2019 JAMB Agricultural Science Past Questions & Answers

Question 1

The following are importance of agriculture except

Accepted Answer

C. Lack of good food

Answer

A. Provision of food

Answer

B. Provision of employment opportunities

Answer

D. Provision of market for industrial goods

Question 2

The following are the features of subsistence agriculture except

Accepted Answer

D. It requires the use of both skilled and unskilled labour

Answer

A. subsistence agriculture is mostly practised by peasant farms

Answer

B. It requires the use of family labour

Answer

C. Pests and diseases are not really controlled

Question 3

The wear and tear of farm structures over time is described as

Accepted Answer

B. depreciation

Answer

A. appreciation

Answer

C. capitalization

Answer

D. salvage value

Question 4

Fertilizers are applied to fishponds to serve as

Accepted Answer

C. nutrients for plankton

Answer

A. bait for fish

Answer

B. food for fish

Answer

D. water purifier

Question 5

The incubation period for turkey is

Accepted Answer

D. 27 days

Answer

A. 15 days

Answer

B. 21 days

Answer

C. 32 days

Question 6

Dura, Tenera and Pisifera are all cultivated varieties of

Accepted Answer

B. oil palm

Answer

A. coconut

Answer

C. rubber

Answer

D. banana

Question 7

The non-oil crop among the following is

Accepted Answer

D. cowpea

Answer

A. coconut

Answer

B. beniseed

Answer

C. melon

Question 8

The main mode of infection of rinderpest disease in cattle is through

Accepted Answer

C. contact

Answer

A. grazing

Answer

B. drinking

Answer

D. inhalation

Question 9

A castrated cockerel is called?

Accepted Answer

C. Capon

Answer

A. Boiler

Answer

B. Pullet

Answer

D. Hen

Question 10

Which one of these is not an advantage of Newspaper as agricultural extension teaching methods?

Accepted Answer

A. It is restricted to only few literate farmer

Answer

B. The pictures they often carry serves as useful teaching aids

Answer

C. They are less expensive

Answer

D. They can also be used in areas where there is no electricity

Question 11

The degree of responsiveness of demand to change in the price of goods or produce is referred to as

Accepted Answer

C. Price Elasticity of demand

Answer

A. Relative Elasticity of demand

Answer

B. Unit Elasticity of demand

Answer

D. Perfect Elastic demand

Question 12

The most unreliable source of power on the farm is

Accepted Answer

B. wind

Answer

A. heat engine

Answer

C. electricity

Answer

D. animal

Question 13

If a crop requires 1.5kg phosphorus per hectare, how many kg of manure will be required per hectare is 1kg manure contains 0.32kg of phosphorus

Accepted Answer

B. 4.69kg

Answer

A. 2.47kg

Answer

C. 7.35kg

Answer

D. 12.3kg

Question 14

In poultry nutrition, the minerals that prevent the laying of thin-shelled eggs are

Accepted Answer

A. calcium and phosphorus

Answer

B. sodium and calcium

Answer

C. phosphorus and sodium

Answer

D. sulphur and phosphorus

Question 15

Which of the following nutrient element is a micro-nutrient

Accepted Answer

D. Boron

Answer

A. Calcium

Answer

B. Iron

Answer

C. Manganese

Question 16

Phalaris minor is a crop associated wood with crop

Accepted Answer

A. Wheat

Answer

B. Maize

Answer

C. Rice

Answer

D. Cotton

Question 17

The type of soil formed is affected by the following factors except

Accepted Answer

D. Farming systems

Answer

A. Climate

Answer

B. Vegetation

Answer

C. Topography

Question 18

In which of the soil layer does most biological activity occur?

Accepted Answer

D. A - horizon

Answer

A. B - horizon

Answer

B. C - horizon

Answer

C. D - horizon

Question 19

Which one of these is not a factor that affect change in supply of agricultural produce

Accepted Answer

C. Changes in prices of commodity

Answer

A. Technology

Answer

B. Changes in the cost of production

Answer

D. Fixed cost

Question 20

Some of the by-products of fish include the following except

Accepted Answer

B. Leather

Answer

A. Fish meal

Answer

C. Oil

Answer

D. Fish silage

Question 21

Which of the following is a type of land tenure system?

Accepted Answer

A. Freehold system

Answer

B. Keyhold system

Answer

C. International system

Answer

D. Land tenure system by theft

Question 22

Which of the following required daily checking in a tractor?

Accepted Answer

B. Engine oil

Answer

A. spark plug

Answer

C. Air cleaner

Answer

D. Battery

Question 23

A variety of oil palm is

Accepted Answer

C. Tenera

Answer

A. Amelonado

Answer

B. Acuminata

Answer

D. Trinitario

Question 24

The optimum temperature for storing yam tuber under cold storage is

Accepted Answer

C. 13°C

Answer

A. 7°C

Answer

B. 9°C

Answer

D. 15°C

Question 25

The process whereby rocks are broken down into small particles through both physical and chemical factors is known as

Accepted Answer

B. Weathering

Answer

A. Rock degradation

Answer

C. Erosion

Answer

D. Oxidation

Question 26

The farm machinery used to sow seeds and apply fertilizer at the same time is

Accepted Answer

D. harrowing

Answer

A. land clearing

Answer

B. threshing

Answer

C. ploughing

Question 27

In order to eliminate food shortage, farm as should

Accepted Answer

A. cultivate more varieties of crops

Answer

B. practise land tenure by inheritance

Answer

C. shift from crop to animal production

Answer

D. construct farm buildings

Question 28

The most effective method of controlling or preventing viral diseases in plants is by

Accepted Answer

C. planting resistant varieties

Answer

A. practising crop rotation

Answer

B. spraying crops regularly

Answer

D. burning affected crops

Question 29

What is crop rotation?

Accepted Answer

A. Growing of crops one after the other in a particular sequence

Answer

B. Growing more than one crop at a time

Answer

C. Growing of an associate crop in between the rows of the main crop

Answer

D. Growing of crops together in strips

Question 30

One major difference between disc plough and disc Harrow is

Accepted Answer

A. Disc plough is used to create wider ridges on the field than disc Harrow

Answer

B. A disc plough can have up to 54 discs on it at once whereas a disc harrow can have up to 6 disc

Answer

C. Disc plough is used to tilled the disc harrowed land

Answer

D. The disc part of plough is notched while that of harrow is round

Question 31

All but one are related to surface irrigation?

Accepted Answer

C. Sprinkler irrigation

Answer

A. Mole drainage

Answer

B. Natural flooding

Answer

D. Check flooding

Question 32

The part of the ruminant stomach from which digestive juices secreted is the

Accepted Answer

C. Abomasum

Answer

A. Rumen

Answer

B. Reticulum

Answer

D. Paunch

Question 33

Which of the following is not a breed of rabbits?

Accepted Answer

B. Land race

Answer

A. New zealand white

Answer

C. Chincilla

Answer

D. Californian white

Question 34

Which one of these is not part of a disc plough

Accepted Answer

A. Planter

Answer

B. Furrow wheel

Answer

C. Coulter

Answer

D. Disc scraper

Question 35

Reduction of ten seedlings of maize to two per stand is referred to as

Accepted Answer

A. Thinning

Answer

B. Spacing

Answer

C. Weeding

Answer

D. Pruning

Question 36

Maize grows best on

Accepted Answer

C. Loamy soil

Answer

A. Sandy soil

Answer

B. Sandy-clay soil

Answer

D. Silty-clay soil

Question 37

Soil texture can be refered to as

Accepted Answer

C. Distribution of the different sizes of soil particles

Answer

A. distribution of soil particles in a given sample

Answer

B. movement of water through the soil

Answer

D. The degree of soil aeration

Question 38

The parent material of a soil is formed from the disintegration of

Accepted Answer

D. Rock

Answer

A. Sand

Answer

B. Silt

Answer

C. Gravel

Question 39

The maturity period of groundnut in month is

Accepted Answer

C. 4 - 5

Answer

A. 1 - 2

Answer

B. 2 - 3

Answer

D. 6 - 7

Question 40

A crop not requiring more than 750mm annual rainfall is most suitable for cultivation in

Accepted Answer

C. Sudan savanna

Answer

A. Rain forest

Answer

B. Sahel savanna

Answer

D. Guinea savanna

Question 41

All are factors to consider when planning a farmstead except?

Accepted Answer

D. Irrigation

Answer

A. Accessibility

Answer

B. Topography

Answer

C. Soil type

Question 42

The following are the advantages of the sprinkler method of irrigation except

Accepted Answer

D. The method may be difficult for local farmers to use

Answer

A. The system can be made automatic

Answer

B. They are portable making them suitable for use

Answer

C. Rate of application of irrigation water can be controlled

Question 43

Farm survey equipment include the following except

Accepted Answer

C. datun

Answer

A. cross staff

Answer

B. Abney level

Answer

D. chain

Question 44

Blast of rice is a

Accepted Answer

C. Fungal disease

Answer

A. Viral disease

Answer

B. Bacteria disease

Answer

D. Deficiency of zinc disease

Question 45

Increase in farm produce is not usually improved by the

Accepted Answer

C. Improved sales of crop and livestock

Answer

A. use of improved crop varieties

Answer

B. Increased use of manure and fertilizer

Answer

D. Use of better farm equipment and tools

Question 46

Crops grown primarily for feeding animals are known as

Accepted Answer

B. forage

Answer

A. vegetables

Answer

C. cereal

Answer

D. shrubs

Question 47

Which of the following nutrient is highly immobile in plants?

Accepted Answer

A. B

Answer

B. Mg

Answer

C. K

Answer

D. P

Question 48

Rural farmers mostly obtain loans from

Accepted Answer

D. Money Lenders

Answer

A. Government

Answer

B. International Monetary Fund

Answer

C. Merchant Banks

Question 49

Which of the following is not a source of farm credit

Accepted Answer

A. Mortgage banks

Answer

B. Government agencies

Answer

C. Agricultural banks

Answer

D. Cooperative societies

Question 50

Which of the following cereal crops most requires nursery practices?

Accepted Answer

B. Rice

Answer

A. Maize

Answer

C. Millet

Answer

D. Guinea corn

Question 51

The type of labour available to peasant farmers is

Accepted Answer

A. family labour

Answer

B. paid labour

Answer

C. skilled labour

Answer

D. migrant labour

Question 52

One of the symptoms of vitamin deficiency diseases in livestock includes except

Accepted Answer

A. Improved fertility

Answer

B. Loss of appetite

Answer

C. Scurvy

Answer

D. Rickets

Question 53

Oil palm trees do well in soils with pH level of

Accepted Answer

C. 5.5 - 6.5

Answer

A. 2.5 - 3.5

Answer

B. 3.5 - 4.5

Answer

D. 6.5 - 7.5

Question 54

Which of the following is not a branch of agriculture?

Accepted Answer

C. Kidding

Answer

A. Forestry

Answer

B. Fishery

Answer

D. Agricultural economics

Question 55

Ideal pH for coffee cultivation is

Accepted Answer

B. 5.0 - 5.5

Answer

A. 4.0 - 4.5

Answer

C. 6.0 - 6.5

Answer

D. 6.5 - 7.5

Question 56

The pox disease in livestock are caused by

Accepted Answer

B. viruses

Answer

A. bacteria

Answer

C. protozoa

Answer

D. fungi

Question 57

The causative organism of maize rust is?

Accepted Answer

D. Fungus

Answer

A. Nematoda

Answer

B. Insect

Answer

C. Bacterium

Question 58

The factor of production whose reward is profit is

Accepted Answer

D. entrepreneurship

Answer

A. land

Answer

B. labour

Answer

C. capital

Question 59

A soil may be called as alkaline when the pH of the soil is more than

Accepted Answer

C. 7.0

Answer

A. 6.5

Answer

B. 5.5

Answer

D. 5.0

Question 60

In animal nutrition, iodine is essential for the production of

Accepted Answer

B. thyrozine

Answer

A. oxygen

Answer

C. insulin

Answer

D. progesterone

Question 61

All but one are qualities of a good extension worker

Accepted Answer

D. Involvement in local politics

Answer

A. Organisational Ability

Answer

B. Clear Judgement

Answer

C. Initiative

Question 62

A good silage should be free of

Accepted Answer

A. moulds

Answer

B. nutrients

Answer

C. moisture

Answer

D. fibre

Question 63

Which of the following is not a source of minerals in animal nutrition?

Accepted Answer

A. Palm oil

Answer

B. Fish meal

Answer

C. Blood meal

Answer

D. Green pastures

Question 64

The farm practices that does not have a very harmful effect on the soil is

Accepted Answer

B. Crop rotation

Answer

A. Flooding

Answer

C. Over grazing

Answer

D. Bush burning

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