JAMB Agricultural Science 2015 past questions
Ten questions from the 2015 JAMB Agricultural Science paper, with answers and explanations. We hold 47 questions from this paper, and the Skolra app has all of them.
JAMB Agricultural Science 2015 questions and answers
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1.The instrument which enables a surveyor to find the direction of a base line is
- ATheodolite
- BClinometer
- CDumpy level
- DCompassCorrect
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Answer: D
A compass is the instrument used to find the direction of a base line in surveying. It indicates magnetic north and allows surveyors to establish directional reference for measurements and mapping.
- A
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2.The use of animal traction is limited in the forest zones of West Africa because of the
- AAbundance of water and fertile soils
- BPreference of farmers for hired labor
- CPrevalence of tsetse fly and trypanosomiasisCorrect
- DHigh cost of animal feed
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Answer: C
The use of animal traction is severely limited in forest zones of West Africa due to the prevalence of tsetse fly, which transmits trypanosomiasis (sleeping sickness) to livestock, making them unsuitable for work.
- A
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3.In preparing for parturition of a sow, warmth should be provided to
- ANewborn piglets to prevent hypothermiaCorrect
- BReduce stress on the sow
- CStimulate milk letdown in the sow
- DIncrease feed intake
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Answer: A
Warmth (heat lamps or warm pads) should be provided to newborn piglets to prevent hypothermia. Piglets are born with little hair and cannot regulate body temperature, making warmth essential for survival.
- A
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4.Which of the following statements about agricultural development is true? It leads to I. increased processing of produce II. increased food production III. high productivity IV. increased agricultural labour force
- AAll of I, II, III and IV
- BI, II and III onlyCorrect
- CI, II and IV only
- DII, III and IV only
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Answer: B
Agricultural development leads to increased processing of produce (I), increased food production (II), and high productivity (III). However, it often reduces the agricultural labour force (IV) by replacing manual labor with mechanization, so IV is not always true.
- A
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5.Corms, rhizomes and tubers are examples of
- AFloral modification organs
- BSexual reproduction organs
- CPhotosynthetic leaf adaptations
- DVegetative or asexual reproduction structuresCorrect
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Answer: D
Corms, rhizomes, and tubers are all underground vegetative or asexual propagation structures used by plants to reproduce without seeds. They allow plants to spread and regenerate through fragmentation.
- A
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6.Piglet anaemia can be controlled by using
- AHigher ambient temperature
- BIron supplementation or iron-rich feedsCorrect
- CReduced weaning age
- DIncreased nursing time
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Answer: B
Piglet anemia is caused by iron deficiency and can be controlled through iron supplementation (iron injections or pastes) or iron-rich feeds. Piglets are born with limited iron stores and need supplementation when kept indoors.
- A
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7.A detrimental effect of bush burning is that it
- ADestroys soil microorganisms and reduces soil fertilityCorrect
- BReduces greenhouse gas emissions
- CImproves nutrient availability for crops
- DIncreases water retention in the soil
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Answer: A
Bush burning destroys soil microorganisms, organic matter, and the soil structure, reducing soil fertility and nutrient availability. This is a major detrimental effect that harms long-term soil productivity.
- A
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8.Which of the following properties of soil determines its water-holding capacity? I. Texture II. pH III. Colour IV. Structure
- AI and IV onlyCorrect
- BIII and IV only
- CII and III only
- DI and II only
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Answer: A
Soil texture (I) and soil structure (IV) are the main properties that determine water-holding capacity. Texture determines pore size distribution, and structure affects aggregation and porosity. pH (II) and color (III) have minimal direct effect on water-holding capacity.
- A
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9.Crop rotation decreases the incidence of pests by
- AApplying pesticides in rotation
- BKilling all pest species in the soil
- CIntroducing natural enemies of pests
- DStarving pests by removing their host plantsCorrect
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Answer: D
Crop rotation decreases pest incidence by breaking the pest cycle. When a pest's host plant is not grown in a field, the pest population cannot sustain itself and eventually starves, leading to natural population decline.
- A
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10.A sow that is not producing milk after farrowing should be given
- AReduced feed intake
- BLow protein diet
- CHigh energy feed and extra waterCorrect
- DAntibiotics immediately
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Answer: C
A sow not producing milk after farrowing likely has low energy reserves. She should be given high energy feed and extra water to support milk production and recovery from farrowing stress.
- A
The questions come from past JAMB, WAEC and NECO papers. We use software to help write the answer options and explanations, and every answer is checked twice before it goes on the site. How we check
Spotted a wrong answer? Tell us from the app or on the contact page and we check it.
Practise all 47 questions we hold from the 2015 paper, on a timed CBT screen
Every question has the answer and an explanation, in the Skolra app.