Agricultural Science JAMB, WAEC, NECO AND NABTEB Official Past Questions

1

(a) State a breed of specimen L which may be used for only commercial egg production.

(b) How long does it take an improved specimen L from day old to reach its point of lay

(c) Name any four features on the head of specimen Lour diseases that attack specimen L.

(d) Mention three parasites and four diseases that attack specimen L

(e) Mention two ways of controlling the parasites mentioned in (d) above

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2

Observe specimens H, l, J, and K carefully.

(a) State one method of propagation of each of the specimens 

(b) State four advantages of staking the crop which specimen I is obtained.

(c) Name the toxic substance present in specimen H and give two methods of reducing it

(d) Describe the processing of specimen H into garri.

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3

Study the diagrams below and use them to answer questions (a) to (c).

Open Photo

a) ldentify the equipment illustrated by diagrams D, E, F, and G.

(b) State the farm operation for which the equipment illustrated by diagrams D,E,F and G.

(c) Enumerate two specific uses of each of the equipment illustrated by diagrams F and G.

(d) State six general ways of maintaining the equipment illustrated by diagrams F and G.

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4

Study carefully the experimental set-ups labelled A, B and C. 

(a) What is the aim of the experiment for which the apparatus has been set up?

(b) List the experimental set-ups in the order in which water has risen through the soil samples, starting with the highest 

(c) List six items of apparatus used in the experimental set-up.

(d) Describe briefly the procedure used in setting up the experiment.

(e) Why is there a difference in the water levels of the soil samples in the set ups labelled B and C?

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5

 (a) List the three main extension teaching methods. (b) For each method listed in 10(a), state three types. (c) Give four qualities of a good extension agent.

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6

(a)(i) Explain the law of diminishing returns. (ii) State how the law of diminishing returns affect agricultural production.

(b) Discuss how each of the following factors affect the supply of agricultural produce: (i) price (ii) technology (iii) weather (iv) subsidy (v) government policy.

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7

Discuss the effects of temperature on: (a) brooding of chicks; (b) reproduction in livestock; (c) milk production; (d) egg production.

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8

(a) Explain four of the following management practices in animal production: (i) steaming up; (ii) culling; (iii) candling; (iv) tattooing; (vi) creep feeding. (b) List five signs of heat in animals. (c) Mention three reasons for castrating farm animals

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9

(a) Define pasture.

(b) List three features of natural pastures.

(c) A piece of land to be used to establish a pasture of Stylosanthes gracilis was surveyed to be circular.

(i) If the radius of the land is 200m and the spacing of the pasture legume is lm by 50cm, what is the population of the legume at one seed per stand?

(ii) If the germination percentage is 75, calculate the expected plant population. (iii) Give two ways in which Stylosanthes gracilis is important in agricultural production.

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10

(a) Explain the following terms as used in crop production: (i) floriculture; (ii) taungya farming; (iii) ley farming. (b) State eight uses of ornamental plants to man. (c) Mention four fibre crops grown in your country.

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11

 (a) Enumerate four economic importance of rocks: (i) to man; (ii) in agriculture. (b) State two characteristics of each of the following (1) igneous rock (ii) metamorphic rock. (c) Describe the mode of formation of sedimentary rocks.

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12

(a) State three ways by which nitrogen is added to soil in the Nitrogen cycle.

(b) List five ways by which nitrogen is lost from the soil.

(c) State the importance of the Nitrogen cycle.

(d) Explain three processes leading to the formation of nitrate from organic matter in the Nitrogen cycle.

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13

(a) Explain the following terms: (i) primary tillage implement; (ii) secondary tillage implement.

(b) (i) State three reasons why disc ploughs are better suited for soils in West Africa than the mouldboard ploughs. (ii) List six major parts of a disc plough.

(c) Give three reasons why secondary tillage is necessary before sowing of seeds. (d) State three precautions a farmer should take when spraying chemicals

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14

. (a) Give eight characteristics of agricultural systems in West Africa. (b) Explain four ways in which land tenure systems affect agricultural production in your country.

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15

Agricultural education programmes for rural youth will reduce the

  • A. rate of adoption of innovations
  • B. population of youth in rural areas
  • C. age at which youth will venture into family life
  • D. dependncy of youth on parents
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16

Which of the following statements is not true about profit and loss account of a farm?

  • A. it is prepared at the end of business period usually a year
  • B. all expenses and purchases are listed on the right-hand side
  • C. all expenses and purchases are listed on the left-hand side
  • D. all receipts and sales are listed on the right-hand side
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17

Agricultural credits should be put to the following uses except

  • A. purchase of inputs
  • B. meeting family needs
  • C. improvement of structures
  • D. adoption of innovations
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18

The demand for agricultural produce is generally

  • A. elastic
  • B. inelastic
  • C. unitary
  • D. static
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19

A farmer sold all his harvested maize totaling 260 kg at N5.50 per kg, thereby making a profit of N430.00. Determine the percentage profit per kg of maize sold.

  • A. 35%
  • B. 40%
  • C. 43%
  • D. 52%
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20

A farmer sold all his harvested maize totaling 260 kg at N5.50 per kg, thereby making a profit of N430.00. Calculate the production cost of maize per kg.

  • A. N4.05
  • B. N3.85
  • C. N3.75
  • D. N3.65
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21

Fertilizing a fish pond with compost manure would most likely

  • A. decrease phytoplankton population and decrease fish yield
  • B. decrease phytoplankton population and increase fish yield
  • C. increase phytoplankton population and decrease fish yield
  • D. increase phytoplankton and increase fish yield
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