2020 JAMB Agricultural Science Past Questions & Answers

Question 1

Investments with long life span in agricultural economics are otherwise known as

Accepted Answer

A. capital

Answer

B. entrepreneurship

Answer

C. savings deposit

Answer

D. profit

Question 2

The quantity of rice that a consumer is willing and able to buy during a given period is simply the consumer's

Accepted Answer

A. demand for rice

Answer

B. elastic limit

Answer

C. supply of rice

Answer

D. preference for rice

Question 3

Which of the following activities is correct about agricultural extension agent?

Accepted Answer

B. educating farmers on the use of improved inputs and techniques in agriculture

Answer

A. teaching farmers the management of exotic breeds of animals and crops

Answer

C. training school leavers to become professional farmers

Answer

D. encouraging graduates to take up agriculture as a profession

Question 4

Capital in agriculture includes the following item except

Accepted Answer

C. labour

Answer

A. tree crops

Answer

B. livestock

Answer

D. machinery

Question 5

Agricultural uses of land include

Accepted Answer

A. silviculture

Answer

B. mining

Answer

C. housing

Answer

D. transportation

Question 6

Marketing processes do not include

Accepted Answer

A. production

Answer

B. assembling

Answer

C. distribution

Answer

D. processing

Question 7

One of the limitation of mechanization of farms is

Accepted Answer

B. exposure of soil to the effects of climate

Answer

A. reduction in the cost of production

Answer

C. increase in yield of crops

Answer

D. reduction of farm labour

Question 8

In encouraging farmers to produce more of a particular crop, the Nigerian government has helped farmers in marketing that crop through the establishment of

Accepted Answer

C. marketing boards

Answer

A. rural schools of agriculture

Answer

B. markets for the sale of crops

Answer

D. rural extension offices

Question 9

Artificial scarcity of agricultural produce is often caused by the following marketing agents except

Accepted Answer

D. co-operatives

Answer

A. farmers

Answer

B. wholesalers

Answer

C. middlemen

Question 10

Which of the following is not component of soil?

Accepted Answer

D. texture

Answer

A. air

Answer

B. water

Answer

C. organic matter

Question 11

Andropogon gayanus is commonly called

Accepted Answer

C. gamba grass

Answer

A. guinea grass

Answer

B. elephant grass

Answer

D. spear grass

Question 12

Which of the following nutrient element is a macro-nutrient?

Accepted Answer

A. phosphorus

Answer

B. zinc

Answer

C. iron

Answer

D. manganese

Question 13

Farm surveying can be defined as the

Accepted Answer

C. making measurements on land from which maps are drawn

Answer

A. leveling of land during road construction

Answer

B. sighting of structures through a theodolite

Answer

D. estimation of the type and properties of soil on a farm

Question 14

The primary role of agriculture is the provision of

Accepted Answer

C. food for man and his animals

Answer

A. foreign exchange earnings

Answer

B. raw materials for industries

Answer

D. employment and income for farmers

Question 15

Which of the following is not a characteristic of a good pasture?

Accepted Answer

D. high stem to leaf ratio

Answer

A. high quality grass

Answer

B. provision of balance nutrients

Answer

C. ability to withstand trampling

Question 16

Pasture crops are best used in preparing hay

Accepted Answer

B. just before flowering

Answer

A. when they are two weeks old

Answer

C. just after seed maturation

Answer

D. after they have started to dry up

Question 17

Which of the following is not a sign of animal approaching parturition?

Accepted Answer

D. drop in milk productio

Answer

A. soft, pliable and swollen vulva

Answer

B. relaxed cervix

Answer

C. full mammary gland

Question 18

Government agricultural policies include the following except

Accepted Answer

D. increasing the number of peasant farmers

Answer

A. increasing the production of food crops and animals

Answer

B. increasing the efficiency of production of export crops

Answer

C. supplying raw materials for use in local industries

Question 19

Daily management routines in poultry include the following except

Accepted Answer

B. debeaking

Answer

A. egg collection

Answer

C. water and feed provision

Answer

D. health care

Question 20

A biotic factor influencing agricultural production is

Accepted Answer

B. predator

Answer

A. rainfall

Answer

C. soil structure

Answer

D. wind

Question 21

A soil with the PH range of 6.1 to 6.9 can be described as

Accepted Answer

D. slightly acidic

Answer

A. alkaline

Answer

B. very acidic

Answer

C. slightly alkaline

Question 22

Which of the following sources of farm power is most flexible and adaptable to farm operations?

Accepted Answer

C. human power

Answer

A. animal power

Answer

B. wind power

Answer

D. solar power

Question 23

Which of the following is an example of igneous rock?

Accepted Answer

D. granite

Answer

A. gneiss

Answer

B. limestone

Answer

C. standstone

Question 24

Which of the following is not a source of farm power?

Accepted Answer

D. plough

Answer

A. wind

Answer

B. bull

Answer

C. tractor

Question 25

Management practices in a piggery include the following except

Accepted Answer

D. weekly vaccination of pigs

Answer

A. disinfecting pens

Answer

B. regular cleaning of feed and water troughs

Answer

C. isolating sick animals

Question 26

From the curve above, at what point is it advisable for the farmer to stop further addition of input?

Accepted Answer

B. II

Answer

A. I

Answer

C. III

Answer

D. IV

Question 27

Spermatozoa are produced in the

Accepted Answer

B. testicles

Answer

A. penis

Answer

C. prostate grand

Answer

D. cowper's gland

Question 28

Which of the following may cause disease in a fish pond?

Accepted Answer

C. poor management practices

Answer

A. mixed stocking

Answer

B. liming

Answer

D. harvesting

Question 29

During which of the following plant propagation methods is the tool represented used?

Accepted Answer

B. Seedling transplant

Answer

A. Seed planting

Answer

C. Budding

Answer

D. Layering

Question 30

The act of giving birth in farm animals is called

Accepted Answer

C. parturtion

Answer

A. brooding

Answer

B. cloning

Answer

D. gestation

Question 31

Improvement of yam through breeding is difficult because

Accepted Answer

A. it possesses no sexual reproductive system

Answer

B. naturally growing types have to be used

Answer

C. its rapid multiplication is very difficult

Answer

D. its genes do not segregate

Question 32

Maize is a very important crop because apart from serving as a staple, it

Accepted Answer

C. forms the base of most livestock feeds

Answer

A. is ploughed into the soil to increase fertility

Answer

B. can be processes into corn flakes

Answer

D. is used for producing germ oil

Question 33

Birds temporarily store their food in the

Accepted Answer

A. crop

Answer

B. gizzard

Answer

C. proventriculus

Answer

D. duodenum

Question 34

Under normal circumstances, the concept of consumer sovereignty in agriculture implies that

Accepted Answer

A. the consumer and not the farmer determines what to produce

Answer

B. both the farmer and the consumer determine what to produce

Answer

C. the consumer and not the farmer owns the means of production

Answer

D. the environmental factors determine what to produce

Question 35

Which of the following is not the role of government in agricultural production?

Accepted Answer

D. provision of labour

Answer

A. provision of loans and credits

Answer

B. building of storage facilities

Answer

C. establishment of efficient marketing outlets

Question 36

Which of the following is not a breed of cattle?

Accepted Answer

D. sokoto red

Answer

A. ndama

Answer

B. sokoto gudali

Answer

C. white fulani

Question 37

Which of the following is not a quality for selecting livestock?

Accepted Answer

C. mortality rate

Answer

A. feed consumption

Answer

B. egg production

Answer

D. body weight

Question 38

The physical properties of soil include the following except

Accepted Answer

A. PH

Answer

B. colour

Answer

C. moisture content

Answer

D. porosity

Question 39

Which of the following factors usually affects the colour of egg yolk?

Accepted Answer

C. type of feed

Answer

A. age of the laying hen

Answer

B. type of housing

Answer

D. colour of the cock

Question 40

The best control ensure for rinderpest disease in cattle is

Accepted Answer

B. vaccination

Answer

A. sanitation

Answer

C. use of antibiotics

Answer

D. eradication of infected stock

Question 41

The mating of a white fulani bull and an N'dama cow could be termed?

Accepted Answer

D. Cross breeding

Answer

A. Inbreeding

Answer

B. Line breeding

Answer

C. Outbreeding

Question 42

Cassava is mainly propagated by

Accepted Answer

D. cuttings

Answer

A. seedlings

Answer

B. layering

Answer

C. budding

Question 43

The damage to the stem of maize plants resulting in hollowness and lodging is most likely caused by

Accepted Answer

C. stem borers

Answer

A. rodents

Answer

B. grasscutters

Answer

D. weevils

Question 44

A soil with pH2 can be described as

Accepted Answer

C. highly acidic

Answer

A. moderately acidic

Answer

B. moderately alkaline

Answer

D. highly alkaline

Question 45

The most common soil mineral found in all crystalline rocks and a main constituent of granite and sandstone is

Accepted Answer

B. quartz

Answer

A. biotite

Answer

C. mica

Answer

D. granite

Question 46

The national tree-planting campaign is aimed at stimulating

Accepted Answer

B. afforestation

Answer

A. wildlife conservation

Answer

C. taungya farming

Answer

D. forest reservation

Question 47

To which of the following crops does the term 'ginning' apply?

Accepted Answer

D. cotton

Answer

A. kenaf

Answer

B. cocoa

Answer

C. groundnut

Question 48

Smut disease of cereals is caused by a

Accepted Answer

B. fungus

Answer

A. bacterium

Answer

C. protozoan

Answer

D. nematode

Question 49

In subsistence agriculture,

Accepted Answer

B. surplus produced is small

Answer

A. yields are usually high

Answer

C. savings are made

Answer

D. farm sizes are large

Question 50

The most appropriate farm machinery for breaking soil is the

Accepted Answer

B. plough

Answer

A. harrow

Answer

C. ridger

Answer

D. tractor

Question 51

Which of the following will be responsible for the poor yield of fertile soil in a high rainfall area?

Accepted Answer

A. leaching of soil nutrients

Answer

B. very low pH value of land

Answer

C. lack of soil microbes

Answer

D. high alkalinity of soil

Question 52

The soil nutrient which is important as a constituent of plant proteins and hormones is

Accepted Answer

B. sulphur

Answer

A. calcium

Answer

C. iron

Answer

D. potassium

Question 53

Agricultural extension programme would succeed in disseminating new ideas to farmers except if the programme

Accepted Answer

C. involved only the support to highly trained agricultural extension specialist

Answer

A. is based on research tested on local conditions

Answer

B. involves the people for which the programme is planned

Answer

D. is not kept flexible to contemporary technology

Question 54

The most common grazing system in West Africa is

Accepted Answer

A. continuous grazing

Answer

B. rotational grazing

Answer

C. deferred grazing

Answer

D. zero grazing

Question 55

Which of the following is not a sign of heat in farm animals?

Accepted Answer

C. udder enlargement

Answer

A. loss of appetite

Answer

B. restlessness

Answer

D. grunting

Question 56

Which of the following is not normally a pasture crop?

Accepted Answer

A. mucuna

Answer

B. centrosema

Answer

C. stylosanthes

Answer

D. giant star grass

Question 57

The scientific name for guinea grass is

Accepted Answer

A. panicum maximum

Answer

B. imperata cylindrica

Answer

C. cynodon dactylon

Answer

D. andropogon gayanus

Question 58

Which of the following groups of crops requires a nursery?

Accepted Answer

B. oil palm, cocoa and tomato

Answer

A. cotton,sorghum and tomato

Answer

C. cocoa, maize and rice

Answer

D. banana, coffee and tomato

Question 59

Leguminous cover crops do not

Accepted Answer

D. reduce the soil microbial population

Answer

A. bind the soil particles together through their roots

Answer

B. increase the nitrogen content of soils

Answer

C. aid in improving the soil organic matter content

Question 60

The length of oestrus cycle (in days) in goat is

Accepted Answer

B. 18 - 21

Answer

A. 16 - 17

Answer

C. 19 - 20

Answer

D. 20 - 22

Question 61

A farmer uses his agricultural loans for the following except

Accepted Answer

A. marketing his crops

Answer

B. hiring machineries and tools

Answer

C. purchasing drugs for livestock

Answer

D. paying for seeds

Question 62

Animal which chew the cud are

Accepted Answer

C. ruminants

Answer

A. amphibians

Answer

B. aves

Answer

D. reptiles

Question 63

The main purpose of including leguminous crops in pastures is to serve as a source of

Accepted Answer

A. proteins

Answer

B. vitamins

Answer

C. minerals

Answer

D. carbohydrates

Question 64

During the processes of soil formation, the cracks or crevices that are first noticed on the rocks are normally caused by

Accepted Answer

D. temperature

Answer

A. ice

Answer

B. man

Answer

C. wind

2020 JAMB Agricultural Science Past Questions and Answers

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2020 JAMB Agricultural Science Past Questions and Answers

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