Waec Model Questions Vol1 2022 Agricultural Science Question 8
Practice objective / multiple choice question 8 from the 2022 Waec Model Questions Vol1 Agricultural Science examination.
A lake supports a fish population that follows logistic growth: dP/dt = rP(1‑P/K), where K = 200 000 kg, r = 0.4 yr⁻¹ and P is the biomass in kg. Harvests of 30 000 kg are taken at the beginning of each year for three consecutive years. Assuming the population at the start (year 0) is at carrying capacity, (a) will the biomass remain above 50 000 kg after the third harvest? (b) What is the greatest constant annual harvest H_max (in kg, rounded to the nearest whole number) that can be taken each year indefinitely without ever allowing the post‑harvest biomass to fall below 50 000 kg?
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About This Question
This is Waec Model Questions Vol1 2022 Agricultural Science Question 8. It is one of the objective questions from the 2022 Waec Model Questions Vol1 Agricultural Science examination.
Difficulty level: Hard .
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