WAEC 2018 – AGRIC PRACTICAL ANSWERS FROM STARRUNZ. COM 09030544020

Thursday, 26th April, 2018
Agricultural Science 3 (Practical) – 09:30 a.m. – 11:00 a.m. (1st Set)
Agricultural Science 3 (Practical) – 11:30 a.m. – 1:00 p.m. (2nd Set)
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COMPLETED
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(1a)
Specimen A:
(i) It is used for falling of trees.
(ii) It is used for cutting the trees during stumping.
(iii) It is used for cutting logs of woods into smaller pieces.

Specimen B:
(i) It is used for lifting soil and turning the soil.
(ii) It is used for levelling of the soil.
(iii) It is used for digging holes during transplanting.

Specimen D:
(i) It is used for transplanting of seedling.
(ii) It is used for applying manure after and before planting.
(iii) It is used for nursery operation/practices.

Specimen F
(i) It is used for pulverizing the soil.
(ii) It is used for aerating the
soil.
(iii) It is used for transplanting seedling.

(1b)
(i) The metal parts should be sharpened when blunt.
(ii) The metal parts should be oiled or greased to prevent rusting.
(iii) The wooden parts should be stored or kept in a place where termite cannot eat it.
(iv) Store in a cool and dry place

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(2a)
G – PH 7(neutral)
H – 1-4(acidic)
I – PH -8-14(alkaline OR basic)

(2b)
Specimen G:
When G is added to water sample in a glass beaker and stored with blue and red litmus paper, No colour change was observed, showing neutral.

Specimen H:
When H is added to a water sample in a beaker and stirred and tested with blue and red litmus paper. It changes blue litmus paper to red showing that it is acidic.

Specimen I:
When I is added to a water sample in a beaker and stirred/tested with litmus papers. It changes the red litmus paper to blue showing that it is basic or alkaline.

(2ci)
If the PH is 45 it shows that it is slightly acidic/acidic

(2cii)
(i) It destroys the root of plants.
(ii) It prevents the uptake of food from the root system.
(iii) It prevents the normal growth of plants except plants like tomatoes.

(2ciii)
(i) Washing away of soil nutrients by erosion
(ii) Planting operations like Monocropping
(iii) Excessive use of land of a long period of time

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(3a)
J – Grain weevil
K – Yam tuber beetle
L – Rodents
M- Beetle

(3b)
(i) They bore with seed
(ii) It causes low yield.
(iii) It causes death of plants and reduces farm yield.
(iv) It reduces the farmer’s income.
(v) Transmission of diseases.

(3c)
Specimen J:
(i) By the use of chemicals.
(ii) By the use of pesticides.
(iii) Through hand picking.

Specimen K:
(i)Through the use of pesticides.
(ii) By handpicking.
(iii) By the use of chemicals.

Specimen L:
(i)Through the practise of crop rotation.
(ii) By using fungicides.

Specimen M:
(i)Through the use of rodenticides.
(ii) By setting traps for the rodents

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(4a)
(i) Cattle
(ii) Sheep
(iii) Goat

(4b)
Specimen N
(i) It sucks the blood of its host.
(ii) It reduces the size of its host
(iii) It reduces the market value of its host
(iv) It kills it’s host

Specimen O
(i) It kills it’s host
(ii) It reduces the quality of its host
(iii) It causes anaemia to its host
(iv) It sucks the blood of its host

(4c)
(i) By proper sanitation measures
(ii) By handpicking
(iii) By dipping the infected host in chemicals
(iv) By using insecticides
(v) By isolation of infected animals
(vi) By quarantine

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