Waec Model Questions Vol1 2024 Agricultural Science Question 46
Practice objective / multiple choice question 46 from the 2024 Waec Model Questions Vol1 Agricultural Science examination.
A 2‑ha fish pond is stocked with catfish at 8,000 fingerlings per hectare. The initial total stock is therefore 16,000 fingerlings. The fish grow according to the logistic model W(t)=K/[1+((K‑W0)/W0) e^{-rt}] where K=800 g, W0=10 g and r=0.3 month⁻¹. Mortality is 5 % per month. The pond can sustain at most 12,000 fish at any time because of oxygen limitation. Harvest is carried out when the average fish weight reaches at least 600 g. Determine the earliest whole month at which the harvest can be made without exceeding the oxygen limit.
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About This Question
This is Waec Model Questions Vol1 2024 Agricultural Science Question 46. It is one of the objective questions from the 2024 Waec Model Questions Vol1 Agricultural Science examination.
Difficulty level: Hard .
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