2022 WAEC Agric Science Practical Answers

Agricultural Science 3 (Practical) 11:30 am. – 1:00 pm. (2nd Set)

(1a)
To carry out castration with the burdizzo, the animal is secured and the spermatic cord is palpated within the scrotum. The burdizzo clamp is placed across the cord and closed.

(1b)
Specimen C:
(i) For identification
(ii) For tracking

Specimen D
(i) Used for tightening and loosening of nuts and bolts.
(ii) Used for changing tyrees in the wheel barrow and machines.

Specimen E
(i) For the illumination of the farm.
(ii) For heating

(1c)
Specimen B:
(i) Plier
(ii) Emasculator

Specimen E:
(i) Solar lamp
(ii) Battery touches

(2ai)
F – Granular in nature
G – It has bulk density
H – Dry matter content

(2aii)
(PICK ANY ONE)
(i) They are used in enriching the soil with nutrients
(ii) They are used increasing soil fertility to ensure good vegetative growth that results in high crop production.

(2aiii)
(i) Broadcasting
(ii) Placement
(iii) Foliar application

(2b)
Choose a well-drained area before digging pits.
Then dig two pits.
Collect plant residues such as grass, cleared bushes, weeds from your farm, animal waste,etc.
Ensure the plant residues are in small sizes to speed up the decomposition process.
Use one pit to collect animal waste and the other pit to mix and decompose animal waste with the other waste materials.
Mix the plant residues with animal waste like waste from poultry, pigs, goats, cattle and donkeys, thoroughly and leave it to decompose.
Add water to make mixing easier and pave way for faster decomposition.
Leave them to decompose in the second pit for about a month then remove the compost manure from the pit to a heap where it decomposes further and dries up for two weeks depending on the weather.
Keep on rolling the compost as it integrates oxygen into the pit and breaks up clumps.

(2c)
F – Clean up excess fertilizer on your sidewalk or driveway
G – Ensure it is properly added to the soil
H – Ensure hand gloves are worn

(3a)
I: Arachis hypogaea
J: Gossypium species
K: Elaeis guineensis
L: Hevea braziliensis

(3b)
I: Legume crops
J: Fibre crops
K: Oil crops
L: Latex crops

(3c)
-Cleaning
-Dehulling
-Heating
-Grinding
-Pressing
-Filtration

(3d)
(CHOOSE ANY THREE)
(i) Vascular wilt
(ii) Bud and spear rot
(iii) Sudden wilt
(iv) Red ring disease
(v) Basal stem rot disease.

(4a)
M – Monogastric
N – Monogastric
O – Ruminant

(4b)
N – It has thick muscular wall and contain small stones or gastritis.
O – It is composed of several muscular sac.
P – It is a long, narrow, folded or coiled tube extending from the stomach to the large intestine
Q – It is a large meaty organ that sits on the right side of the stomach

(4c)
Specimen N:
(i) It aid in digestion by particle size reduction(grinding).
(ii) Chemical degradation of nutrients and regulation of feed flow

Specimen O:
(i) It houses many tiny organisms which aid in the digestion of food such as hay and grass.
(ii) It store chewed plant material and grain that a ruminant regurgitates

Specimen P:
(i) It aid digestion.
(ii) Absorption of digested food.

Specimen Q:
(i) Regulation of body temperature.
(ii) Storage of glycogen, vitamins and minerals.