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WAEC - Agricultural Science (2002)

1
Subsistence agriculture mainly involves
Answer
(C)
food production using family labour
2
The major export crops produced in the West African sub-region include
Answer
(C)
cocoa,rubber,groundnut and cotton
3
A major problem of grains storage in the rain forest zone of West Africa is high
Answer
(D)
humidity
4
When the government provides subsidies in agriculture,
Answer
(A)
farm inputs are made available to farmers at reduced prices
5
Most agricultural policies do not benefit rural communities because
Answer
(D)
they are formulated by non-practising farmers
6
Plant quarantine regulations are enforced to
Answer
(A)
prevent the intoduction of foreign pests and diseases
7
The primary purpose of establishing wildlife reserve is to
Answer
(B)
prevent extinction of wild animals
8
The most important factor that limits agricultural production in West Africa is
Answer
(C)
rainfall
9
An acidic soil can be neutralized by the addition of
Answer
(C)
wood ash
10
Capillarity is highest in
Answer
(D)
clay
11
Which of the following describes the effects of excessive nitrogen application on the growth of maize plants?
Answer
(A)
high vegetative growth with low yield
12
Nitrogen is taken up by plant roots in the form of
Answer
(A)
nitrate ion
13
In the process of recycling carbon in nature, carbondioxide is used by crops during
Answer
(C)
photosynthesis
14
Which of the following is not an effect of water-logging on crop production? it
Answer
(D)
causes plant roots to wilt
15
When soils are poorly drained,
Answer
(C)
the air content of the soil is reduced
16
Which of the following sources of water is least useful for irrigation purposes?
Answer
(A)
sea
17
Which of the following sources of farm power is most flexible and adaptable to farm operations?
Answer
(C)
human power
18
Which of the following sources of power supply to the farm is most unreliable?
Answer
(A)
wind
19
Animal power is usually used on the farm for
Answer
(C)
ploughing
20
The most appropriate farm implement for breaking up soil clod is the
Answer
(B)
plough
21
The daily maintenance practice carried out on a disc harrow is
Answer
(B)
cleaning the soil off the disc
22
Which of the following is an advantage of mechanization?
Answer
(A)
carrying out many farm operations with ease
23
Sexual propagation involves the use of
Answer
(B)
seeds
24
The process of inducing root development on portions of stems still attached to the parent plant is known as
Answer
(C)
layering
25
Which of the following crops requires shade in the early stages of its growth in the field?
Answer
(D)
cocoa
26
Which of the following groups of crops is widely frown in areas with high rainfall?
Answer
(A)
cocoa,oilpalm,rubber and kola
27
An important forage crop in West Africa is
Answer
(C)
giant star grass
28
The most important reason for encouraging afforestation in the arid regions of West Africa is to
Answer
(D)
serve as wind break
29
The growing of both forest trees and arable crops simultaneously on the same piece of land is termed
Answer
(D)
taungya system
30
Which of the following plant diseases is not caused by fungi?
Answer
(B)
maize streak
31
mosaic disease affects
Answer
(C)
cassava and tobacco
32
The following are biting and chewing insects except
Answer
(D)
moths
33
Mealy bug is a major pest of
Answer
(B)
cassava
34
Weeds which produce light and numerous seeds are normally dispersed by
Answer
(A)
wind
35
Which of the following effects is not a consequence of 'introduction' in crop improvement? Introduced crops
Answer
(D)
hamper the growth of local varieties
36
In which part of the alimentary canal of poultry is grit mostly found?
Answer
(C)
gizzard
37
Parturition in farm animals marks the end of
Answer
(D)
gestation
38
A sow is normally expected to farrow
Answer
(C)
twice a year
39
High temperatures on livestock induces the following effects except
Answer
(A)
high feed intake
40
Rabbits are kept in cages called
Answer
(B)
hutches
41
Farm animals are identified by the following methods except
Answer
(C)
shearing
42
Which of the following is not a characteristic of pigs?
Answer
(D)
unlimited ability to digest fibre
43
Dried cassava should not exceed 50% of the total ration of pigs because
Answer
(A)
too much cassava in diets will lead to excessive fat deposit
44
The sugar is most commonly found in the blood of animals is
Answer
(A)
glucose
45
Foot and mouth disease is caused by a
Answer
(B)
virus
46
Which of the following symptoms indicate anthrax disease?
Answer
(B)
sudden death without any visible sign of sickness
47
Which of the following practices may cause fish diseases in a pond?
Answer
(C)
poor management
48
Selection and hybridization are all methods of animal
Answer
(D)
improvement
49
The system of breeding that is practiced when N'dama cows are mated by muturu bulls is
Answer
(C)
cross breeding
50
In a crop production enterprise, a fixed factor of production could be the
Answer
(A)
size of the land
51
On a curve for the law of diminishing returns, maximum output is obtained at the
Answer
(C)
apex of the curve
52
Farmers often find it difficult to obtain loans from banks for agricultural projects because they
Answer
(C)
have no collateral security
53
Farm accounts help the farmer to
Answer
(A)
manage the farm as a business
54
A maize farmer obtains a loan of N120,000.00 at an interest rate of 9% to be repaid in one year.Calculate the interest to be paid on the loan.
Answer
(A)
N10,800.00
55
Agricultural extension programme
Answer
(A)
promotes practical application of useful agricultural information