Gce Model Questions Vol1 2022 Agricultural Science Question 5

A farmer has 5 hectares of land and plans to adopt a two‑year crop rotation of maize (Zea mays) and soybeans (Glycine max). The following information is available: - Expected average yield of maize = 4.5 t ha⁻¹; market price = ₦150 000 t⁻¹. - Expected average yield of soybeans = 2.8 t ha⁻¹; market price = ₦120 000 t⁻¹. - Maize requires 150 kg of nitrogen (N) per tonne of grain produced. - Soybeans fix 45 kg N per tonne of grain and return 30 kg N ha⁻¹ to the soil as residue after harvest. - Synthetic N‑fertiliser (urea) costs ₦55 000 per tonne (46 % N by weight). - The farmer will apply fertiliser only to the maize crop and will rely on the residual N from the preceding soybean crop. - Fixed production costs (land preparation, planting, pest control) are ₦25 000 ha⁻¹ each year, irrespective of the crop. Using this information, answer the following: