2017 WAEC/GCE Agric Science Expo Questions And Answers

2017 WAEC/GCE Agric Science Expo Questions And Answers

1a. Sieve

1b (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)

  1. clean or wash and dry after use
  2. repair or replace faulty parts
  3. grease joints and parts
  4. 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
agric science expo


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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