WAEC Agricultural Science 2022 Theory question 104

Theory question 104

Plant Forms and Crop Classification

(a) Complete the table below: for Onion, Ginger and Jute give the botanical name, classification based on use and method of propagation.
(b) A poultry farmer plans to rear broilers in a deep litter house measuring 36 m long and 10 m wide. If a floor space of 0.36 m2 per adult chicken is recommended for broiler production, calculate the number of broilers that the farmer can rear.
(c) State five advantages of introducing legumes in a pasture.

Show the model answer
Model answer

(a) Onion: Allium cepa; vegetable/spice; bulbs or seeds. Ginger: Zingiber officinale; spice; rhizomes. Jute: Corchorus olitorius (or C. capsularis); fibre crop; seeds.
(b) Floor area = 36 × 10 = 360 m²; number = 360 ÷ 0.36 = 1,000 broilers.
(c) Any five: fix nitrogen and improve soil fertility; raise the protein content of the pasture; improve palatability; increase dry matter yield; provide ground cover against erosion; stay green longer into the dry season; reduce need for nitrogen fertilizer.

Explanation

Floor area ÷ space per bird.