1989 - WAEC Agriculture Past Questions and Answers - page 2
11
Which of the following is not an effect of burning on the soil?
A
increasing the organic matter in the soil
B
increasing the soil nutrients
C
increasing the acidity of the soil
D
exposing the soil to erosion
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12
The function of soil micro-organisms include the following except
A
decomposition of dead plant and animal remains
B
recycling of nutrients
C
causing plant or animal diesases
D
living as parasites on crop plants
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13
Slate is derived from
A
schist
B
sandstone
C
shale
D
gneiss
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14
The following are advantages of the sprinkler method of irrigation except
A
rate of application of irrigation water can be controlled
B
portable nature of many sprinkler system make them suitable for use
C
the sprinkler system can be made automatic
D
method can be where topography affects horrowing of land
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15
Rhizobium supplies nitrogen to leguminous plants by
A
changing some mineral salts to sulphate of ammonia
B
incoporating urea into its body
C
fixing atmospheric nitrogen
D
decomposing plant remains
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16
The advantage of providing drainage ditches in farms is that it
A
requires periodic clearing
B
is inconvenient for farm mechanization
C
is labour intensive
D
is unsuitable for draining basement of farm buildings
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17
Which of the following sources of farm power cannot be effectively used for processing agricultural products?
A
animals
B
electricity
C
sun
D
machines
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18
The instrument used to measure the relative humidity is
A
thermometer
B
anemometer
C
hygrometer
D
hydrometer
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19
The most important limitation of agricultural mechanization is
A
small holdings
B
lack of technical know-how
C
poor marketing system
D
inadequate storage facilities
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20
The best tool(s) a farmer should use to measure out a large farm accurately include(s) the
A
garden line and measuring tape
B
measuring tape and ranging poles
C
measuring tape only
D
garden line only
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