Official Waec 2020 Agricultural Science Questions & Answers


Wednesday, 19th August 2020

Agriculture Science 2 (Essay) 2pm – 4:10pm
Agriculture Science 1 (Objective) 4:10pm – 5pm

Poor Transportation
(Choose Any Two)

(i)construction of new feeder roads to open up the rural areas
(ii)construction of water ways to link up the riverine area
(iii)construction of railways to connect rural areas to the urban centres
(iv)Reduction in transportation cost to make such affordable to the rural farmers
(v)Provision of vehicles ,boats and trains to facilitate the distribution of farm product

Environmental degradation
(Choose Any two)
(i)Flooding should be avoided
(ii)soil erosion should be properly checked
(iii)cover cropping should be practised
(iv)Terracing and strip cropping should also be practised
(v)Pollution and deforestation should be avoided

Use of crude farm input
(choose Any two)
(i)Government should subsidise the cost of farm input
(ii)Farm input should be supplied at the right time to farmers
(iii)Local sourcing of these inputs should be encouraged
(iv)Establishment of tractor- hiring unit at affordable costs to farmers

Animal power
(choose Any Three)
(i)Treat animals fairly to prevent them from being hostile
(ii)Do not overwork draught animals
(iii)Feed and provide them with adequate water
(iv)Make sure that animals are healthy
(v)Apply muzzle and keep them in a healthy environment

Electrical power
(i) Ensure adequate supply of light
(ii) Proper checking of all electrical appliances in the farm
(iii) The operator must be an expert

(i) To increase durability.
(ii) To increase efficiency.
(iii) Reduce costs of replacement.
(iv) For safety of the user/avoid accidents.
(v) Avoid damage to the tool.


(2ai)Soil texture: refers to the relative proportion (sizes) of the various particles of the soil . in other words,it refers to the degree of fitness or coarseness of the various soil particle.

(2aii)soil structure: refers to the ways in which different particles of the soil are packed or arranged. it is also refers to the shape and arrangement of primary particles to form compound particles

(2aiii)soil profile:refers to the vertical section of the soil,showing series of horizontal layers of different type of soil and these horizontal layers are called horizons.

(i) It is used to rapidly increase the number of desirable cultivars
(ii) It is used to change plant form
(iii) I Used to repair damaged plant parts

(i) Mango
(ii) Guava

(i) Mulching
(ii) Application of farmyard manure
(iii) Bush fallowing

(i) Storage in airtight bins helps maintaining insect free grains.
(ii) Before storing grains the go downs (store houses) should be disinfected. Following methods of disinfestations of store rooms are recommended
(iii) Threshing yard should be situated more than a mile away from the granaries so as to reduce the chance of pest reaching to granaries through migration.
(iv) For bag storage of grains, “pucca” cement concrete or brick made store houses are recommended.



In a tabular form:

(i) Bacteria
(ii) Cattle, sheep, goat
(iii) Fever, loss of appetite
(iv) Proper vaccination

(v) Fungi
(vi) Dog, pig
(vii) Cough, fever
(viii) Proper vaccination or isolation of affected animals

(i) It helps to improve hygiene of the chickens
(ii) It also helps to reduce incidence of friction.
(iii) It helps to reduce excess exercises thereby leading to a better production.
(iv) It leads to lost cost.
(v) It does not require the problem of letters.

(i) It leads to higher incidence of foot lesions.
(ii) It leads to high incidence of metabolic disorder.
(iii) Lack of dust bathing opportunities.
(iv) Lack of behavioural opportunities.
(v) It may lead to high risk of diseases.



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