Agricultural Science past questions: WAEC SSCE 2023

49 objective questions, with answers. Free to read and practise.

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49 questions, one at a time, marked as you go or at the end. No account needed.

1.
A beneficial effect of bush burning is that it
1. A.replenishes oxygen in the atmosphere
2. B.increases the organic matter of soil
3. C.encourages the regeneration of grasses
4. D.increases the population of soil microorganisms
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Answer: C encourages the regeneration of grasses
2.
A combine harvester is mainly used for harvesting
1. A.tomato
2. B.groundnut
3. C.pepper
4. D.rice
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Answer: D rice
3.
A major reason for encouraging afforestation in arid regions of West Africa is to
1. A.serve as forest reserve for wildlife conservation
2. B.serve as windbreak to check desert encroachment
3. C.increase timber production for export
4. D.provide shade for crops sin taungya farming
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Answer: B serve as windbreak to check desert encroachment
4.
A pest of honeybee is
1. A.bird
2. B.grasshopper
3. C.lizard
4. D.tick
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Answer: B grasshopper
5.
Assuming a sow was serviced on May 1 and conceived the same day, the expected date of parturition is
1. A.June 2
2. B.September 30
3. C.August 24
4. D.October 2
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Answer: B September 30
6.
Cotton stainer is an insect pest of
1. A.cotton
2. B.pepper
3. C.okro
4. D.onion
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Answer: A cotton
7.
Day-neutral crops are crops that produce flowers regardless of
1. A.daylength being longer than the length of night
2. B.extremely low temperature
3. C.amount of sunlight received by flowering plants
4. D.extremely high temperature
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Answer: C amount of sunlight received by flowering plants
8.
Examples of cover crops are
1. A.Centrosema pubescens and Mucuna utilis
2. B.Moringa oleifera and Imperata cylindrica
3. C.Panicum maximum and Pennisetum purpureum
4. D.Calopogonium mucunoides and Gliricidia sepium
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Answer: A Centrosema pubescens and Mucuna utilis
9.
Grading of farm produce is important because it
1. A.maintains produce quality
2. B.prolongs storability
3. C.facilitates pricing
4. D.facilitates transportation
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Answer: C facilitates pricing
10.
High relative humidity in a brooder house could lead to
1. A.reduced feed intake
2. B.production of dry litter
3. C.build up of pests and diseases
4. D.heat stress
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Answer: C build up of pests and diseases
11.
If 200 ml of water was poured on a soil sample in a beaker and 25% of the water drained through the soil, determine the amount of water retained in the soil.
1. A.25 ml
2. B.175 ml
3. C.50 ml
4. D.150 ml
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Answer: D 150 ml
12.
If the seed rate for the cultivation of cowpea is 25 kg per hectare, determine the quantity of cowpea seeds required to cultivate a farmland measuring 100 m by 500 m.
1. A.125 kg
2. B.50 kg
3. C.250 kg
4. D.1,250 kg
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Answer: A 125 kg
13.
In a poultry farm, 2,000 birds were laying an average of 1,680 eggs per day. Use this information to answer the question What is the percentage of birds that did not lay eggs?
1. A.16%
2. B.84%
3. C.19%
4. D.46%
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Answer: A 16%
14.
In a poultry farm, 2,000 birds were laying an average of 1,680 eggs per day. Use this information to answer the questionIf an egg tray contains 30 eggs, how many trays of eggs will be collected in one week?
1. A.240
2. B.526
3. C.286
4. D.392
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Answer: D 392
15.
In order to backup extension messages, an extension agent should
1. A.provide marketing channels for farmers
2. B.assist farmers in locating sources of farm inputs
3. C.procure agricultural loans for farmers
4. D.provide modern machines to farmers
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Answer: B assist farmers in locating sources of farm inputs
16.
Maceration is carried out in the processing of
1. A.paddy rice
2. B.oil palm
3. C.cotton
4. D.cocoa
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Answer: B oil palm
17.
Monocotyledonous crops are characterized by
1. A.parallel-veined leaves
2. B.woody stems and branches
3. C.taproot system
4. D.net-veined leaves
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Answer: A parallel-veined leaves
18.
Ornamental plants are primarily cultivated to
1. A.provide fodder for livestock
2. B.beautify the environment
3. C.serve as mulching materials
4. D.serve as raw materials
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Answer: B beautify the environment
19.
Post-planting operations in cocoa plantation include I. rogueing II. stumping III. mulching
1. A.I and II only
2. B.I, II and III
3. C.I and III only
4. D.II and III only
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Answer: B I, II and III
20.
Rural-urban migration of farm labour could be prevented by
1. A.increasing the cost of acquiring farmland
2. B.employing more extension agents for farmers
3. C.increasing the size of farmland for cultivation
4. D.establishing agro-based industries in villages
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Answer: D establishing agro-based industries in villages
21.
Seedlings are best transplanted in the field
1. A.early in the morning and late in the evening
2. B.at midday and at dusk
3. C.early in the morning and at midday
4. D.late in the morning and late in the evening
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Answer: A early in the morning and late in the evening
22.
Soil structure is described as the
1. A.proportion of different sizes of soil particles
2. B.degree of water percolation within the soil
3. C.degree of soil aeration within the soil
4. D.arrangement of soil particles into aggregates
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Answer: D arrangement of soil particles into aggregates
23.
Steaming up ration should be fed to
1. A.pregnant animals
2. B.weaned young animals
3. C.breeding female animals
4. D.lactating animals
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Answer: A pregnant animals
24.
Study the table below and use it to answer the question
Cost Price (N) Useful Life (Life) Salvage value (N) Annual depreciation (N) Total depreciation
20000 Y 5000 1000 annum 15000
60000 10 18000 4200 annum Z
The useful life represented by Y in the illustrated table is
1. A.3 years
2. B.4 years
3. C.15 years
4. D.20 years
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Answer: C 15 years
25.
Study the table below and use it to answer the question
Cost Price (N) Useful life (Years) Salvage value (N) Annual depreciation (N) Total depreciation
20000 Y 5000 1000 annum 15000
60000 10 18000 4200 annum Z
The total depreciation represented by Z in the illustrated table is
1. A.N 42,000
2. B.N78,000
3. C.N 22,200
4. D.N 55,800
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Answer: A N 42,000
26.
The bacterium which is responsible for conversion of ammonium compounds to nitrites in the nitrogen cycle is
1. A.Nitrobacter
2. B.Nitrosomonas
3. C.Azotobacter
4. D.Rhizobium
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Answer: B Nitrosomonas
27.
The diagram above illustrates a farm operation. Study it and answer the question Examples of crops which require the illustrated farm operation are
1. A.cowpea, millet and okro
2. B.maize, pepper and tomato
3. C.rice, groundnut and millet
4. D.pepper, rice and cowpea
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Answer: C rice, groundnut and millet
28.
The diagram above illustrates a farm operation. Study it and answer the question The illustrated farm operation is known as
1. A.winnowing
2. B.milling
3. C.shelling
4. D.threshing
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Answer: A winnowing
29.
The diagram above illustrates a method of compost making. Study it and answer the question. A material that could be used as starter in the method of compost making illustrated is
1. A.Ash
2. B.Straw
3. C.Blood
4. D.Urine
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Answer: D Urine
30.
The diagram above illustrates a method of compost making. Study it and answer the question. The method of compost milking illustrated in the diagram is
1. A.heap
2. B.bin
3. C.sheet
4. D.pit
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Answer: D pit
31.
The diagram above illustrates a method of compost making. Study it and answer the question. The part labelled I is used for
1. A.checking the decomposition rate
2. B.hastening the fermentation rate
3. C.turning the compost materials
4. D.stacking the compost materials
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Answer: C turning the compost materials
32.
The diagram above illustrates a reproductive process in a farm animal. Study it and answer the question. The parts which protect the foetus from mechanical injury are labelled
1. A.I and III
2. B.I and II
3. C.III and IV
4. D.II and III
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Answer: B I and II
33.
The diagram above illustrates a reproductive process in a farm animal. Study it and answer the question. The reproductive process illustrated by the diagram is
1. A.lactation
2. B.gestation
3. C.ovulation
4. D.heat
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Answer: B gestation
34.
The diagram below illustrates a reproductive process in a farm animal. Study it and answer the question. The foetus obtains dissolved oxygen and nutrients from the dam through the parts labelled
1. A.I and II
2. B.II and III
3. C.I and III
4. D.III and IV
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Answer: D III and IV
35.
The diagrams below illustrate different sources of farm power. Study them and answer the question. The machinery illustrated in diagram III could be used to power I. planters II. dryers III. sprayers
1. A.II and III only
2. B.I and III only
3. C.I and II only
4. D.I, II and III
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Answer: D I, II and III
36.
The diagrams below illustrate different sources of farm power. Study them and answer the question. Which of the illustrated sources of farm power decrease in efficiency due to constant use?
1. A.II and III only
2. B.I and III only
3. C.I and II only
4. D.I, II and III
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Answer: D I, II and III
37.
The diagrams below illustrate different sources of farm power. Study them and answer the question. Which of the illustrated sources of farm power is the cheapest
1. A.II
2. B.III
3. C.IV
4. D.I
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Answer: D I
38.
The farming system generally recommended for farm settlement scheme is
1. A.pastoral farming
2. B.mixed cropping
3. C.continuous cropping
4. D.mixed farming
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Answer: D mixed farming
39.
The number of teats in the udder of a cow is
1. A.four
2. B.two
3. C.six
4. D.eight
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Answer: A four
40.
The part of a disc plough to which discs are connected is
1. A.furrow wheel
2. B.standard
3. C.scraper
4. D.beam
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Answer: B standard
41.
The reduction of three seedlings of maize to two plants per stand is referred to as
1. A.rogueing
2. B.thinning
3. C.weeding
4. D.pruning
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Answer: B thinning
42.
The risk of production in agricultural business is borne by the
1. A.farm owner
2. B.farm labour
3. C.farm assistant
4. D.farmer's family
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Answer: A farm owner
43.
The storage structure usually installed by the government for bulk storage of grains in West Africa is
1. A.crib
2. B.rhombus
3. C.bin
4. D.silo
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Answer: D silo
44.
Which of the following combinations of NPK fertilizer is recommended for the cultivation of yam and cassava?
1. A.10:10:10
2. B.20:10:10
3. C.10:10:20
4. D.20:20:10
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Answer: B 20:10:10
45.
Which of the following crops require a nursery?
1. A.Rubber
2. B.Cotton seed
3. C.Yam
4. D.Soya bean
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Answer: A Rubber
46.
Which of the following pairs of livestock diseases could be contracted through inhalation?
1. A.Coccidiosis and rinderpest
2. B.Newcastle disease and aspergillosis
3. C.Anthrax and tuberculosis
4. D.Gumboro and brucellosis
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Answer: B Newcastle disease and aspergillosis
47.
Which of the following paring enterprise could best be combined with fish farming for mutual benefits? I. Vegetable production II. Beekeeping III. Poultry production
1. A.I and III only
2. B.I, II and III
3. C.I and II only
4. D.II and III only
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Answer: A I and III only
48.
Which of the following products is not a primary forest product?
1. A.Plup
2. B.Fuelwood
3. C.Timber
4. D.Mushroom
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Answer: A Plup
49.
Which of the following statements about underground drainage is true
1. A.Ditches are constructed to remove excess water
2. B.Ditches are dug from a source of water to the farmland
3. C.Furrows are constructed to direct water out of the farmland
4. D.Water seeps into tiles to reach an outlet where it is discharged
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Answer: D Water seeps into tiles to reach an outlet where it is discharged

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Cost Price (N)	Useful Life (Life)	Salvage value (N)	Annual depreciation (N)	Total depreciation
20000	Y	5000	1000 annum	15000
60000	10	18000	4200 annum	Z

Cost Price (N)	Useful life (Years)	Salvage value (N)	Annual depreciation (N)	Total depreciation
20000	Y	5000	1000 annum	15000
60000	10	18000	4200 annum	Z