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AGRICULTURAL SCIENCE (Objective Questions And Answers)


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THEORY QUESTIONS
WAEC SYLLABUS

WASSCE 2009

Objectives



​1. The most important contribution of agriculture to mankind is the provision of

A. shelter

B. employment

C. foreign exchange

D. food.


2. An advantage of commercial agriculture is that it

A. requires small space

B. requires small space

C. produces high returns

D. involves low capital.


3. Which of the following statements about communal land tenure system is true?

A. it gives the owner complete freedom on the land

B. the land can be used as collateral for agricultural loans

C. the land can be shared by the owner’s children

D. mechanized agriculture


4. Agricultural land use is negatively affected by

A. type of soil

B. climatic factors

C. increase in population

D. increase in soil micro organisms


5. The practice of growing both food and forage crops simultaneously on the same piece of land is called

A. pastoral farming

B. ley farming

C. crop rotation

D. continuous cropping


ANSWERS

6. The use of land for agricultural purpose involves the following except

A. livestock grazing

B. fish farming

C. road construction

D. crop production


7. The natural grasslands of West Africa are generally located in the

A. rain forest

B. guinea savannah

C. mangroves

D. equatorial belts


8. The following processes in soil formation are caused by biotic factors except

A. bacterial decomposition of plants

B. soil mixing and turning by earthworms

C. burrowing of rodents

D. soil disintegration by dehydration


9. Which of the following rocks is not formed from pre-existing rocks?

A. Limestone

B. Granite

C. Shale

D. Marble


10. Chemical weathering is fastest in

A. cool weather

B. hot weather

C. high altitudes

D. low altitudes


ANSWERS

11. It is not advisable to apply fresh farmyard manure because

A. its heat of decomposition scorching of plants

B. some micro organisms in the manure may die

C. the manure may increase soil acidity

D. the manure may increase soil alkalinity


12. Magnesium deficiency in crops can be corrected by the application of

A. dolomite

B. limestone

C. quicklime

D. urea


13. The atmosphere gains carbon dioxide through the following ways except

A. Burning of fuel such as coal and wood

B. respiration by plants and animals

C. photosynthesis in plants

D. death and decay in plants and animals


14. Controlled burning has the advantage of

A. increasing the number of soil organisms

B. inducing re-growth of pasture grasses

C. increasing the amount of nutrients in the soil

D. improving soil structure


15. Which of the following fertilizers should be applied for good plant growth after prolonged use of sulphate of ammonia in a neutral soil?

A. Ammonium nitrate

B. Lime

C. Urea

D. Single super phosphate


ANSWERS

16. Which of the following statements indicate advantages of sub-surface irrigation? I. Low operating cost once established II. Does not disturb the movement of implements III. Permits efficient use of water IV. Easily floods the field

A. I, II and III only

B. II, III and IV only

C. I, III and IV only

D. I,II III and IV


17. The removal of excess water from the sub- soil is known as

A. irrigation

B. drainage

C. evaporation

D. dehydration


18. The best source of farm power for agricultural production id

A. human power

B. animal power

C. mechanical power

D. solar power


19. The greatest disadvantage of using a bulldozer in land clearing is that it

A. removes the fertile top soil along with the vegetation

B. makes the soil lose its texture


D. increases the incidence of pest


20. Mechanization is difficult to practice where the

A. land is fragmented

B. farmer is wealthy

C. farm holding is large

D. soil fertility is low


ANSWERS

21. Which of the following equipment is not used in farm surveying?

A. Gunter’s chain

B. Measuring tape

C. Ranging pole

D. Pick Axe


22. Farm surveying is important because it determines the

A. soil fertility

B. size of farmland

C. yield of crops

D. types of implements to use


23. Bush fallowing is necessitated by

A. population increase

B. reduction in soil fertility

C. cost consideration

D. rural- urban migration


24. A well fermented and dried coffee seed is said to be

A. parched

B. graded

C. winnowed

D. threshed


25. A bag of fertilizer had a ratio of 0:10:0 written on it. This means that the fertilizer contains

A. 0 kg of nitrogen,10 kg of potash and 0 kg of phosphate

B. 0 kg of phosphate, 10 kg of nitrogen and 0kg of potash

C. 0 kg of nitrogen, 10 kg of phosphate and 0 kg of potash

D. 0 kg of potash, 10 kg of potash and 0 kg of nitrogen


ANSWERS

26. In crop rotation, deep- rooted crops should follow shallow rooted crops because deep rooted crops

A. are resistant to diseases

B. are early maturing

C. feed from different soil layers

D. attract different kinds of pests


27. If a crop is planted at a spacing of 100cm× 50cm, calculate the plant population required for an hectare of farmland.

A. 200

B. 2,000

C. 5,000

D. 20,000


28. The term hermetic storage of grains means keeping grains in

A. air- tight containers

B. jute bags

C. silos

D. rhombus


29. A disadvantage of vegetatively propagated crops is that they

A. do not mature on time

B. are less resistant to diseases

C. do not withstand harsh conditions

D. lodge very readily


30. Which of the following statement s about mulches is true? They

A. include appear and polythene sheets

B. encourage weed growth

C. facilitate hardpan formation

D. decrease soil biotic population


ANSWERS

31. Which of the following crops is best harvested using a combine harvester?

A. Maize

B. Groundnut

C. Cassava

D. Cotton


32. Which of the following crops produces latex?

A. Mango

B. Citrus

C. Rubber

D. Sisal


33. What will be the effect of establishing a grass with centrosemaspp in a pasture? The

A. grass will be suppressed

B. total yield of herbage will be decreased

C. pest of centrosema will destroy the grass

D. forage yield will be high


34. Which of the following is not an economic importance of forest? They serve as a source of

A. medicinal plants

B. game animals

C. edible wild fruits

D. domestic animals


35. The twisting, wrinkling and mottling of leaves are symptoms of

A. nematode attack

B. viral diseases

C. water deprivation

D. fungal attack


ANSWERS

36. An example of biological control of pest is

A. using lady bird beetles to feed on cytoplasm

B. early planting of maize

C. harvesting maize when properly dried

D. soaking bean seeds in Bordeaux mixture


37. Edible seeds with sticky covering and hooks are most likely to be dispersed by

A. wind

B. water

C. animal

D. explosion


38. Hereditary characteristics are passed from parents to offspring through the

A. cytoplasm

B. placenta

C. gene

D. umbilical cord


39. Embryonic membranes do not include

A. uterus

B. chorion

C. allantois

D. amnion


40. The digestion of plant fibre in non-ruminant herbivores takes place in the

A. mouth and rectum

B. caecum and colon

C. oesophagus and duodenum

D. stomach and rectum


ANSWERS

41. Which of the following hormone sis responsible for the relaxation of the of the pelvic ligaments and cervix during parturition?

A. Testosterone

B. Progesterone

C. Oxytocin

D. Relaxin


42. The signs of heat include the following except

A. red and swollen vulva

B. restlessness and nervousness

C. attempting to mount other animals

D. increased appetite


43. Which of the following is not an abiotic condition that affects livestock production?

A. Sunlight

B. Rainfall

C. Temperature

D. Predators


44. Cows should not be allowed to eat plenty of young fresh pasture because they will

A. develop anthrax

B develop bloat

C. refuse to eat concentrate

D. become infested with worms


45. In commercial egg production, the most effective management system is

A. deep litter

B. free range

C. battery

D. fold


ANSWERS

46. Which of the following statements is true of a pig which has only one fold?

A. It will be sterile

B. It can still produce viable stem

C. All the spermatozoa will be dead

D. It will not be able to mate a sow


47. The ingredients which is not a major source of minerals in animal feeds is

A. oyster shell

B. fish meal

C. bone meal

D. palm kernel meal


48. If a soya bean meal contains 45% crude protein, what quantity of it should be provided to laying flock to supply 5.00 kg of protein?

A. 11.11 kg

B. 9.09 kg

C. 2.75kg

D. 2.25 kg


49. The following are common grasses in the rangeland except

A. Panicum maximum

B. Calopogonium mucunoides

C. Cynodon dactylon

D. Imperata cylindrical


50. Diseases of animals that can also be transferred to humans are

A. nutritional

B. physiological

C. zoonotic

D. parasitic


ANSWERS

51. Poultry showing difficulty in breathing and loss of appetite are under the attack of

A. coccidiosis

B. aspergillosis

C. foot and mouth disease

D. brucellosis


52. The major cause of spoilage in fresh fish is

A. high humidity

B. fungal attack

C. low moisture content

D. bacterial attack


53. Which of the following statements about a good fish pond is true?

A. It must have low pH.

B. The water must be turbid

C. It must have low concentration of dissolved salts

D. The level of dissolved oxygen must be low


54. The mechanical introduction of a sperm into the vagina of a female animal is termed

A. back-crossing

B. pen mating

C. artificial insemination

D. inbreeding


55. The most important input contributed by the farm family is

A. money

B. implements

C. labour

D. fertilizer


ANSWERS

56. Demand is said to be elastic when a percentage change in price

A. results in an infinite change in demand

B. results in an increase in quantity demanded

C. results in an exact change in demand

D. is less than one


57. The law of diminishing returns helps in

A. determining the proportion of production factors to combine

B. determining the qualities of fixed resources to use in production

C. indicating economic wages to pay farm workers

D. indicating the quantity of fixed factors to employ


58. How would an individual proposing to start a farm obtain estimates of yield, prices and cost needed in preparing a budget?

A. From his past experience

B. By trial and error

C. From agricultural officers or local farmers

D. From books written about overseas farms


59. Farm gate price is the price at which

A. produce are sold to the government

B. produce are sold in the market

C. producers sell to the middlemen

D. marketing boards sell to the consumers


60. The methods of disseminating new farming techniques to farmers include the following except

A. result demonstration

B. use of radio

C. use of television

D. organizing symposia.



WASSCE JUNE 2009 AGRICULTURAL SCIENCE

OBJECTIVE TEST ANSWERS

​1.D 2.C 3.A 4.A. 5.B 6.C 7.B 8.D 9.B 10.A

11.A 12.A 13.C 14.B 15.B 16.B 17.B 18.A 19.A 20.A

21.D 22.B 23.B 24.B 25.C 26.C 27.D 28.A 29.C 30.A

31.A 32.C 33.D 34.D 35.B 36.A 37.C 38.C 39.A 40.B

41.C 42.D 43.D 44.B 45.C 46.B 47.D 48.D 49.B 50.D

51.B 52.D 53.C 54.C 55.C 56.B 57.B 58.C 59.C 60.A


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