Neco 2024 Agricultural Science Question 16
Practice objective / multiple choice question 16 from the 2024 Neco Agricultural Science examination.
A fungal disease incidence in a field follows the logistic model \(I(t)=\frac{100}{1+ae^{-bt}}\) where \(t\) is weeks and the maximum possible incidence is 100 %. At planting (\(t=0\)) the incidence was 5 %. After 4 weeks it was 20 % and after 8 weeks it was 45 %.\n\n(a) Determine the expected incidence after 12 weeks.\n\n(b) If each percent of incidence requires 0.8 L of fungicide per hectare, calculate the amount of fungicide needed (in L ha\(^{-1}\)) for the 12‑week incidence. Give your answer to two decimal places.
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About This Question
This is Neco 2024 Agricultural Science Question 16. It is one of the objective questions from the 2024 Neco Agricultural Science examination.
Difficulty level: Medium .
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