Home ยป Past Questions ยป Agricultural-science ยป Waec ยป 1990 ยป Page 2
22

Dissolved oxygen in fish ponds is maintained at normal level in order to

  • A. accelerate decay of plant materials
  • B. prevent disease attacks
  • C. prevent acquatic plants from competing with fish
  • D. keep fish activities normal
  • E. improve the quality of fish
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23

Which of the following livestock diseases is transmitted by ticks?

  • A. red water
  • B. coccidiosis
  • C. aspergillosis
  • D. trypanosomiasis
  • E. brucellosis
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24

The following are all leguminous forage crops except

  • A. centrosema pubescens
  • B. vigna sinensis
  • C. stylodsnyhrd htsvilid
  • D. panicum maximum
  • E. pueraria phaseoloides
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25

Which of the following is not a source of minerals in animal nutrition?

  • A. green pastures
  • B. fish meal
  • C. blood meal
  • D. cereal
  • E. palm oil
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26

The breed of goat noted for its production of high quality morocco leather is the

  • A. west african dwarf
  • B. kano brown
  • C. ouda
  • D. bornu red
  • E. sokoto red
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27

A fish pond in an enclosed body of water is for

  • A. rearing fish for consumption
  • B. rearing aquatic organisms for feeding fish
  • C. storing fish and other organisms
  • D. keeping ornamental fish and aquatic plants
  • E. rearing fish and other aquatic mammals
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28

The parts of the body affected by Newcastle disease of poultry are the

  • A. digestive and circulatory systems
  • B. reproductive and excretory tracts
  • C. nervous system and respiratory tract
  • D. air-sac and the comb
  • E. comb and the legs
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29

Which of the following is not a reason why planting a mixture of grass and legume on a pasture is economical to the farmer? The

  • A. mixture can harbour pests
  • B. mixture helps in preventing soil erosion
  • C. farmer will save on fertilizer
  • D. mixture provides a balanced feed for livestock
  • E. mixture increases the rate of productyion of livestock
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30

The type of feed which contains the essential nutrients in the right concentrations and proportions is known as

  • A. growers mash
  • B. weaners diet
  • C. creep feed
  • D. concentrate
  • E. balance diet
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31

A castrated male fowl is known as

  • A. cock
  • B. capon
  • C. cockerel
  • D. hen
  • E. broiler
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32

The destructive effects of variegated grasshoppers are conspicuously observed on

  • A. cassava and yam crops
  • B. cocoa and citrus crops
  • C. cowpea and maize crops
  • D. maize and cassava crops
  • E. citrus and weeds
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33

Taungya farm involves the combination of

  • A. crop and animal husbandary
  • B. crop husbandary and forestry
  • C. forestry and animal husbandary
  • D. crop husbandary and fish farming
  • E. forestry and fishing farming
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34

Soil may be exposed to erosion when a pasture is

  • A. undergrazed
  • B. overgrazed
  • C. paddocked
  • D. weeded
  • E. fanced
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35

Maize grows best on

  • A. sandy soil
  • B. sandy-clay soil
  • C. clayey-loam soil
  • D. loamy soil
  • E. silty-clay soil
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36

Pests of crops that feed by piercing and sucking plants include the following except

  • A. stem borers
  • B. aphids
  • C. cocoa mirids
  • D. cotton stainers
  • E. cassava mealy bugs
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37

The mosaic symptom commonly associated with viral diseases of crops can be best observed on

  • A. roots
  • B. stem
  • C. leaves
  • D. fruits
  • E. flower
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38

Which of the following groups comprises only oil crops?

  • A. groundnut, jute and cotton
  • B. melon, coconut and sisal hemp
  • C. coconut, cotton and sunflower
  • D. sunflower, rubber and jute
  • E. oil palm, sunflower and jute
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39

The pest designated as a national pest by the Nigeria Agricultural Advisory Council is

  • A. variegated grasshopper
  • B. thrips
  • C. capsid
  • D. cricket
  • E. weevil
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40

The following are forestry crops except

  • A. tectona grandis
  • B. gmelina arborea
  • C. anarcadium
  • D. pinus eliotis
  • E. chlorophora excelsa
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41

The most common weed of pastures in Nigeria is

  • A. spear grass
  • B. goat weed
  • C. water leaf
  • D. tridax
  • E. sida
View Answer & Discuss WAEC 1990
42

If the seed rate for guinea corn is 5.6 kg per hectare, what will be the amount of seeds required for planting 35 acre farm?

  • A. 75.1
  • B. 78.4
  • C. 568.2
  • D. 784.5
  • E. 960.3
View Answer & Discuss WAEC 1990