2002 - WAEC Agriculture Past Questions and Answers - page 2
11
Which of the following describes the effects of excessive nitrogen application on the growth of maize plants?
A
high vegetative growth with low yield
B
high vegetative growth with high yield
C
low vegetative growth with high yield
D
low vegetative growth with low yield
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12
Nitrogen is taken up by plant roots in the form of
A
nitrate ion
B
nitrite ion
C
nitric acid
D
nitrogen gas
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13
In the process of recycling carbon in nature, carbondioxide is used by crops during
A
respiration
B
decomposition
C
photosynthesis
D
transpiration
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14
Which of the following is not an effect of water-logging on crop production? it
A
inhibits plant development
B
encourages leaching
C
inhibits the activities of micro organisms in the soil
D
causes plant roots to wilt
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15
When soils are poorly drained,
A
they dry up easily
B
they form hardpans
C
the air content of the soil is reduced
D
the rate of decomposition is accelerated
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16
Which of the following sources of water is least useful for irrigation purposes?
A
sea
B
river
C
lake
D
borehole
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17
Which of the following sources of farm power is most flexible and adaptable to farm operations?
A
animal power
B
wind power
C
human power
D
solar power
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18
Which of the following sources of power supply to the farm is most unreliable?
A
wind
B
electricity
C
animal
D
machine
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19
Animal power is usually used on the farm for
A
harvesting
B
spraying
C
ploughing
D
planting
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20
The most appropriate farm implement for breaking up soil clod is the
A
harrow
B
plough
C
ridger
D
mower
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