JAMB - Agricultural Science (2021)

1
The primary role of agriculture is the provision of
Answer
(C)
food for man and his animals
2
In subsistence agriculture
Answer
(B)
surplus produce is small
3
Gestation period is defined as the time
Answer
(B)
between conception and parturition
4
The hormone responsible for milk let down in female farm animals is
Answer
(C)
Oxytosin
5
The adult male cattle is called
Answer
(A)
bull
6
Layer's ration contains more limestone than grower's ration because limestone
Answer
(D)
supplies sufficient minerals to layers for shell formation
7
Which of the following is not a method of improving rangeland?
Answer
(A)
practicing continuous grazing
8
Miracidium is one of the stages in the life cycle of
Answer
(B)
liver fluke
9
Which of the following is not a symptom of foot and mouth disease of cattle?
Answer
(D)
blood stained diarrhea
10
Heavy infestation of liver fluke causes poor absorption of fats in livestock by
Answer
(D)
inhibiting the action of digestive enzymes
11
Methods of preserving fish include the following except
Answer
(A)
boiling
12
Which of the following fishing gears can be used for total harvesting of pond?
Answer
(D)
dragnet
13
The practice of mating closely related animals is called
Answer
(D)
inbreeding
14
The natural resource utilized for production is
Answer
(D)
land
15
An increase in supply of agricultural produce can be caused by the following factors except
Answer
(D)
consumers buying less products
16
Which of the following constitutes subsidy in agricultural enterprise?
Answer
(A)
supply of fertilizers to farmers at reduced price
17
Records of money transactions in a farming business are termed
Answer
(B)
farm accounts
18
An advantage of extensive system of rearing goats is
Answer
(A)
low labour requirement
19
The main processes involved in the marketing of cotton include the following except
Answer
(A)
wedding
20
Which of the following agricultural extensions aims at reaching a large number of farmers at the same time?
Answer
(A)
mass method
21
Which of the following is not an example of edaphic factors?
Answer
(D)
storm
22
The practice of bee farming is called
Answer
(A)
Apiculture
23
The study of insect pests of crops is called
Answer
(A)
entomology
24
Which of the following is not a characteristic of metamorphic rock?
Answer
(C)
they may contain fossils
25
What is the full meaning of IITA?
Answer
(A)
International Institute of Tropical Agriculture
26
Rocks formed by the cooling and solidification of molten rocks called magma ejected from beneath the earth's crust is
Answer
(A)
Igneous rock
27
Which of the following is a friend of farmer
Answer
(A)
earthworm
28
The source of food for fishes in the river is called
Answer
(B)
planktons
29
A farmer bought a farm implement for ₦12,500 in 2007. At the end of the fourth year, he sold it for ₦4,300. The annual depreciation of the implement is
Answer
(C)
₦2,050
30
The average weather condition of a place, measured over a long period of time is called
Answer
(A)
climate
31
Which of the following equipment is a farm implement?
Answer
(D)
mistblower
32
A periodic maintenance activity carried out using a farm tractor is
Answer
(C)
cleaning after use
33
Which of the following sources of farm power is most versatile in West Africa?
Answer
(B)
animal
34
Farm surveying equipment include the following except
Answer
(C)
Spade
35
A piece of land is said to be on lease to a farmer when the land is
Answer
(D)
given for a specific period on rental basis
36
The problems associated with land tenure through inheritance include the following except
Answer
(C)
right of individuals to free use and control of inherited land
37
The alternate heating and cooling of rocks result in
Answer
(D)
fragmentation
38
Which of the following factors influence agricultural production is biotic factor?
Answer
(A)
parasite
39
The system in which a farmer uses a piece of land for a period and abandons it for another land is called
Answer
(C)
shifting cultivation
40
What is the percentage water content of soil sample which weighed 180g when fresh and 120g when oven-dried?
Answer
(C)
33.33%
41
The main objectives of agriculture is
Answer
(C)
food production
42
Food shortage can be minimized by
Answer
(A)
efficient pest control services
43
Subsistence agriculture is characterized by
Answer
(C)
small farm holdings
44
Output is higher in commercial agriculture because of the following reasons except
Answer
(C)
employment of large labour force
45
The most common factor affecting land use is
Answer
(A)
population pressure
46
Financial assistance from government to the farmers is usually in the following forms except
Answer
(B)
tax
47
Which of the following groups of animals is usually kept in game reserves?
Answer
(D)
lions, elephants and donkeys
48
The following processes in crops are sensitive to daylength except
Answer
(D)
branching
49
Rain water is made available to crops through
Answer
(D)
root absorbtion
50
Which of the following rocks is formed from shale?
Answer
(B)
slate
51
The horizon of a soil profile which encourages the greatest level of microbial activity is
Answer
(A)
A - horizon
52
The easiest method of determining soil texture in the field is by
Answer
(D)
feeling
53
The type of soil with a particle size of 0.02 to 0.002mm is
Answer
(B)
slit
54
If urea fertilizer contains 46% nitrogen, calculate the amount of nitrogen in 25kg bag of fertilizer?
Answer
(A)
11.5kg
55
Fertile soil is one which
Answer
(D)
contain all essential plant nutrients in suitable proportion
56
The effects of practicing crop rotation include the following except
Answer
(C)
adding humus to the soil
57
The method of irrigation suitable for use on a steep slope is
Answer
(D)
shadoof
58
The main source of power for subsistence agriculture is
Answer
(D)
man
59
The most suitable source of power for stationary equipment on the farm is
Answer
(B)
electricity
60
An important farm machine used for coupling many implements is
Answer
(C)
tractor
61
Which of the following is the correct order for land preparation?
Answer
(A)
land clearing → ploughing → harrowing → ridging
62
Which of the following surveying equipment is used for measuring angles during farm surveying?
Answer
(A)
Theodolite
63
Which of the following farm practices is not mechanized?
Answer
(D)
transplanting
64
The main aim of mechanized agriculture is
Answer
(C)
having a large land area for cultivation
65
The following are necessary operations in maize cultivation except?
Answer
(C)
nursery practices
66
Ginning is a method of processing
Answer
(B)
cotton
67
Ginger is propagated by
Answer
(B)
rhizomes
68
Which of the following is not correct about Stylosanthers gracilis?
Answer
(A)
It is an animal legume
69
Which of the following is not a problem of forest management?
Answer
(C)
planting different varieties of timber
70
The tree species commonly planted for pulp wood is
Answer
(A)
Gmelina
71
Root-knot disease of tomato is caused by
Answer
(B)
nematode
72
Callosobruchus maculates is a common pest of
Answer
(B)
cowpea
73
Gummosis disease of citrus is caused by
Answer
(B)
fungi
74
Which of the weeds is dispersed by wind?
Answer
(D)
Tridax (Tridax procumbeus)
75
The characteristic symptoms of mosaic disease of crops is usually observed on
Answer
(B)
leaves