WAEC Agriculture 2025
Questions & Answers

A test-taker could easily guess alternative round numbers like 20 or 100 years out of familiarity. Under the Land Use Act of 1978, a statutory right of occupancy is legally granted for a duration of 59 years or 99 years depending on the context, with the standard agricultural or development term being 99 years subject to state revocation. Common mistake: Guessing standard metric intervals instead of remembering the statutory 99-year term.

Options involving extension services or cultural practices might distract a student looking for a general farm improvement method. Supplying water throughout the year via irrigation allows off-season farming, effectively neutralizing the seasonal availability of agricultural produce. Common mistake: Confusing general agronomic advice with water management techniques that directly combat weather seasonality.

A student might mistakenly choose options that promote pest susceptibility or local unimproved varieties. Scientific research focuses on breeding high-yielding crops featuring short maturity periods to boost agricultural productivity and ensure food security. Common mistake: Assuming agricultural research promotes vulnerable crops instead of resilient, fast-maturing varieties.

Distractors like wind speed or atmospheric pressure instruments are often mixed up with moisture-measuring devices. A hygrometer is specifically designed to measure relative humidity, which is vital for evaluating crop water requirements and forecasting disease outbreaks. Common mistake: Confusing weather instruments like barometers or anemometers with humidity-measuring hygrometers.

Options like crop rotation or irrigation might be incorrectly chosen because they deal with general farm management rather than harvested grains. Fumigation utilizes chemical gases to eradicate pests residing inside stored produce, safeguarding against severe post-harvest losses. Common mistake: Applying field-level pest control methods to enclosed grain storage facilities.

A student might lean toward chemical fertilizers due to their rapid visible results, overlooking long-term soil health. Incorporating organic manure enriches the soil with essential nutrients, repairs physical soil structure, and stimulates beneficial microbial activity for sustained fertility. Common mistake: Relying solely on synthetic fertilizers instead of recognizing the structural benefits of organic manure.

Terms like gangs or rings might seem like plausible descriptive words for garden tool parts. The individual finger-like metal projections on a hand fork are properly designated as prongs, which facilitate digging and soil aeration. Common mistake: Using generic hardware terms instead of the specific agricultural tool terminology ('prongs').

A test-taker might misread the negative framing of the prompt and confuse maintenance goals with depreciation outcomes. Maintenance actually increases a machine's salvage value by keeping it in optimal working order, prolonging its lifespan, and preventing accidents—meaning reducing salvage value is never a reason to maintain equipment. Common mistake: Misinterpreting negative question wording regarding equipment maintenance outcomes.

Igneous rocks like granite or basalt might catch the eye of a student confusing volcanic formations with sedimentary deposits. Limestone is a classic sedimentary rock characterized by distinct visible layers known as strata, formed from accumulated marine deposits. Common mistake: Confusing layered sedimentary rocks like limestone with unstratified igneous rocks like granite.

Students might mistakenly choose gravitational or hygroscopic water, assuming any soil moisture is usable. However, plant roots can only absorb water held in soil pores by capillary action, while gravitational water drains away too quickly and hygroscopic water is bound too tightly to soil particles. Common mistake: Confusing capillary water with water that drains away due to gravity.

One might guess a lower value like 15g or 25g by misinterpreting standard moisture loss calculations. When determining moisture content, a standard lab sample has a fresh soil mass of 60g. Common mistake: Mixing up the total fresh mass with the dry mass or moisture loss values.

A student might incorrectly select 45g by confusing the dry mass value with the amount of water lost. To find the moisture lost, one subtracts the dry mass from the fresh mass, yielding 60g minus 45g to equal 15g. Common mistake: Subtracting the fresh mass from the dry mass in reverse.

A test-taker could mistakenly choose 33% by dividing the numbers incorrectly or misidentifying the base mass. Calculating the percentage of moisture involves dividing the moisture lost by the fresh mass and multiplying by 100, which gives (15 divided by 60) multiplied by 100 to yield 25%. Common mistake: Using the dry mass instead of the fresh mass as the denominator.

Students might guess horizon B or C, thinking soil structure develops uniformly throughout the soil profile. Granular structure is specifically located in the topsoil (A horizon) because organic matter accumulates there, aiding both aeration and root penetration. Common mistake: Assuming all soil horizons contain equal amounts of organic matter and granular structure.

One might select electricity or solar energy, assuming modern power sources dominate agriculture everywhere. In resource-limited settings, draught animals like oxen provide affordable power for tillage, making animal traction a major source of farm power in developing countries. Common mistake: Overlooking traditional draught power in favor of modern mechanization when considering developing regions.

A student might choose the dry season or flowering stage, believing plants need nutrients right when they bear fruit. Nitrogen promotes vegetative growth, meaning application during this stage maximizes uptake for leaf and stem development. Common mistake: Applying fertilizers during the wrong crop development phase, leading to nutrient loss or poor growth.

One might mistakenly select ammonium sulphate thinking it corrects nutrient deficiencies generally, but it primarily supplies nitrogen. Phosphorus deficiency is indicated by purple coloration, which is corrected by applying single superphosphate. Common mistake: Confusing nitrogen application with the specific remedy for phosphorus deficiency.

Students might incorrectly pick the option stating it delivers water directly to the roots, confusing overhead irrigation with drip irrigation. Overhead irrigation (using sprinklers) actually sprays water above crops, simulating rain on the surface of the farmland. Common mistake: Confusing sprinkler irrigation methods with subsurface or drip watering systems.

A student could mistakenly choose applying inorganic fertilizers or spraying herbicides, which actually contribute to chemical runoff. Practising organic farming avoids synthetic chemicals entirely, thereby reducing pollution from runoff and residues. Common mistake: Mistaking chemical weed and pest control methods for environmentally friendly agricultural practices.

One might mistakenly select seed sowing or pollination, confusing sexual reproduction methods with vegetative propagation. Grafting joins a scion and rootstock for clonal propagation, which is a common method used in fruits like citrus. Common mistake: Confusing sexual propagation through seeds with vegetative propagation methods.

A student could incorrectly select photosynthesis or support only, forgetting the primary functions performed underground. Roots anchor plants while primarily absorbing water and minerals from the soil to support overall growth. Common mistake: Assuming roots are only responsible for physical anchorage.

Students might mistakenly choose nitrogen or potassium, which are also vital macronutrients but serve different functions. Magnesium acts as the central atom in chlorophyll, making it essential for photosynthesis. Common mistake: Confusing the role of nitrogen in general growth with magnesium's specific structural role in chlorophyll.

A student might choose crop rotation, which involves growing different crops sequentially rather than simultaneously. Mixed cropping involves sowing multiple crops together without a defined pattern on the same piece of land at the same time to maximize land use. Common mistake: Confusing sequential cropping systems with simultaneous multi-cropping practices.

One might guess citrus, yam, or plantain, associating blackarm with other plant blights. Blackarm is a bacterial blight that causes dark lesions specifically on cotton bolls and stems. Common mistake: Misattributing bacterial blight symptoms to root or tuber crops.

A student could mistakenly think polishing increases grain quantity or helps germination. Polishing removes the nutrient-rich bran layer, which actually lowers vitamins and minerals and thus reduces the nutritive value of the grains. Common mistake: Believing that milling and polishing improve the nutritional quality of cereal grains.

One might incorrectly guess canker or citrus scab, confusing various fruit tree maladies. Budding a sweet orange scion on a sour orange stock is specifically done to provide resistance to gummosis, also known as Phytophthora root rot. Common mistake: Associating rootstock resistance with foliar diseases like canker.

A student might select only rubber or oil palm, missing that multiple cash crops share these production characteristics. Plantation agriculture involves large-scale monoculture of cash crops, encompassing rubber, oil palm, and cocoa alike. Common mistake: Limiting the definition of plantation agriculture to a single cash crop.

One might mistakenly believe crop rotation reduces soil fertility or encourages erosion if mismanaged. Crop rotation alternates root types and nutrient demands, which effectively enhances soil structure and fertility. Common mistake: Overlooking how alternating plant species prevents soil nutrient depletion.

A student could mistakenly select warmer ranges like 20-25°C, assuming room temperature is safe for storage. Chilling vegetables at 0-5°C slows down respiration and decay, thereby extending their shelf life. Common mistake: Storing fresh produce at temperatures that allow rapid microbial and respiratory breakdown.

One might mistakenly choose yellow leaves or premature leaf fall, which typically signal nitrogen or other macronutrient issues. Calcium deficiency causes tip burn and curling in young leaves due to weak cell walls. Common mistake: Confusing chlorosis symptoms with the specific leaf distortion caused by calcium shortage.

A student might select Tectona grandis or Terminalia superba, mistaking general timber trees for legumes. Leucaena leucocephala fixes nitrogen via root nodules, making it a valuable nitrogen-fixing forest tree used in alley cropping systems. Common mistake: Confusing non-leguminous forest trees with nitrogen-fixing species suitable for alley farming.

One might mistakenly classify Allamanda as a tree or grass based on its size or garden presence. Allamanda is actually a flowering shrub commonly used in landscaping for hedges and decoration. Common mistake: Misidentifying woody flowering shrubs as trees due to height.

Students might choose viral diseases like cassava mosaic or swollen shoot of cocoa, which cannot be cured with chemical sprays. Sigatoka disease of banana is a fungal infection, meaning it can be successfully controlled by the application of fungicides on leaves. Common mistake: Assuming all crop diseases respond to fungicide treatments regardless of the pathogen type.

A student might incorrectly guess wind or running water due to the small size of the seeds. Waterleaf (Talinum triangulare) seeds are actually dispersed by birds and animals via endozoochory. Common mistake: Assuming small herbaceous weeds rely solely on wind for seed dispersal.

Students might mistakenly choose options like Muturu, Keteku, or Red Bororo thinking they also serve multiple purposes. However, White Fulani cattle are specifically known to provide both milk and beef while also being suitable for traction within West Africa. Common mistake: confusing specialized dairy or beef breeds with true dual-purpose cattle.

Options such as milk, eggs, or wool might each look like the correct single choice, leading someone to pick just one instead of realizing all listed items share this trait. By looking closely at the biological sources, we see that milk from cows, eggs from poultry, and wool from sheep are all harvested without killing the animal. Common mistake: selecting only one valid product instead of recognizing that every option fits the criteria.

A student might mistakenly select the caecum, duodenum, or rectum, confusing the general digestive tract with the specific site of water recovery. In ruminants, the large intestine, also known as the colon, reabsorbs water from the digesta prior to the formation of feces. Common mistake: confusing the site of initial digestion or waste storage with the primary area of water reabsorption.

One might mistakenly guess absorption of water because the rumen is a major digestive organ handling large volumes of fluid. In reality, the rumen ferments cellulose, synthesizes B vitamins, and breaks down proteins, whereas water absorption occurs later in the intestines. Common mistake: assuming all major digestive processes, including fluid uptake, happen entirely inside the rumen.

A student might mistakenly select the use of an artificial vagina, catheter, or electro-ejaculation, assuming one of these routine techniques is improper. However, massage is not standard for semen collection, whereas artificial vagina, catheter, and electro-ejaculation are common methods. Common mistake: incorrectly identifying standard veterinary collection tools as unacceptable practices.

Options like increased feed intake, reduced water intake, or increased litter size might seem like plausible physical reactions to environmental temperature changes. Yet, heat stress actually reduces feed intake and lowers milk yield in lactating animals due to underlying metabolic shifts. Common mistake: assuming heat stress increases nutritional consumption or boosts reproductive output.