WAEC 2024 AGRIC PRACTICAL ANSWER


(1)


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(2a)
To investigate the capillarity and water retention properties of different soil types

(2b)
E: The rise in water level is the lowest.

F: The rise in water level is the highest.

G: The rise in water level is intermediate.

(2c)
(i) The extent of capillary rise in the tubes indicates the capillary action of different soil types
(ii) The water rise differences reflect soil texture and water retention capabilities.

(2d)
Cotton wool is used to prevent soil particles from falling out while allowing water absorption.

(2ei)
The soil in the capillary tube labeled G (dry loam) is best for agriculture.

(2ei)
(PICK ANY TWO)
(i) Loam provides good drainage and moisture retention, essential for plant growth.
(ii) It supports healthy root development and soil microorganisms.
(iii) Loam is rich in nutrients, promoting robust plant growth.
(iv) It has a stable structure, reducing erosion and maintaining soil fertility.

(2f)


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(3a)
H: Chewing mouthparts.
J : Chewing mouthparts.
K: Piercing and sucking mouthparts.

(3b)
Effects of Specimen H on crop production:
(PICK ANY THREE)
(i) Damage to stored maize grains.
(ii) Reduction in grain quality and quantity.
(iii) Economic losses to farmers and storage facilities.
(iv) Risk of mycotoxin contamination due to fungal growth facilitated by weevil infestation.
(v) Decreased market value of infested maize.

Effects of Specimen J on crop production:
(PICK ANY THREE)
(i) Defoliation of plants
(ii) Reduction in crop yield
(iii) Damage to young seedlings
(iv) Increased plant susceptibility to diseases
(v) Decreased quality of harvested produce

(3c)
(PICK ANY THREE)
(i) Proper sanitation by keeping the store clean and free from spilled grains.
(ii) Regular inspection of stored maize for signs of infestation.
(iii) Use of hermetic storage methods such as airtight containers or bags to suffocate the weevils.
(iv) Application of chemical insecticides approved for grain storage, following recommended dosage and safety precautions.
(v) Employing physical control measures such as freezing or heating the infested maize to kill the weevils and their eggs.

(3d)
(PICK ANY THREE)
(i) Okra
(ii) Hibiscus
(iii) Eggplant
(iv) Bell peppers
(iv) Tomatoes

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(4)


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