2019 WAEC (WASSCE) Agricultural Science Past Questions & Answers

Question 1

Protective functions of forests include the following except

Accepted Answer

D. source of firewood

Answer

A. soil conservation

Answer

B. serving as windbreak

Answer

C. purification of air

Question 2

The practice of measuring and mapping out the size, position and boundary of a farmland is called farm?

Accepted Answer

C. surveying

Answer

A. layout

Answer

B. business

Answer

D. tillage

Question 3

The least important factor for successful incubation of eggs is?

Accepted Answer

A. light

Answer

B. temperature

Answer

C. ventilation

Answer

D. humidity

Question 4

Calculate in hectares the area of a rectangular farmland with dimensions 50m by 25m?

Accepted Answer

D. 0.125ha

Answer

A. 125ha

Answer

B. 12.5ha

Answer

C. 1.25ha

Question 5

The growing of only one crop on a piece of land from year to year is known as?

Accepted Answer

C. monoculture

Answer

A. mixed cropping

Answer

B. crop rotation

Answer

D. shifting cultivation

Question 6

Which of the following groups of organisms are parasites plants?

Accepted Answer

A. nematode, fungus and bacterium

Answer

B. Striga, nematode and dodder

Answer

C. Dodder, fungus and striga

Answer

D. Mistletoe, fungus and bacterium

Question 7

Study and answer this question The soil horizon that is not supportive of the growth of tree crops is?

Accepted Answer

B. horizonB

Answer

A. horizonA.

Answer

C. horizonC

Answer

D. horizonD

Question 8

The main function of the part labelled I is?

Accepted Answer

C. crushing of food particles

Answer

A. temporary storage of food

Answer

B. production of digestive enzymes

Answer

D. transportation of food nutrients

Question 9

The growth of both trees and arable crops on the same piece of land is?

Accepted Answer

D. taungya system

Answer

A. ley farming

Answer

B. mixed farming

Answer

C. forestry

Question 10

Which of the following statements best describes commercial farming?

Accepted Answer

B. large scale agricultural production for sale

Answer

A. production of plants and animals for family consumption

Answer

C. large scale agricultural production for family consumption

Answer

D. use of family labour for large scale agricultural production

Question 11

Which of the following statements are advantages of mulching? it I.Controls weeds II.Conserves soil moisture. III.Increases soil temperature. IV.Reduces soil pH.

Accepted Answer

A. I and II

Answer

B. I and III

Answer

C. II and IV

Answer

D. III and IV

Question 12

Which of the following factors of agricultural production is abundant in rural areas?

Accepted Answer

B. Land

Answer

A. Enterprise

Answer

C. Labour

Answer

D. Capital

Question 13

Which of the following hormones is responsible for oestrus in farm animals?

Accepted Answer

B. oestrogen

Answer

A. oxytocin

Answer

C. prolactin

Answer

D. progesterone

Question 14

Which of the  following statement about inbreeding in farm animal is/are false? I.Inbred animals reach market weight early II.Inbred animals have reduced vigour III.Inbreeding increases the occurrences of undesirable traits

Accepted Answer

A. I Only

Answer

B. II Only

Answer

C. I and II Only

Answer

D. I and III Only

Question 15

A major characteristic of mass teaching method of agricultural extension is that?

Accepted Answer

A. information can be directed to a large number of people at different locations

Answer

B. it demonstrates how to carry out new techniques to farmers in the same locality

Answer

C. feedback is readily available to extension officers

Answer

D. it summarizes and analyses what had been done in previous learning situations

Question 16

An advantage of communal land tenure system is that it?

Accepted Answer

B. makes land cheap to acquire

Answer

A. encourages use of land for permanent projects by individuals

Answer

C. leads to fragmentation

Answer

D. does not promote farm mechanization

Question 17

Which of the following breeds of cattle is exotic?

Accepted Answer

C. friesian

Answer

A. Sokoto gudali

Answer

B. ndama

Answer

D. muturu

Question 18

The vector of leaf curl disease of cotton is?

Accepted Answer

D. white fly

Answer

A. grasshopper

Answer

B. termites

Answer

C. thrips

Question 19

Determine the equilibrium price of rice.

Accepted Answer

D. N4.00

Answer

A. N1.00

Answer

B. N2.00

Answer

C. N3.00

Question 20

The type of rock formed from accumulation of materials transported by water is called?

Accepted Answer

A. sedimentary rock

Answer

B. igneous rock

Answer

C. metamorphic rock

Answer

D. plutonic rock

Question 21

In a crop rotation system, it is usually preferred that cassava comes last in the rotation because it?

Accepted Answer

C. is a deep rooted crop

Answer

A. adds nitrogen to the soil

Answer

B. is a shallow feeder

Answer

D. is a perennial crop

Question 22

The data for feed consumption and weight gain of our four farm animals labelled P,Q,R and S are shown below. Use the data to answer this question correctly P: 50kg feed consumed and 20kg weight gained. Q: 90kg feed consumed and 30kg weight gained. R: 100kg feed consumed and 25kg weight gained. S: 150kg feed consumed and 30kg weight gained. Which of the animals is the most efficient feed converter?

A.P
B.Q
C.R
D.S

Show answer

Answer: A. P

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Accepted Answer

B. 0.33

Answer

A. 0.40

Answer

C. 0.25

Answer

D. 0.20

Question 23

In green manuring, crops are ploughed into the soil just before flowering in order to?

Accepted Answer

B. enrich the soil with nutrients

Answer

A. control soil pathogens

Answer

C. control soil erosion

Answer

D. increase the soil temperature

Question 24

Which of the following parasites may be found in the gut of livestock?

Accepted Answer

C. Roundworm

Answer

A. Tick

Answer

B. Flea

Answer

D. Louse

Question 25

A biotic factor affecting agricultural production is?

Accepted Answer

B. predator

Answer

A. rainfall

Answer

C. humidity

Answer

D. temperature

Question 26

Biological control of insect-pests of crops is carried out through?

Accepted Answer

B. use of predators

Answer

A. crop rotation

Answer

C. use of pesticides

Answer

D. farm sanitation

Question 27

Which of the following mineral elements is essential for chlorophyll formation?

Accepted Answer

D. magnesium

Answer

A. calcium

Answer

B. boron

Answer

C. sodium

Question 28

The wallow should be provided in the pen of pigs in order to?

Accepted Answer

D. cool the temperature of pigs

Answer

A. reduce the feed intakes of pigs

Answer

B. increase the water intakes of pigs

Answer

C. enable the pigs to swim

Question 29

The data for feed consumption and weight gain of our four farm animals labelled P,Q,R and S are shown below. Use the data to answer this question correctly P: 50kg feed consumed and 20kg weight gained. Q: 90kg feed consumed and 30kg weight gained. R: 100kg feed consumed and 25kg weight gained. S: 150kg feed consumed and 30kg weight gained. Which of the animals is the most efficient feed converter?

A.P
B.Q
C.R
D.S

Show answer

Answer: A. P

Get a step-by-step AI explanation in the app Get a step-by-step AI explanation in the app

Accepted Answer

A. P

Answer

B. Q

Answer

C. R

Answer

D. S

Question 30

During the production of palm oil, the oil palm fruits are boiled in order to?

Accepted Answer

B. prevent high level of oil rancidity

Answer

A. harden the kernel

Answer

C. extract oil from the palm fruit

Answer

D. separate mesocarp from endocarp

Question 31

Sexual propagation of omamental plants involves the use of?

Accepted Answer

B. seeds

Answer

A. stems

Answer

C. suckers

Answer

D. rhizomes

Question 32

If maize seed is sown at a spacing of 100cm x 50cm, determine the expected maize plant population per hectare?

Accepted Answer

B. 20,000

Answer

A. 40,000

Answer

C. 5,000

Answer

D. 2,000

Question 33

Bone meal is usually included in the diet of livestock to supply?

Accepted Answer

A. calcium and phosphorus

Answer

B. calcium and iodine

Answer

C. phosphorus and iron

Answer

D. magnesium and sodium

Question 34

A major storage pest of cereals in West Africa is?

Accepted Answer

B. weevil

Answer

A. stem borer

Answer

C. bird

Answer

D. army worm

Question 35

Corns, rhizomes and tubers are examples of?

Accepted Answer

B. underground stems

Answer

A. underground roots

Answer

C. aerial stems

Answer

D. modified leaves

Question 36

Which of the following problems are associated with agricultural marketing in West Africa? I.seasonality of produce II.Transportation of produce III.Access to credit

Accepted Answer

D. I, ll and III

Answer

A. I and II only

Answer

B. I and III only

Answer

C. II and III only

Question 37

A disadvantage of farm mechanization?

Accepted Answer

B. displacement of farm workers

Answer

A. efficiency in farming

Answer

C. reduction in health hazards

Answer

D. timeliness of farm operations

Question 38

Vegetative growth in fish ponds?

Accepted Answer

D. moderates pond temperature

Answer

A. makes fish movements easy

Answer

B. regulates water acidity

Answer

C. increases pond water turbidity

Question 39

A socio-cultural factor affecting land availability is?

Accepted Answer

B. religion

Answer

A. soil type

Answer

C. topography

Answer

D. mining

Question 40

Which of the following implements is used for primary tillage?

Accepted Answer

C. plough

Answer

A. ridger

Answer

B. cultivator

Answer

D. harrow

Question 41

Liquid fertilizers and pesticides could be applied through?

Accepted Answer

C. sprinkler irrigation

Answer

A. furrow irrigation

Answer

B. channel irrigation

Answer

D. flood irrigation

Question 42

Which of the following statement about land is not correct?

Accepted Answer

D. it can be relocated

Answer

A. its supply is limited

Answer

B. it is used for agricultural production

Answer

C. it is subject for depreciation

Question 43

In animal production, immature spermatozoa are stored in the?

Accepted Answer

C. epididymis

Answer

A. urethra

Answer

B. scrotum

Answer

D. prostrate gland

Question 44

Which of the following statements is not a reason for budding? The resulting plants_______

Accepted Answer

D. develop broader leave for photosynthesis

Answer

A. can withstand adverse climatic conditions

Answer

B. flower and fruit early

Answer

C. are more disease resistant

Question 45

A fresh garden soil sample weighed 25kg. When oven-dried, its weight reduced to 20kg. Calculate the percentage moisture content of the soil sample.

Accepted Answer

C. 20.0%

Answer

A. 5.0%

Answer

B. 12.5%

Answer

D. 25.0%

Question 46

A planting material used in propagating plaintain is the?

Accepted Answer

B. peeper

Answer

A. crown

Answer

C. slip

Answer

D. leaf

Question 47

What is the change in quantity of rice demand when the price increases from N1.00 to N5.00?

Accepted Answer

D. 2kg

Answer

A. 8kg

Answer

B. 6kg

Answer

C. 4kg

Question 48

Study and answer this question below   A periodic maintenance activity carried out on the illustrated farm machinery is?

Accepted Answer

A. checking the radiator water

Answer

B. checking for tyre pressure

Answer

C. changing engine oil

Answer

D. cleaning after use

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