Neco 2024 Agricultural Science Question 45
Practice objective / multiple choice question 45 from the 2024 Neco Agricultural Science examination.
A 2‑ha field is to be planted with maize. Maize requires 150 kg N ha⁻¹. The soil supplies 30 kg N ha⁻¹. Urea (46 % N) is the only nitrogen fertilizer available and its nitrogen use efficiency is 70 %. (a) Calculate the amount of urea (kg ha⁻¹) that must be applied to meet the crop's nitrogen requirement. (b) After the maize harvest, the unabsorbed nitrogen from the applied urea remains in the soil. Assuming the same efficiency, determine the amount of residual nitrogen (kg ha⁻¹) available for a subsequent cowpea crop that needs 40 kg N ha⁻¹. State whether the residual nitrogen is sufficient and, if so, the excess amount.
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About This Question
This is Neco 2024 Agricultural Science Question 45. It is one of the objective questions from the 2024 Neco Agricultural Science examination.
Difficulty level: Medium .
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