Home ยป Past Questions ยป Agricultural-science ยป Waec ยป 2019 ยป Page 2
22

Which of the following breeds of cattle is exotic?

  • A. Sokoto gudali
  • B. ndama
  • C. friesian
  • D. muturu
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23

During the production of palm oil, the oil palm fruits are boiled in order to?

  • A. harden the kernel
  • B. prevent high level of oil rancidity
  • C. extract oil from the palm fruit
  • D. separate mesocarp from endocarp
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24

Biological control of insect-pests of crops is carried out through?

  • A. crop rotation
  • B. use of predators
  • C. use of pesticides
  • D. farm sanitation
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25

A major storage pest of cereals in West Africa is?

  • A. stem borer
  • B. weevil
  • C. bird
  • D. army worm
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26

The vector of leaf curl disease of cotton is?

  • A. grasshopper
  • B. termites
  • C. thrips
  • D. white fly
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27

Sexual propagation of omamental plants involves the use of?

  • A. stems
  • B. seeds
  • C. suckers
  • D. rhizomes
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28

The growth of both trees and arable crops on the same piece of land is?

  • A. ley farming
  • B. mixed farming
  • C. forestry
  • D. taungya system
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29

Protective functions of forests include the following except

  • A. soil conservation
  • B. serving as windbreak
  • C. purification of air
  • D. source of firewood
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30

If maize seed is sown at a spacing of 100cm x 50cm, determine the expected maize plant population per hectare? 

  • A. 40,000
  • B. 20,000
  • C. 5,000
  • D. 2,000
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31

A planting material used in propagating plaintain is the?

  • A. crown
  • B. peeper
  • C. slip
  • D. leaf
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32

Which of the following statements are advantages of mulching? it I.Controls weeds II.Conserves soil moisture. III.Increases soil temperature. IV.Reduces soil pH.

  • A. I and II
  • B. I and III
  • C. II and IV
  • D. III and IV
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33

Which of the following statements is not a reason for budding? The resulting plants_______

  • A. can withstand adverse climatic conditions
  • B. flower and fruit early
  • C. are more disease resistant
  • D. develop broader leave for photosynthesis
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34

Corns, rhizomes and tubers are examples of?

  • A. underground roots
  • B. underground stems
  • C. aerial stems
  • D. modified leaves
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35

In green manuring, crops are ploughed into the soil just before flowering in order to?

  • A. control soil pathogens
  • B. enrich the soil with nutrients
  • C. control soil erosion
  • D. increase the soil temperature
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36

The growing of only one crop on a piece of land from year to year is known as?

  • A. mixed cropping
  • B. crop rotation
  • C. monoculture
  • D. shifting cultivation
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37

In a crop rotation system, it is usually preferred that cassava comes last in the rotation because it?

  • A. adds nitrogen to the soil
  • B. is a shallow feeder
  • C. is a deep rooted crop
  • D. is a perennial crop
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38

Liquid fertilizers and pesticides could be applied through?

  • A. furrow irrigation
  • B. channel irrigation
  • C. sprinkler irrigation
  • D. flood irrigation
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39

Study and answer this question

The soil horizon that is not supportive of the growth of tree crops is?

  • A. horizonA.
  • B. horizonB
  • C. horizonC
  • D. horizonD
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40

Which of the following mineral elements is essential for chlorophyll formation?

  • A. calcium
  • B. boron
  • C. sodium
  • D. magnesium
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41

A fresh garden soil sample weighed 25kg. When oven-dried, its weight reduced to 20kg. Calculate the percentage moisture content of the soil sample.

  • A. 5.0%
  • B. 12.5%
  • C. 20.0%
  • D. 25.0%
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42

The type of rock formed from accumulation of materials transported by water is called?

  • A. sedimentary rock
  • B. igneous rock
  • C. metamorphic rock
  • D. plutonic rock
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