding or grafting
• Husbandry practices: nursery/planting, thinning, supplying, weeding, fertilizer application, staking, mulching, pruning and pest control
• Processing examples: cassava into garri and flour, oil palm into palm oil and kernel oil, cocoa fermented and dried, rice parboiled and milled
• Store produce dry, well ventilated and protected from rodents and weevils; use cribs, silos, rhombus and barns
• Economic importance: food and nutrition, raw materials for industry, employment, income and foreign exchange earnings

Our note

Pastures are the grasses and legumes that livestock graze on, while forage is the material cut and carried to the animals. This topic asks you to name the common pasture grasses and legumes, establish and maintain a pasture, and conserve surplus growth as hay or silage for the dry season. It also links Nigeria's vegetation zones - from rainforest through guinea and sudan savanna to sahel - to the pasture species that dominate each. Range management is about using natural grazing land without destroying it.

• Pasture is grazed in place; forage is cut and fed to animals as soilage, hay or silage
• Common pasture grasses: Guinea grass (Panicum maximum), elephant grass (Pennisetum purpureum), Gamba grass (Andropogon gayanus)
• Common pasture legumes: Centrosema pubescens, Stylosanthes gracilis, Pueraria phaseoloides, Calopogonium
• Hay is forage dried to about 15-20% moisture; silage is forage fermented in a silo under airtight conditions
• Types of pasture: natural, semi-natural (improved) and artificial (established/sown)
• Range management practices: controlled/rotational grazing, avoiding overgrazing, paddocking, reseeding, controlled burning and providing water points

Our note

Floriculture is the growing of plants for beauty rather than for food - the trees, shrubs, hedges and flowers used to landscape homes, offices and public spaces. You need to be able to tell an ornamental tree from a shrub from a flower, and to name common Nigerian examples. You should also know how they are established and kept looking good, mainly through pruning, trimming, watering and manuring.

• Ornamental trees: royal palm, flamboyant (Delonix regia), Indian almond, whistling pine (Casuarina)
• Ornamental shrubs and hedges: hibiscus, Ixora, croton, Duranta, Thevetia
• Ornamental flowers: rose, zinnia, marigold, canna lily, sunflower
• Maintenance practices: pruning, trimming/clipping, weeding, watering, manuring, staking and pest control
• Uses: beautification and landscaping, shade, windbreaks, hedges and fences, erosion control, and income from cut flowers

Our note

A weed is simply a plant growing where it is not wanted, and it costs the farmer by competing with crops for water, nutrients, light and space. Weeds succeed because they grow fast, produce many seeds and spread easily, so you must know their characteristics and how they are dispersed. Control ranges from hand weeding and mulching to herbicides, and each has advantages and drawbacks. Note the syllabus wording: control includes trap cropping.

• Characteristics of weeds: fast growth, prolific seed production, easy dispersal, long seed dormancy, ability to reproduce vegetatively, hardiness
• Common weeds: spear grass (Imperata cylindrica), goat weed (Ageratum conyzoides), stubborn grass (Sida acuta), elephant grass, water leaf, Tridax
• Dispersal agents: wind, water, animals, man and explosive/self dispersal
• Effects: compete with crops, harbour pests and diseases, reduce yield and quality, raise cost of production, some are poisonous to livestock
• Control methods: cultural (mulching, cover cropping, crop rotation, tillage), mechanical/physical (hand weeding, hoeing, slashing), biological (natural enemies) and chemical (herbicides)
• Herbicides may be selective or non-selective, pre-emergence or post-emergence, and contact or systemic

Our note

Crop diseases are caused mainly by fungi, bacteria, viruses and nematodes, and they attack crops both in the field and in storage. For each you should know a named example, the symptoms it produces, how it spreads, and how it is controlled. The last part is often overlooked: chemicals used to control disease have side effects, including pollution, poisoning of non-target organisms and disturbance of the ecosystem, and the syllabus expects you to link each control method to its side effect.

• Fungal diseases: cassava anthracnose, maize rust, groundnut rosette (viral), leaf spot, damping-off, black pod of cocoa (Phytophthora)
• Bacterial diseases: bacterial blight of cassava, bacterial wilt of tomato
• Viral diseases: cassava mosaic, maize streak, groundnut rosette, cocoa swollen shoot - usually spread by insect vectors
• Nematodes such as root-knot nematode cause galls on roots and stunting
• Transmission is by wind, water, insect vectors, infected planting material, soil, tools and man
• Control: resistant varieties, certified/clean planting material, crop rotation, field sanitation, roguing, seed dressing and fungicides
• Side effects of chemical control: environmental pollution, poisoning of humans, livestock and beneficial organisms, residues in produce, and resistance build-up

Our note

Pests are organisms that damage crops in the field or in store, and they are classified by how they feed - biting and chewing, boring, or piercing and sucking. Knowing an insect's life cycle matters practically, because you attack the stage that does the damage or the stage that is easiest to kill. Insects go through either complete metamorphosis (egg, larva, pupa, adult) or incomplete metamorphosis (egg, nymph, adult). You must also know the main pesticide groups and how each acts on the pest.

• Biting and chewing pests: grasshoppers, locusts, armyworms, caterpillars - they tear leaves and defoliate crops
• Boring pests: maize stem borer, cowpea and maize weevils (Sitophilus zeamais, Callosobruchus maculatus) - they tunnel into stems and grains
• Piercing and sucking pests: aphids, cotton stainer, mealy bugs, capsids - they suck sap and transmit viruses
• Complete metamorphosis: egg, larva, pupa, adult (weevils, butterflies); incomplete: egg, nymph, adult (grasshopper, aphid, cotton stainer)
• Other pests: rodents, birds (quelea), monkeys, nematodes and mites
• Pesticide types by target: insecticides, rodenticides, nematicides, fungicides, herbicides; by action: contact, systemic, stomach poison and fumigants
• Control principles: field sanitation, early planting, resistant varieties, crop rotation, biological control and chemical control

Our note

Silviculture is the growing and managing of forests. Forests give timber, pulp for paper, fibre, fuelwood, gums, resins, chewing sticks and medicines, and they also protect soil and regulate climate. Because trees take long to mature, forests must be exploited under rules and replanted, which is what conservation, regeneration and afforestation mean. Taungya, alley cropping and ley farming are systems that combine trees with crops or pasture so the land keeps producing.

• Forest products: timber, pulp and paper, fibre, fuelwood, poles, gum, latex, resins, chewing sticks, herbs and wildlife
• Indirect benefits: soil and watershed protection, erosion and wind control, climate moderation, carbon storage, tourism
• Afforestation plants trees where there were none; reforestation replants land that was cleared
• Conservation methods: forest reserves, selective exploitation, regulation of felling by licence and girth limit, controlled bush burning, replanting after felling
• Taungya system lets farmers grow food crops among young forest tree seedlings until the canopy closes
• Alley cropping grows food crops between hedgerows of trees or shrubs; ley farming alternates crops with a period under pasture

Our note

This is the starting point of animal production: knowing which animals are kept in West Africa, what breeds exist within each species, where in the region each breed is found, and what each one is kept for (meat, milk, eggs, work, hides). You also need to recognise the animals from the outside — being able to name the parts of a cow, goat, pig, rabbit or fowl on a diagram. Exam questions here are often straightforward recall or diagram-labelling questions, so they are easy marks.

• Farm animals are grouped by species (cattle, sheep, goat, pig, rabbit, poultry) and then by breed within each species.
• Nigerian/West African cattle breeds include White Fulani (Bunaji), Sokoto Gudali, Red Bororo, Muturu, N'Dama and Keteku.
• Common goat breeds: West African Dwarf and Red Sokoto (Maradi); sheep: Yankasa, Balami, Uda and West African Dwarf.
• Uses of farm animals: meat, milk, eggs, wool/hair, hides and skins, manure, draught power and income.
• External features to know include the muzzle, dewlap, hump, withers, flank, udder and hock in cattle; comb, wattle, beak, shank and spur in poultry.

Our note

Animal husbandry has its own vocabulary, and JAMB regularly tests it directly. The terms cover the act of giving birth in each species, the names of young and adult males and females, mating terms, and the names given to the meat of each animal. Learn them as sets per species rather than as one long list, because the exam usually asks you to match a term to the right animal or process.

• Birth terms: calving (cattle), kidding (goat), lambing (sheep), farrowing (pig), kindling (rabbit).
• Mating terms: tupping/serving (sheep), servicing (cattle), covering; castration is removal of the testes of a male animal.
• Meat names: beef (cattle), veal (young calf), mutton (sheep), chevon (goat), pork (pig), venison (game/deer).
• Male/female terms: bull and cow, ram and ewe, buck and doe, boar and sow, cock and hen.
• Other common terms: broodiness, weaning, culling, dressing percentage, gestation and lactation.

Our note

Anatomy is about the structure of the animal's body and physiology is about how those structures work. The heaviest examined part is the digestive system, especially the difference between a ruminant like cattle (four-chambered stomach that ferments grass) and a non-ruminant like the pig or fowl (simple stomach). You also need the reproductive, respiratory, excretory and nervous systems, plus how weather and climate change — heat, humidity and daylength — affect growth, feeding, milk yield and egg laying.

• Ruminant stomach has four compartments: rumen, reticulum, omasum and abomasum (the abomasum is the true stomach).
• Non-ruminants (pig, rabbit, poultry) have a simple, single-chambered stomach; the fowl also has a crop, proventriculus and gizzard.
• Rumen micro-organisms digest cellulose, which is why ruminants can live on grass and non-ruminants cannot.
• Main body systems to compare: digestive, reproductive, respiratory, urinary (excretory) and nervous.
• High temperature and humidity cause heat stress: reduced feed intake, lower growth rate, lower milk and egg production, and reduced fertility; light (daylength) influences laying in poultry.

Our note

This topic follows the animal from the making of sex cells right through to the care of the newborn. You must know the oestrus (heat) cycle, how to recognise an animal on heat, how long each species carries its young, and which hormone does what. Poultry is treated separately because birds lay eggs instead of giving birth, so egg formation in the oviduct, incubation periods and hatching are examined on their own. Gestation and incubation periods are classic one-mark recall questions.

• Gametogenesis: spermatogenesis produces sperm in the testes; oogenesis produces ova in the ovary.
• Signs of heat include restlessness, mounting or standing to be mounted, swollen reddened vulva, mucous discharge and bellowing.
• Approximate gestation periods: cattle 280-283 days, sheep and goat about 150 days, pig about 114 days, rabbit about 30 days.
• Key hormones: FSH and LH (gamete development and ovulation), oestrogen (heat signs), progesterone (maintains pregnancy), oxytocin (parturition and milk let-down), prolactin (milk secretion).
• Incubation periods: fowl 21 days, duck 28 days, turkey 28 days, guinea fowl 28 days; the egg is formed in the oviduct, and colostrum is the first milk given to the newborn mammal.

Our note

Feeding is the biggest cost in livestock production, so this topic matters a lot in practice and in the exam. You need the classes of feed nutrients and what each does, the common pasture and forage crops of West Africa, and how grass is conserved as hay (dried) or silage (fermented in a silo). Ration formulation, especially the Pearson square method for balancing crude protein, comes up as a calculation question, and you must know the deficiency symptoms that tell you which nutrient is missing.

• Feed nutrients: carbohydrates and fats (energy), protein (growth and repair), minerals, vitamins and water.
• A balanced ration supplies all nutrients in the right proportion; a maintenance ration only keeps the animal alive with no gain, while a production ration is extra feed for growth, milk, eggs or work.
• Named forages: guinea grass, elephant grass, giant star grass, Andropogon sp and Calopogonium sp (a legume).
• Hay is forage dried to about 15 percent moisture; silage is forage fermented anaerobically in a silo.
• Deficiency signs: rickets from calcium/vitamin D, night blindness from vitamin A, anaemia from iron, goitre from iodine, kwashiorkor-type stunting and poor growth from protein shortage; correct by supplementing the missing nutrient with mineral licks, premixes or better-quality feed.

Our note

This is the practical, day-to-day running of a livestock enterprise: where the animals live, what they are fed, how the place is kept clean and how they are treated when sick, followed from birth all the way to slaughter. The three systems of management differ mainly in how much the animals are confined and how much the farmer spends. Exam questions often ask you to compare the advantages and disadvantages of intensive versus extensive systems.

• Extensive system: animals roam and graze freely, low cost and low capital, but slow growth, poor supervision and higher disease and theft risk.
• Intensive system: animals fully confined and fed by the farmer, high output and easy supervision, but high cost of feed and housing and fast spread of disease.
• Semi-intensive system combines confinement with some grazing or ranging.
• Housing must be well ventilated, dry, easy to clean and protect animals from rain, sun, thieves and predators.
• Routine management includes feeding, sanitation, vaccination, deworming, dipping, castration, weaning, culling, debeaking and record keeping.

Our note

Animal health is split into two halves: diseases caused by pathogens (viruses, bacteria, fungi, protozoa) and damage caused by parasites living on or inside the animal. For each disease you should be able to name the causal organism, the symptoms, how it spreads and how to prevent or treat it. For parasites, you need to tell endoparasites from ectoparasites, know which ones act as vectors, and be able to trace a life cycle such as that of the liver fluke or the tapeworm from egg to adult.

• Viral diseases: rinderpest, foot and mouth disease, Newcastle disease, fowl pox; viral diseases are prevented by vaccination, not cured by drugs.
• Bacterial diseases: anthrax, brucellosis, tuberculosis, fowl typhoid, mastitis; treated with antibiotics.
• Protozoan diseases: trypanosomiasis (spread by tsetse fly), coccidiosis; fungal: ringworm, aspergillosis.
• Endoparasites live inside the host (liver fluke, tapeworm, roundworm); ectoparasites live outside (ticks, lice, mites, fleas).
• Control measures named by the syllabus are dipping, spraying, deworming and sanitation; parasites cause weight loss, anaemia, low production, hide damage and death.

Our note

Fisheries covers fish farming from the pond to the market: the common food fishes, the three culture systems, what to check before siting a pond, how fish are caught and how they are preserved. Wildlife covers the conservation of wild animals in game reserves and national parks, why government sets them aside, and the laws that protect them. Both parts end with regulations, so learn the main rules that ban destructive practices.

• Common cultured fishes in West Africa: Tilapia, Catfish (Clarias), Heterotis and Mudfish.
• Culture systems: extensive (inland and deep sea fishing, lakes and rivers), semi-intensive (dams) and intensive (fish ponds).
• Pond siting and management factors: gentle slope, clayey water-retaining soil, reliable clean water supply, nearness to market, plus fertilization, liming and desilting.
• Harvesting gear includes drag nets, cast nets, hook and line and traps; processing and preservation is by curing (salting), sun-drying, smoking, freezing and canning.
• Fishery regulations ban the use of poison, chemicals and explosives, ban undersized mesh nets, restrict catching of immature fish and require licensing; game reserves conserve wildlife, protect endangered species, support tourism, research and education.

Our note

Apiculture is the keeping of honey bees for honey, beeswax and other hive products, and for the pollination service bees give to crops. The syllabus wants you to know why it is economically important, the difference between exotic and indigenous (local) bee types, the difference between traditional hives and modern movable-frame hives, and the tools and protective clothing a beekeeper uses. It is a short topic, so the marks are cheap if you learn the equipment list.

• Apiculture is the rearing and management of honey bees in hives (an apiary is the site where hives are kept).
• Products and importance: honey, beeswax, royal jelly, propolis, income and employment, and crop pollination.
• A colony has three castes: the queen (lays eggs), workers (sterile females that forage and build comb) and drones (males that mate with the queen).
• Methods: traditional bee-keeping uses log, pot or basket hives and destroys the comb at harvest; modern bee-keeping uses movable-frame hives such as the Langstroth and Kenya top-bar hive.
• Equipment and safety: hive, smoker, hive tool, bee veil, overall/bee suit, gloves, boots and honey extractor; work at dusk, use the smoker to calm the bees and cover all exposed skin.

Our note

Every farm, from a small compound plot to a large commercial estate, runs on four inputs: land, labour, capital and management. This topic asks you to know what each one is, where it comes from, and how it limits or boosts production. Land ownership is given special weight because in West Africa the way land is held (communal, inheritance, rent, purchase, gift, lease, government) decides whether a farmer will invest in it at all. Management is treated as a factor in its own right because the farm manager is the one who combines the other three.

• The four factors of agricultural production are land, labour, capital and management.
• Forms of land ownership in West Africa include communal, inheritance, purchase, gift, rent/leasehold, tenant-at-government-will and free-hold.
• Communal and fragmented holdings discourage long-term investment, mechanisation and use of land as loan collateral.
• Types of labour: family, hired (permanent, casual/temporary), communal and skilled/unskilled; sources include the family, the community and hired workers.
• Capital sources include personal savings, cooperatives, banks, government loans and money lenders; problems include high interest, lack of collateral and delayed disbursement.
• A farm manager plans, organises, staffs, coordinates, directs, controls and keeps records of the farm enterprise.

Our note

This is the economics theory part of the syllabus, applied to farming. You must be able to read demand and supply curves, find the equilibrium point where they cross, and explain what shifts them. The production function links inputs (fertiliser, seed, labour) to output, and shows why adding more of an input eventually gives smaller and smaller extra yield: the law of diminishing returns. You also need the calculation for elasticity of demand and supply, since agricultural produce behaves in a special way — food is usually inelastic, so a bumper harvest can crash prices and leave farmers worse off.

• Demand curve slopes downward, supply curve slopes upward; they meet at the equilibrium price and quantity.
• Elasticity of demand = percentage change in quantity demanded ÷ percentage change in price (same formula with quantity supplied for supply).
• Elasticity greater than 1 is elastic, less than 1 is inelastic, equal to 1 is unitary; most staple foods are price-inelastic.
• The three stages of production: Stage I (increasing returns), Stage II (diminishing returns — the rational stage where production should take place), Stage III (negative returns).
• Law of diminishing returns: as more of a variable input is added to a fixed input, marginal output eventually falls.
• Features of agricultural production: small and fragmented holdings, biological limits and long gestation, dependence on weather and climate, seasonality, perishability and bulkiness of produce.
• Scale of preference is the list of wants in order of importance; choice means picking the most pressing want, and what you give up is the opportunity cost.

Our note

Labour management is about getting the best work out of the people on the farm. Good supervision, fair wages, training, incentives and safe working conditions all raise labour efficiency, which is the amount of work a worker can do well in a given time. You should also know the categories of farm workers — permanent, casual, skilled, unskilled, family and communal — because each is paid and supervised differently. Finally, a farm employer must obey national labour laws covering minimum wage, working hours, child labour, leave and workers' compensation.

• Labour efficiency is raised by good supervision, adequate wages, incentives/bonuses, training, welfare, tools and safe conditions.
• Permanent labour is employed all year round; casual/temporary labour is hired for a short peak period such as harvesting.
• Other labour types/sources: family labour, communal labour, skilled and unskilled labour, contract labour.
• Labour laws cover minimum wage, hours of work, leave, child-labour restrictions, trade union rights and workmen's compensation.
• Poor labour relations lead to low output, absenteeism, strikes and high labour turnover.

Our note

This is the biggest topic in the section and the one examiners love, because it mixes theory with simple calculations. You need the qualities and functions of a farm manager, the different farm records and why they are kept, and how to work out gross profit, net profit, depreciation and salvage value. Depreciation questions are almost guaranteed, so master the straight-line formula. Insurance and financing round it off: insurance spreads the risk of fire, flood, pest and disease losses, while financing supplies the money, and both have well-known problems in Nigeria such as illiteracy, poor records and lack of collateral.

• Farm records include farm diary, inventory, production/yield, labour, input, sales/income, expenditure, payroll and livestock records; the profit and loss account book shows the farm's financial position.
• Records are kept to measure profit, plan production, secure loans, compute tax, value the farm and settle disputes.
• Gross profit = total revenue − total variable cost; Net profit = gross profit − fixed costs (total revenue − total cost).
• Depreciation (straight-line) = (cost of asset − salvage value) ÷ estimated useful life in years.
• Salvage (scrap) value is what an asset is worth at the end of its useful life; appreciation is a rise in an asset's value, as with land or breeding stock.
• Types of agricultural insurance: crop, livestock, farm building/equipment, fire, and accident/life cover for farm workers.
• Problems of agricultural insurance and finance include farmers' illiteracy and ignorance, poor record-keeping, lack of collateral, high premiums and interest, difficulty in loss assessment, and delayed loan disbursement.

Our note

Growing food is only half the job; it must reach the consumer in good condition and at a price that rewards the farmer. Marketing covers everything that happens between the farm gate and the final buyer — assembling, transporting, processing, storing, grading, financing and selling. The marketing channel is the chain of agents the produce passes through, and the more middlemen in that chain the more the farmer's share of the final price shrinks. Agricultural produce also has awkward physical qualities — it is perishable, bulky, seasonal and variable in quality — and these make marketing harder and more costly than for manufactured goods.

• Marketing functions: assembling, transportation, storage, processing, grading and standardisation, packaging, financing, risk-bearing and market information.
• A typical channel runs: farmer → assembler/local buying agent → wholesaler → retailer → consumer.
• Marketing agents include assemblers, commission agents, brokers, wholesalers, retailers, cooperatives and marketing boards.
• Long channels with many middlemen reduce the farmer's share of the consumer price and raise the final price.
• Characteristics of farm produce affecting marketing: perishability, bulkiness, seasonality of supply, variation in quality, and inelastic demand.
• Other marketing problems: poor roads and transport, inadequate storage and processing facilities, price fluctuation and poor market information.

Our note

Agricultural extension is informal, out-of-school education that carries research findings from the laboratory and university to the farmer in the village, and carries the farmer's problems back to the researchers. The extension agent is the link. You should know the bodies involved — ADPs, faculties of agriculture, research institutes such as IAR&T, NCRI and NIFOR, and farmers' cooperatives — and the three groups of teaching methods: individual (farm and home visits), group (demonstrations, field days, meetings) and mass (radio, television, posters, bulletins). The last sub-topic is a standard essay: list the problems and match each with a solution.

• Extension is out-of-school education that helps farmers adopt improved practices and links them with researchers.
• Extension methods fall into three classes: individual (farm/home visits, office calls), group (result and method demonstration plots, field days, meetings) and mass media (radio, television, newspapers, posters, bulletins).
• Result demonstration shows that a practice works; method demonstration shows how to do it.
• ADPs, universities, research institutes and cooperative societies supply improved inputs, training, credit and research results.
• Problems: inadequate funding, too few extension agents to farmers, illiteracy and conservatism of farmers, poor transport and rural roads, language barriers, poor research–extension linkage.
• Solutions: train and employ more agents, adequate funding, adult education for farmers, better rural infrastructure, use of local languages and mass media, and stronger research–extension–farmer linkage.

Our note

Before anything is built or planted, a farmer must know the exact shape, size and slope of the land. Surveying is the measuring of that land, and farmstead planning is deciding where the house, barns, pens, stores and roads will sit on it. This topic asks you to know the equipment used (chain/tape, ranging poles, compass, prismatic compass, levelling instruments, pegs and arrows), how each is used and cared for, the common survey methods, and the principles that guide a sensible farm layout.

• Surveying determines the size, shape, boundaries and topography of farmland before layout and construction.
• Common surveying equipment: measuring tape/chain, ranging poles, arrows, pegs, prismatic compass, ranging rod, levelling instrument, plane table.
• Equipment care: clean after use, oil metal parts to prevent rust, store dry, avoid dropping delicate instruments.
• Common survey methods include chain (tape) survey, compass survey, plane table survey and levelling.
• Factors in farmstead planning: topography/slope, soil type, water supply, road access, direction of prevailing wind, farm size, security, and nearness of buildings to one another.
• The farmstead outlay should place related units close together while keeping animal houses downwind of the dwelling.

Our note

Simple farm tools are the hand tools most Nigerian farmers still depend on daily — cutlass, hoe, rake, spade, watering can, secateurs and so on. You should be able to recognise each one, say exactly what job it does, and explain how it is kept in good order. Examiners often ask you to weigh their cheapness and availability against their slowness and the drudgery they involve compared with machines.

• Common simple farm tools: cutlass/machete, hoe, spade, shovel, rake, axe, hand fork, hand trowel, watering can, secateurs, sickle, wheelbarrow, garden line, budding/pruning knife.
• Maintenance: clean soil off after use, sharpen cutting edges, oil or grease metal parts, replace loose handles, store in a dry shed.
• Advantages: cheap to buy, easy to use and repair, no fuel needed, suitable for small plots and rough or stumpy land, provides employment.
• Disadvantages: slow, labour-intensive and tiring, covers only small areas, low output, unsuitable for large-scale commercial farming.
• Each tool must be matched to its job (hoe for tilling and weeding, cutlass for clearing, secateurs for pruning).

Our note

A machine has its own engine or power source (a tractor, a milking machine, a combine harvester); an implement has no engine of its own and must be attached to a machine to work (a plough, a harrow, a ridger, a planter). The syllabus wants you to tell the two apart, group machines by the operation they perform, and know the routine servicing that keeps them running.

• Machinery = self-powered equipment (tractor, combine harvester, milking machine, sheller, incubator); implements = attachments drawn or driven by machinery (plough, harrow, ridger, planter, sprayer, trailer).
• Tillage implements: plough (primary tillage, cuts and turns soil), harrow (secondary tillage, breaks clods), ridger (makes ridges).
• Machines are classified by use: land clearing, tillage, planting, crop maintenance/spraying, harvesting, and processing.
• Daily maintenance: check engine oil, fuel, water/coolant, tyre pressure and grease points before use.
• After-use maintenance: clean off soil and plant debris, sharpen or replace worn parts, oil bare metal, store under shelter.
• Follow the manufacturer's manual and service at the stated intervals; only trained operators should run machinery.

Our note

Farm power is whatever supplies the energy for farm work — human muscle, work animals, engines, electricity, wind, water and solar. Mechanization means replacing muscle power with machines. This topic asks you to compare these power sources, list the gains and losses of mechanization, and discuss honestly why mechanized farming has struggled in West Africa while still having a future here.

• Sources of farm power: human, animal (bullocks, donkeys, camels), mechanical/engine, electrical, wind, water (hydro) and solar power.
• Animal power suits small farms and tsetse-free areas; it is cheap but slow, and animals tire and need feeding and health care.
• Advantages of mechanization: timeliness of operations, larger area cultivated, higher output and productivity, reduced drudgery, less dependence on scarce labour.
• Disadvantages of mechanization: high cost of purchase and maintenance, displacement of farm labour (unemployment), soil compaction and erosion, destruction of soil structure and organisms, need for large continuous land.
• Problems in West Africa: fragmented small holdings, land tenure system, stumps and boulders on cleared land, scarcity of spare parts and skilled operators, high cost of fuel and machines, poor credit facilities, unfavourable topography.
• Prospects: land reform and consolidation, government tractor-hiring schemes, training of operators, local fabrication of machines, and credit/subsidy support.

Our note

Processing turns raw farm produce into a form that can be eaten, sold or kept longer — cassava into gari, paddy into milled rice, groundnut into oil. Storage keeps the produce safe from moisture, pests, rodents and mould until it is needed. You should be able to contrast the traditional village methods with modern mechanized ones and match each crop to a suitable store.

• Importance of processing: reduces bulk and spoilage, adds value and income, prolongs shelf life, removes toxins (e.g. cyanide in cassava), creates employment and by-products for livestock feed.
• Gari processing: harvesting, peeling, washing, grating, bagging/dewatering (pressing), sieving, frying, cooling and packaging.
• Rice processing: parboiling, drying, milling/hulling, winnowing and destoning; groundnut: shelling, roasting, grinding and oil expression.
• Traditional methods use hand tools and are slow with low quality; modern methods use machines, are faster, more hygienic and give uniform products but cost more.
• Storage structures: rhombus, crib, barn, silo, cold room, warehouse, earthen pot, ceiling/smoking above the hearth.
• Match crop to store: grains in silos or cribs after drying to safe moisture, yams in barns, vegetables and fruits in cold rooms; treat with approved chemicals and keep stores dry, clean and rodent-proof.

Our note

Biotechnology is the use of living cells and organisms, or parts of them, to make useful products or improved plants and animals. At UTME level you mainly need the vocabulary — tissue culture, anther culture, in vitro fertilization, genetic engineering — and the reasons these techniques matter to agriculture, such as multiplying disease-free planting material quickly or breeding crops that resist pests and drought.

• Tissue culture: growing whole plants from small pieces of plant tissue on a sterile nutrient medium, giving many identical disease-free seedlings quickly.
• Anther culture: culturing anthers/pollen to produce haploid plants used in breeding.
• In vitro fertilization: fusing egg and sperm outside the body ('in glass'), used with embryo transfer to multiply superior livestock.
• Genetic engineering: transferring genes from one organism into another to give a desired trait (GMOs).
• Importance: improved yield and quality, pest, disease and drought resistance, faster breeding, production of vaccines, and preservation of germplasm.
• Related terms to know: clone, embryo transfer, artificial insemination, transgenic organism.

Our note

Information and communication technology has entered the farm: computers store records, predict weather and disease outbreaks, and calculate balanced livestock rations, while phones and the internet give farmers prices, advice and buyers. You should know the basic parts of a computer and be able to say clearly what each ICT application does for the farmer.

• Computer components: input devices (keyboard, mouse, scanner), the system unit (CPU with control unit, ALU and memory), output devices (monitor, printer) and storage devices.
• Hardware is the physical parts; software is the programs that run on them.
• Computer uses in agriculture: weather and disease forecasting, ration formulation for livestock, farm records and databases, simulation studies, farm budgeting and accounting, mapping and irrigation control.
• Communication gadgets — mobile phone, radio, television, internet, GPS — deliver market prices, extension advice, weather alerts and e-marketing.
• Benefits: faster and more accurate decisions, better records, wider market access, reduced losses.
• Limitations in rural areas: cost of gadgets, poor electricity and network coverage, and low computer literacy among farmers.

Our note

Agricultural progress comes from experiments, and experiments must be planned and read correctly. This topic gives you the language of research — hypothesis, treatment, control, replication, randomization — and the simple statistics used to summarise results: mean, median and mode, plus an awareness that experimental errors exist and must be reduced. Expect calculation questions on mean, median and mode.

• Hypothesis: a testable statement or intelligent guess the experiment sets out to prove or disprove.
• Treatment: the factor deliberately applied to a plot or animal group; control: the untreated plot or group used for comparison.
• Replication (repeating treatments) and randomization (assigning treatments by chance) improve reliability and reduce bias.
• Mean = sum of values divided by number of values; median = middle value when arranged in order; mode = the most frequently occurring value.
• Experimental error is the variation not caused by the treatment; it is reduced by replication, randomization, uniform plots and careful measurement.
• Inferences are drawn by comparing treated results with the control, and results are presented in tables, bar charts, pie charts or graphs.