1989 - WAEC Agriculture Past Questions and Answers - page 4
31
Why should a seed-producing farmer spray an insecticide on his crops only when the bees are not around?
A
the bees would sting him and he therefore avoids them
B
the farmer does not want to waste his chemicals
C
bees are important for pollination of his crops
D
bees produce honey for him in his farm
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32
The average seed rate for maize is 25 kg per hectare. Allowing for a seed wastage of 5 per cent.How many kilogram of seeds would be required in planting 10 hectares of farmland?
A
237.5
B
238.0
C
250.0
D
255.0
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33
Thrips cause serious mechanical damages to crops by their
A
feeding activities on flowers, leaves and fruits
B
laying eggs on plants
C
sucking of the sap of crops
D
burrowing activities causing damping off in crops
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34
The expression of a gene in the phenotype irrespective of whether the cell is homozygous or heterozygous is known as
A
recessive
B
partial dominance
C
test-cross
D
segregation
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35
Vegetables propagation can be carried out through the following processes except
A
seedling
B
cutting
C
layering
D
grafting
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36
Contact insecticides are used to control
A
pod borers of legumes
B
stem borers of cereal
C
leaf beetles of legumes
D
peel worm of legumes
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37
The part of the ruminant stomach from which digestive juices secreted is the
A
rumen
B
reticulum
C
omasum
D
paunch
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38
At which of the following ages are gilts normally mated?
A
8 - 12 months
B
14 - 15 months
C
15 - 20 months
D
21 - 24 months
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39
Which of the following breeds of cattle is regarded as the best dairy breed in Nigeria?
A
red bororo
B
keteku
C
sokoto gudali
D
muturu
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40
The symptoms of vitamin deficiency diseases in livestock includes the following
A
scurvy
B
loss of appetite
C
poor blood clotting
D
improved fertility
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