2018/2019 WAEC GCE RUNZ AGRIC SCIENCE PRACTICAL ANSWERS – NOV/DEC EXPO
2018 Waec gce Agric Science PRACTICAL Expo,waec gce 2018/2019 Agric Science PRACTICAL Runz, waec gce 2018 Agricultural Science PRACTICAL questions and answers – nov/dec expo,Agric Science PRACTICAL waec gce 2nd series expo & runz,Aug/sept Agric Science expo
100% VERIFIED AGRIC PRACTICAL ANSWERS
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(1a)
To determine the water content of the soil sample.
(1b)
I – Crucible.
II – Soil sample.
III – Retort stand
IV – Bunsen burner
(1ci)
Water of dry sand = weight of sand and container – weight of container
= 80g – 32g
= 45g
(1cii)
Weight of water lost = original weight of sand and container – final weight
= 95g – 80g
=15g
(1ciii)
Percentage of water lost
= 15/80 x 100/1
= 18.75%
(1d)
(i) Capillary water
(ii) Hygroscopic water
(iii) Gravitational water
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(2a)
Area of farmland = 1/2(70+90)40
=1/2(160)×40
80×40=3200m²
(2b)
The spacing will take an area of 4×4 = 16cm²
The number of banana plants in the farmland =
Total area of farmland/Area taken by each banana
=3200m²/16m²
=200
(2ci)
I – Raging pole
II – Survey Pin
(2cii)
Uses of I:
(i) For marking out area to be measured
(ii) It guides the surveyor
Uses of II:
(i) For marking out chain length as measured
(ii) For making out areas that are not straight
(2ciii)
(i) Rub oil on the metal surface before storage
(ii) Store in a dry place
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3a) I- Grasshopper
II- Weevil
III- Cotton stainer
3b) I- Grasslioppers exlubits Incomplete metamorphosis that is Egg- nymph-adult
3c) Transmission of diseases which are harmful, to Crops
– it leads to Stunted growth, of plants
– leads to yellowing of leaves due to
the absence of macro nutrients like phosphorus
– leads to death of plants.
3d) i) use of avia’des.
ii) setting of traps like funnel entrance traps with trigger mechanisms
iii) use of fenced traps
iv) use of poison baits.
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(4a)
I – Duct
II – Testis
III – Penis
VI – Seminal Viscule
V – Penis coat
IV – Epidermis
(4b)
Duct: It moves the sperm cell from testis to penis.
Testis: It helps to store the sperm cells or spermatozoa.
Penis: It is used to introduce the sperm cell into the female.
Seminal Viscule: It helps to form a fluid in which the sperm cells can move.
Penis coat: It protects the penis
Epidermis: It produces the sperm cells
(4ci)
Castration
(4cii)
(i) Duct will be cut.
(ii) The epidermis will be removed.
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