WAEC - Agricultural Science (2020)

• 1

  A nation exports agricultural produce mainly to?

  回答

  (C)

  earn foreign exchange
• 2

  Quarantine measures in agriculture are aimed at?

  回答

  (B)

  preventing the introduction of pests and diseases
• 3

  Which of the following statement is not true about farming in West Africa?

  回答

  (D)

  mechanisation is fully adopted
• 4

  Mechanical power is not usually required in?

  回答

  (C)

  staking of yams
• 5

  

  The illustrated equipment is called?

  回答

  (D)

  ranging pole
• 6

  

  The illustrated equipment is used for?

  回答

  (A)

  making drills
• 7

  

  Calculate the area of the farmland.

  回答

  (B)

  0.36ha
• 8

  The major objective of farm planning is to?

  回答

  (A)

  maximize the use of available resources
• 9

  Which factor of production has the following characteristics?

  I.Free gift of nature
  II.Limited in supply
  III.Immobile

  回答

  (A)

  land
• 10

  Igneous rocks can easily be identified through their?

  回答

  (B)

  coarse texture
• 11

  Water which rises above the water table in the soil and is held in fine medium pores between soil particles by surface tension is?

  回答

  (C)

  capillary water
• 12

  An oven dried soil sample of mass 8g had a mass of 1.6g after it was completely burnt. Determine the percentage of humus in the soil sample.

  回答

  (D)

  80%
• 13

  The deficiency of nitrogen in a maize plant can be corrected by applying?

  回答

  (C)

  sulphate of ammonia
• 14

  The structure of sandy soils can be described as?

  回答

  (C)

  single-grained
• 15

  

  The cropping system illustrated in the table is?

  回答

  (B)

  crop rotation
• 16

  

  Which of the following crops can conveniently replace maize in the table?

  回答

  (D)

  millet
• 17

  The following bacteria are important in the nitrogen cycle except?

  回答

  (D)

  rhizobium
• 18

  Determine the ratio of nutrients in NPK 5-10-15.

  回答

  (B)

  1:2:3
• 19

  Which of the following methods of irrigation is most efficient in terms of water conservation?

  回答

  (D)

  drip irrigation
• 20

  Which of the following crops is dicotyledonous?

  回答

  (D)

  vigna unguiculata
• 21

  Crops which grow and mature within few weeks of their cultivation are called?

  回答

  (B)

  ephemeral crops
• 22

  If the yield of cowpea is 750kg per hectare, calculate the yield of cowpea from a 20 hectare farm.

  回答

  (B)

  15,000kg
• 23

  Which of the following statements about threshing of rice are true?

  I.Rice grains are separated from the panicle
  II.Breakage of some grains could occur
  III.The grains are polished

  回答

  (D)

  I, II and III
• 24

  An important reason for staking yam is to?

  回答

  (A)

  expose the leaves to sunlight
• 25

  A crop that can be propagated by stem cutting is?

  回答

  (C)

  cassava
• 26

  Which of the following diseases of tomato is caused by nematode?

  回答

  (A)

  fusarium wilt
• 27

  The yield of cocoa trees is not influenced by?

  回答

  (C)

  method of harvesting
• 28

  The following crops are fiber crops except?

  回答

  (B)

  onion
• 29

  The fencing and partitioning of a pastureland into paddocks is meant to?

  回答

  (B)

  control grazing and ensure regeneration of pasture
• 30

  When a gene is expressed in the phenotype in a homoxygous or heterogous form, that gene is said to be?

  回答

  (C)

  regeneration
• 31

  Uncontrolled burning of forests encourages?

  回答

  (A)

  deforestation
• 32

  Which of the following tree species is suitable for making electric poles?

  回答

  (D)

  teak
• 33

  A pest that attacks stored maize grain is?

  回答

  (B)

  rodent
• 34

  An agricultural system which combines crop production with forest establishment is known as?

  回答

  (B)

  taungya farming
• 35

  An important characteristic of pigs is that they are?

  回答

  (A)

  highly prolific
• 36

  Digestion in ruminants is mainly?

  回答

  (D)

  microbial and enzymatic
• 37

  If 30 eggs make up a crate of eggs, how many eggs are in 2 packs assuming a pack contains 10 crates of eggs?

  回答

  (D)

  600 eggs
• 38

  In a brooder house, which of the following factors is monitored with the use of wet and dry hygrometer?

  回答

  (C)

  relative humidity
• 39

  Which of the following statements is not a reason for feeding farm animals?

  回答

  (C)

  production of inorganic manure
• 40

  Rickets in farm animals can be controlled by?

  回答

  (D)

  adding fish meal and oyster shell to animal feed
• 41

  The methods of rangeland improvement which ensure continuous herbage growth during the dry season are?

  回答

  (C)

  fertiliser application and irrigation
• 42

  Tapeworm, liver fluke and roundworm can be controlled by?

  回答

  (B)

  drenching
• 43

  

  The part which a bait is attached before lowering the tool in water is labelled?

  回答

  (D)

  I
• 44

  

  Which of the labelled parts enables the tool to float on water when fish is caught?

  回答

  (A)

  IV
• 45

  Which of the following statements is not a precaution measure in bee keeping?

  回答

  (A)

  the apiary should not be fenced to allow for proper ventilation