Neco 2020 Agricultural Science Question 14
Practice objective / multiple choice question 14 from the 2020 Neco Agricultural Science examination.
A \(1.5\) ha earthen pond \(1.2\) m deep is stocked with \(10\,000\) tilapia, each weighing \(0.5\) kg. At \(28\)°C each kilogram of fish consumes \(0.2\) g of dissolved oxygen per hour. Natural photosynthesis in the pond supplies \(150\) g O₂ per hour. The pond volume is \(1.5\) ha × 1.2 m = \(18\,000\) m³ (i.e., \(18\,000\,000\) L). To keep dissolved oxygen above \(5\) mg L\(^{-1}\), determine the minimum aeration rate (in g O₂ per hour) that must be provided.
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About This Question
This is Neco 2020 Agricultural Science Question 14. It is one of the objective questions from the 2020 Neco Agricultural Science examination.
Difficulty level: Hard .
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