WAEC Agricultural Science Questions 2020 Objective and Theory Updates.

Filed in Exam, WAEC News by on August 18, 2020

– WAEC Agricultural Science Questions –

WAEC Agricultural Science Questions expo are out now on our website. In this article, I will show you past WAEC Agricultural Science random repeated questions for free. All you need to do is to stay focus and follow this guide.

WAEC Agricultural Science Questions 2020

The West African Examinations Council (WAEC) is an examination board that conducts the West African Senior School Certificate Examination, for University and Jamb entry examination in West African countries.

In a year, over three million candidates registered for the exams coordinated by WAEC. 

WAEC GCE Agricultural Science Question and Answers 

Keep accessing this page as update will be made in a jiffy 



(i) Granting farmers loan
(ii) Establishment of agencies like Nigeria Agriculture and Co-operative Bank(N.A.C.B)

(i) Establishment of adult education for farmers
(ii) Sensitizing farmers on importance of being educated

(i)Employment of extension officer to sensitize farmers
(ii) Funding of extension programmes

(i)Government should make policies that will favour farmers and discourage foreign counterparts
(ii) Government should create a good marketing channels for distribution of farm produce.


= Disc plough
(i) does not have numerous small disc
(ii) has no scrappers
(iii) no drawbar

= Disc Harrow
(i) consist of numerous small disc
(ii) has scrappers
(iii) has drawbar

(i) It destroy soil structure
(ii) It may results in erosion
(iii) It causes compaction because of its heavy weight
(iv) It affect the fertility of the soil

(i) It determines whether the soil is well developed
(ii) It takes shorter time in the formation of immature soil
(iii) It also takes a long time for plant to decay and become part of the soil

(i) It provides water for hydrolysis
(ii) It helps to break down some parent rocks to form soil
(iii) It enhances vegetative growth of plants whose roots cause further breakdown

(i) They constitute major materials from which soil is formed
(ii) It determines the chemical composition of the soil formed
(iii) It’s hardness affects the rate of soil formation

(i) Non-uniform of crops
(ii) Most exhaustive crops should be followed by less exhaustive e
(iii) Deep rooted crops should be succeeded by shallow rooted crops
(iv) Leguminous crops should be grown after non-leguminous crops

(i) It serves as cover crops
(ii) It serves as food for livestock
(iii) It is used as green manure
(iv) It helps to prevent erosion
(v) It is used for roofing farmstead

(3a) Selective exploration is cutting or harvesting only matured trees in a forest. It is a way of concentrating certain selected species of timber in a forest reserve.

The system allows for the harvesting of older trees while the younger ones remain as cover to the surface of the forest. It is the legal felling of trees based on certain criteria such as maturity and species.


(i) It ensures the concentration of selected species of timber in a forest.

(ii) It protects the soil from erosion.

(iii) It ensures the continuous supply of timber.

(i) It optimizes the balance of vegetative and reproductive growth
(ii) It increases the efficacy of fertilization and pest control
(iii) It helps in prevention and treatment of disease.
(iv) It reduces risk of failure from dead or weak branches

(i) To increase the total and head yield of the paddy
(ii) To prevent the loss of nutrients during milling
(iii) To salvage wet or damaged paddy
(iv) To prepare the rice according to the requirements of consumers

(i) By use of chemicals such as herbicides
(ii) By weeding
(iii) By cultural practices
(iv) By use of good tillage operation
(vi) Use of resistance varieties

(i) They are used to enhance the beauty of a garden or home.
(ii) They are grown for food. Some chillies are grown as ornamental plants. An example is capsicums.
(iii) Some ornamentals can be used for medicinal purposes.Example of ornamental herbs are rosemary, mexican marigold and lemongrass.
(iv) They absorb carbon dioxide from the air and output oxygen thereby creating cleaner air.
(v) Fallen leaves of ornamental plants makes good mulch and compost.


-Feed Conversion Ratio (FCR)-
(i) 6

-Feed Conversion Ratio (FCR)-
(ii) 5

-Feed Intake(g)-
(iii) 223.2

-Weight Gain-
(iv) 51.2

-Weight Gain-
(v) 26.3

-Feed Intake-
(vi) 719.2
-Weight Gain-
(vii) 58
-Feed Conversion Ratio (FCR)-
(viii) 22.7
(i) Feed H – 22.7
(ii) Feed B – 5
(i) Meat
(ii) Skin
(iii) Bone
(iv) Fur
(v) Milk
(i) Hydration
(ii) Hydrolysis
(iii) Oxidation

WAEC Agric Science Essay Answers 2021

Paper 2 (Essay)

(1)(a) Explain each of the following terms as used in animal production:
(i) Dipping;
(ii) Dry cow;
(iii) Culling;
(iv) Quarantine
(b) Describe the life cycle of roundworm (Ascaris lumbricoides)
(c) Explain the term farm mechanization.
(d) Name four tractor coupled implements

(2)(a) State six limitations of farm mechanization in West Africa.
(b) Suggest six ways of encouraging farm mechanization in West Africa.
(c) List four methods of identification in cattle management.
(d) What is debeaking in poultry management?

(3)(a) Mention two processes that release carbon dioxide into the atmosphere
(b) Name four storage pests of crops
(c) State two functions of Potassium in crops.
(d) List three ways by which each of the following biotic factors affects agricultural production:
(i) parasites;
(ii) Soil organisms.
(e) State four advantages of zero tillage.

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Comments (4)

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  1. President fatula says:

    Pls help me with literature & eng lang 2018 waec

  2. Cynosure says:

    Pls help me with maths an literature.


  3. uche john says:

    pls help me with mathematics and literature answers. Number is

  4. Kareem tunde says:

    I need curent gce qustion

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