Neco 2018 Agricultural Science Question 16
Practice objective / multiple choice question 16 from the 2018 Neco Agricultural Science examination.
On a 12‑ha farm a 4‑year crop rotation of maize and soybean is planned. Maize yields 3.5 t ha\(^{-1}\) and removes 150 kg N ha\(^{-1}\) each year. Soybean yields 2.8 t ha\(^{-1}\) and fixes 45 kg N ha\(^{-1}\) (i.e., net nitrogen removal is -45 kg N ha\(^{-1}\)). To avoid soil nitrogen depletion the average annual nitrogen removal must not exceed 120 kg N ha\(^{-1}\). Determine how many years in the 4‑year cycle should be allocated to maize and how many to soybean so that the nitrogen constraint is satisfied while the total grain yield over the cycle is maximised.
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About This Question
This is Neco 2018 Agricultural Science Question 16. It is one of the objective questions from the 2018 Neco Agricultural Science examination.
Difficulty level: Medium .
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