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2013 - WAEC Agriculture Past Questions and Answers - page 2

11

Soils can become acidic as a result of the continuous application of

A
single superphosphate
B
sulphate of ammonia
C
muriate of potash
D
NPK 15: 15: 15
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12

Which of the following species of bacteria lives symbiotically in root nodules of legumes?

A
Azotobacter
B
Clostridium
C
Nitrobacter
D
Rhizobium
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13

Plant nutrients are restored during the fallow period through

A
reduced soil erosion
B
accumulation of soil organic matter
C
reduced evaporation from the soil
D
accumulation of farmyard manure
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14

The processes by which animals release carbon dioxide into the air are

A
respiration and decay
B
respiration and ammonification
C
nitrification and decay
D
denitriflcatin and ammonification
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15

Which of the following practices leads to land degradation in the savanna zones of West Africa? l. Constant annual bushfire ll. Overgrazing of grassland lll. Application of cattle manure. IV. Cutting of woody species for fuel wood

A
l,ll and lll only
B
l, ll and lV only
C
ll, lll, and IV only
D
l, ll, lll and lV
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16

a 100kg NPK 15: 15: 15 compound fertilizer has a filler make -up weight of

A
30kg
B
40kg
C
45kg
D
55kg
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17

One of the main disadvantages of mechanical tillage is the

A
low intial cost of equipment
B
need for special training before machines can be used
C
use of heavy equipment leading to soil compaction
D
use of foreign exchange to purchase machine parts
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18

Which of the following factors affect the work rate of draught animals? l. Feed intake ll. Breed of animal III. Harness for hitching. IV. Height of animal

A
l, ll and lll only
B
l, ll and IV only
C
ll, lll and IV only
D
l, ll, lll and IV
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19

Which of the following features could lead to wrong reading on a prismatic compass?

A
A BIG TREE
B
WIND DIRECTION
C
A POND
D
MAGNETIC ATTRACTION
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20

WHICH OF THE FOLLOWING STEPS GIVES A CORRECT SEQUENCE FOR SURVEYING A FARMSTEAD?

A
Reconnaissance → preliminary survey → mapping
B
mapping → reconnaissance → preliminary survey
C
preliminary survey → reconnaissance → mapping
D
preliminary survey → mapping → reconnaissance
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