Gce Model Questions Vol1 2017 Agricultural Science Question 15
Practice objective / multiple choice question 15 from the 2017 Gce Model Questions Vol1 Agricultural Science examination.
In a soybean field the aphid density (number of aphids per plant) is monitored. The relationship between density \(D\) and yield loss is \(\text{Loss %}=0.05\,D^{0.8}\). The average yield is 2.5 t ha\(^{-1}\) and the market value of soybeans is ₦300 per tonne. The cost of an insecticide application is ₦150 ha\(^{-1}\). Calculate the aphid density per plant at which the economic threshold is reached (i.e., the value of the loss equals the control cost). Give your answer rounded to the nearest whole aphid.
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About This Question
This is Gce Model Questions Vol1 2017 Agricultural Science Question 15. It is one of the objective questions from the 2017 Gce Model Questions Vol1 Agricultural Science examination.
Difficulty level: Medium .
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