Waec Model Questions Vol1 2025 Agricultural Science Question 50
Practice objective / multiple choice question 50 from the 2025 Waec Model Questions Vol1 Agricultural Science examination.
In a 3‑ha maize field the current stem‑borer infestation is 12 % of plants. The economic threshold is 5 %. For each 5 % increase in infestation above the threshold, the yield loss is 0.8 t ha⁻¹. Maize sells for ₦150 kg⁻¹. An insecticide application costs ₦12,000 ha⁻¹ and reduces the infestation by 40 % of its present level. Should the farmer apply the insecticide? Calculate the net change in profit per hectare if the insecticide is applied.
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This is Waec Model Questions Vol1 2025 Agricultural Science Question 50. It is one of the objective questions from the 2025 Waec Model Questions Vol1 Agricultural Science examination.
Difficulty level: Medium .
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