WAEC - Agricultural Science (2002)

• 1

  Subsistence agriculture mainly involves

  回答

  (C)

  food production using family labour
• 2

  The major export crops produced in the West African sub-region include

  回答

  (C)

  cocoa,rubber,groundnut and cotton
• 3

  A major problem of grains storage in the rain forest zone of West Africa is high

  回答

  (D)

  humidity
• 4

  When the government provides subsidies in agriculture,

  回答

  (A)

  farm inputs are made available to farmers at reduced prices
• 5

  Most agricultural policies do not benefit rural communities because

  回答

  (D)

  they are formulated by non-practising farmers
• 6

  Plant quarantine regulations are enforced to

  回答

  (A)

  prevent the intoduction of foreign pests and diseases
• 7

  The primary purpose of establishing wildlife reserve is to

  回答

  (B)

  prevent extinction of wild animals
• 8

  The most important factor that limits agricultural production in West Africa is

  回答

  (C)

  rainfall
• 9

  An acidic soil can be neutralized by the addition of

  回答

  (C)

  wood ash
• 10

  Capillarity is highest in

  回答

  (D)

  clay
• 11

  Which of the following describes the effects of excessive nitrogen application on the growth of maize plants?

  回答

  (A)

  high vegetative growth with low yield
• 12

  Nitrogen is taken up by plant roots in the form of

  回答

  (A)

  nitrate ion
• 13

  In the process of recycling carbon in nature, carbondioxide is used by crops during

  回答

  (C)

  photosynthesis
• 14

  Which of the following is not an effect of water-logging on crop production? it

  回答

  (D)

  causes plant roots to wilt
• 15

  When soils are poorly drained,

  回答

  (C)

  the air content of the soil is reduced
• 16

  Which of the following sources of water is least useful for irrigation purposes?

  回答

  (A)

  sea
• 17

  Which of the following sources of farm power is most flexible and adaptable to farm operations?

  回答

  (C)

  human power
• 18

  Which of the following sources of power supply to the farm is most unreliable?

  回答

  (A)

  wind
• 19

  Animal power is usually used on the farm for

  回答

  (C)

  ploughing
• 20

  The most appropriate farm implement for breaking up soil clod is the

  回答

  (B)

  plough
• 21

  The daily maintenance practice carried out on a disc harrow is

  回答

  (B)

  cleaning the soil off the disc
• 22

  Which of the following is an advantage of mechanization?

  回答

  (A)

  carrying out many farm operations with ease
• 23

  Sexual propagation involves the use of

  回答

  (B)

  seeds
• 24

  The process of inducing root development on portions of stems still attached to the parent plant is known as

  回答

  (C)

  layering
• 25

  Which of the following crops requires shade in the early stages of its growth in the field?

  回答

  (D)

  cocoa
• 26

  Which of the following groups of crops is widely frown in areas with high rainfall?

  回答

  (A)

  cocoa,oilpalm,rubber and kola
• 27

  An important forage crop in West Africa is

  回答

  (C)

  giant star grass
• 28

  The most important reason for encouraging afforestation in the arid regions of West Africa is to

  回答

  (D)

  serve as wind break
• 29

  The growing of both forest trees and arable crops simultaneously on the same piece of land is termed

  回答

  (D)

  taungya system
• 30

  Which of the following plant diseases is not caused by fungi?

  回答

  (B)

  maize streak
• 31

  mosaic disease affects

  回答

  (C)

  cassava and tobacco
• 32

  The following are biting and chewing insects except

  回答

  (D)

  moths
• 33

  Mealy bug is a major pest of

  回答

  (B)

  cassava
• 34

  Weeds which produce light and numerous seeds are normally dispersed by

  回答

  (A)

  wind
• 35

  Which of the following effects is not a consequence of 'introduction' in crop improvement? Introduced crops

  回答

  (D)

  hamper the growth of local varieties
• 36

  In which part of the alimentary canal of poultry is grit mostly found?

  回答

  (C)

  gizzard
• 37

  Parturition in farm animals marks the end of

  回答

  (D)

  gestation
• 38

  A sow is normally expected to farrow

  回答

  (C)

  twice a year
• 39

  High temperatures on livestock induces the following effects except

  回答

  (A)

  high feed intake
• 40

  Rabbits are kept in cages called

  回答

  (B)

  hutches
• 41

  Farm animals are identified by the following methods except

  回答

  (C)

  shearing
• 42

  Which of the following is not a characteristic of pigs?

  回答

  (D)

  unlimited ability to digest fibre
• 43

  Dried cassava should not exceed 50% of the total ration of pigs because

  回答

  (A)

  too much cassava in diets will lead to excessive fat deposit
• 44

  The sugar is most commonly found in the blood of animals is

  回答

  (A)

  glucose
• 45

  Foot and mouth disease is caused by a

  回答

  (B)

  virus
• 46

  Which of the following symptoms indicate anthrax disease?

  回答

  (B)

  sudden death without any visible sign of sickness
• 47

  Which of the following practices may cause fish diseases in a pond?

  回答

  (C)

  poor management
• 48

  Selection and hybridization are all methods of animal

  回答

  (D)

  improvement
• 49

  The system of breeding that is practiced when N'dama cows are mated by muturu bulls is

  回答

  (C)

  cross breeding
• 50

  In a crop production enterprise, a fixed factor of production could be the

  回答

  (A)

  size of the land
• 51

  On a curve for the law of diminishing returns, maximum output is obtained at the

  回答

  (C)

  apex of the curve
• 52

  Farmers often find it difficult to obtain loans from banks for agricultural projects because they

  回答

  (C)

  have no collateral security
• 53

  Farm accounts help the farmer to

  回答

  (A)

  manage the farm as a business
• 54

  A maize farmer obtains a loan of N120,000.00 at an interest rate of 9% to be repaid in one year.Calculate the interest to be paid on the loan.

  回答

  (A)

  N10,800.00
• 55

  Agricultural extension programme

  回答

  (A)

  promotes practical application of useful agricultural information