Neco Model Questions Vol1 2025 Agricultural Science Question 24
Practice objective / multiple choice question 24 from the 2025 Neco Model Questions Vol1 Agricultural Science examination.
Early blight infects 2 % of the leaf area of a 5‑ha tomato field on day 0. Each day the infected area increases by 15 % of the remaining healthy area. A fungicide applied reduces the infected area instantly by 40 % and its effectiveness decays exponentially with a half‑life of 3 days (i.e., each day the reduction factor is multiplied by \(2^{-1/3}\)). The farmer applies the fungicide on day 0 and again on day 4. What is the percentage of leaf area infected at the end of day 7? Give your answer to one decimal place.
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About This Question
This is Neco Model Questions Vol1 2025 Agricultural Science Question 24. It is one of the objective questions from the 2025 Neco Model Questions Vol1 Agricultural Science examination.
Difficulty level: Medium .
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