1991 - WAEC Agriculture Past Questions and Answers - page 1
1
The most important soil micro-organisms concerned with decay and nutrients-recycling are
A
bacteria and fungi
B
fungi and algea
C
alga and actinomyces
D
actinomyces and bacteria
correct option: a
Users' Answers & Comments2
the nutrient content of soil may be influenced by the following except
A
harrowing
B
topography
C
cropping
D
fallowing
correct option: a
Users' Answers & Comments3
What happens to the nitrogen and sulphur contents of vegetation when burning is used as a means of lans clearing? They
A
are released by burning and lost as gases
B
remain in ash as nitrates and sulphates
C
raise the PH of an acid soil
D
are released into the soil thus increasing the nutrients of the soil
correct option: a
Users' Answers & Comments4
Which of the following does not occur as a result of poor drained soil?
A
mottling near the top
B
decrease in rooting depth
C
change in colour of the subsoil
D
decrease in organic matter content
correct option: e
Users' Answers & Comments5
The different types of soil are determined by the relative amounts of each of the following components except
A
rocks
B
air
C
water
D
minerals
correct option: a
Users' Answers & Comments6
Fertilizers that usually contain one nutrient which can be used directly by plants are commonly called
A
organic fertilizers
B
mixed fertilizers
C
inorganic fertilizers
D
compound fertilizers
correct option: e
Users' Answers & Comments7
A soil with particles of less than 0.002mm in diameter is referred to as
A
clay
B
silt
C
sand
D
gravel
correct option: a
Users' Answers & Comments8
Which of the following factors does not bring about soil formation?
A
climate
B
time
C
parent material
D
sunshine
correct option: d
Users' Answers & Comments9
Plant micro-nutrients include the following except
A
sulphur
B
copper
C
iron
D
zinc
correct option: a
Users' Answers & Comments10
Most crop plants do not survive in water-logged soils because
A
the dissolved nutrients are too diluted for crop plants
B
the plants will not photosynthesize
C
their leaves are turgid for respiration
D
their physiological processes will be increased
correct option: e
Users' Answers & Comments