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2009 - WAEC Agriculture Past Questions and Answers - page 2

11

It is not advisable to apply fresh farmyard manure because

A
its heat of decomposition may cause scorching of plants
B
some microorganisms in the manure may die
C
the manure may increase soil acidity
D
the manure may increase soil alkalinity
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12

Magnesium deficiency in crops can be corrected by the application of

A
dolomite
B
limestone
C
quicklime
D
urea
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13

The atmosphere gains carbon dioxide through the following ways except

A
burning of fuel such as coal and wood
B
respiration by plants and animals
C
photosynthesis in plants
D
death and decay of plants and animals
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14

Controlled burning has the advantage of

A
increasing the number of soil organisms
B
inducing re-growth of pasture grasses
C
increasing the amount of nutrients in the soil
D
improving soil structure
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15

Which of the following fertilizers should be applied for good plant growth after prolonged use of sulphate of ammonia on a neutral soil?

A
ammonium nitrate
B
lime
C
urea
D
single superphosphate
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16

Which of the following statements indicate advantages of sub-surface irrigation? I. Low operation cost once established II. Does not disturb the movement of implements III. Permits efficient use of water IV. easily floods the field

A
I,II and III only
B
II,III and IV only
C
I,II and IV only
D
I,II,III and IV
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17

The removal of excess water from the sub-soil is known as

A
irrigation
B
drainage
C
evaporations
D
dehydration
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18

The best source of farm power for agricultural production is

A
human power
B
animal power
C
mechanical power
D
solar power
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19

The greatest disadvantage of using a bulldozer in land clearing is that it

A
removes the fertile top soil along with the vegetation
B
makes the soil lose its texture
C
allows the fast growth of weeds after clearing
D
increases the incidence of pests
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20

Mechanization is difficult to practice where the

A
land is fragmented
B
farmer is wealthy
C
farm holding is large
D
soil fertility is low
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