2017 WAEC/GCE Agric Science Expo Questions And Answers
1a. Sieve1b (i) For the separation of different soil particles
(ii) store in cool dry place
iii)wash and clean after use
iii)oil or grease regularly
1(c) i) clay
ii) silt
iii) sand(fine)
iviii gravel(coarse sand)
1d). (i) The soil is acidic
(ii) wood ash
iii) limestone
iv) slags
v) water
vi) dolomite/calcite
2a) Disc plough
2b) I - Furrow wheel
II - Beam
IV - Disc Scraper
V - Disc
2c) Furrow wheel - Used for stabilising the rear end of the plough and for guiding the direction of the plough.
*Beam* - Used for holding discs in position or for attachment.
*Standard*- It holds the disc firmly to the beam
*Disc Scraper*- Used for removing mud from the disc
*Disc*- For tilling the soil
2d) For tilling the soil where crops are to be planted
2 e)
- clean or wash and dry after use
- repair or replace faulty parts
- grease joints and parts
- keep away from rain to avoid rusting
3a)
I - Tassels (male flowering part)
II - Silk (female flowering part)
III - Ear/husk
IV - Leaf
V - Stem
3b) Direct seeding
3c) Threshing
Winnowing
Sieving
3d) maize picker/harvester
3e) Black bundle disease
Black/brown spot disease
3f) Use of tolerant/resistant varieties
crop rotation
4a)
I-liverfluke
II-fowl tick
4b)
-it leads to loss of blood.
-it causes liver rot
-it obstructs the bile duct
-it may result in death
-it lead to digestive disturbance
4c)
Cattle
Sheep
Goat
4d)
-tick fever
-heart water diseases
-anaemia
4e)dipping of the animal.
-animals should be kept in a clean surrounding.
-ticks should be hand picked from the body of the host animal
-practice rotational grazing or paddocking
-animal bedding should be changed regularly.
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