Gce Model Questions Vol1 2021 Geography Question 20
Practice objective / multiple choice question 20 from the 2021 Gce Model Questions Vol1 Geography examination.
A farmer intends to grow wheat on 5 ha. Without fertilizer the expected yield is 2.5 t ha⁻¹. Applying nitrogen fertilizer (N, in kg ha⁻¹) increases yield according to \[\Delta Y = 0.4N - 0.001N^{2}\ \text{(t ha}^{-1})\], but the total yield cannot exceed 5 t ha⁻¹. Nitrogen costs \$0.80 kg⁻¹ and wheat sells for \$200 t⁻¹. Ignoring all other costs, determine (a) the amount of nitrogen (kg ha⁻¹) that maximises profit, and (b) the maximum total profit for the whole 5 ha farm. Give N to one decimal place and profit to the nearest dollar.
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About This Question
This is Gce Model Questions Vol1 2021 Geography Question 20. It is one of the objective questions from the 2021 Gce Model Questions Vol1 Geography examination.
Difficulty level: Hard .
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