Gce Model Questions Vol1 2025 Geography Question 25
Practice objective / multiple choice question 25 from the 2025 Gce Model Questions Vol1 Geography examination.
To obtain a wheat yield of 8 t ha⁻¹, a farmer needs to supply enough nitrogen for the grain. Wheat grain contains 2 % nitrogen on a dry‑weight basis. The soil already provides 30 kg N ha⁻¹ that is readily available. The fertilizer to be used is urea, which is 46 % nitrogen by weight. The nitrogen use efficiency (NUE) of wheat is 60 % (i.e., only 60 % of the nitrogen applied as fertilizer is taken up by the crop). Urea costs $0.50 per kilogram. Calculate the minimum amount of urea (in kg ha⁻¹) the farmer must apply and the total cost (in dollars) of the fertilizer.
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This is Gce Model Questions Vol1 2025 Geography Question 25. It is one of the objective questions from the 2025 Gce Model Questions Vol1 Geography examination.
Difficulty level: Hard .
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