Neco 2023 Geography Question 50

A farmer intends to cultivate maize on \(5\) ha. Soil analysis shows the land already contains \(60\ \text{kg N ha}^{-1}\). Maize requires \(150\ \text{kg N ha}^{-1}\). The farmer will apply urea fertilizer (46% N by weight). Urea costs \(\text{₦}30{,}000\) per tonne. The market price of maize is \(\text{₦}25{,}000\) per tonne, and the expected yield response is \(4\) tonnes per ha for every \(100\ \text{kg N}\) applied (i.e., yield increase = \(4\times\frac{N_{applied}}{100}\) tonnes per ha). Assuming the farmer applies exactly the amount of urea needed to meet the nitrogen requirement, calculate the total fertilizer cost, the expected increase in maize production (tonnes), the total revenue from the increased yield, and the net profit (revenue minus fertilizer cost). Show all calculations.