Neco 2021 Agricultural Science Question 32
Practice objective / multiple choice question 32 from the 2021 Neco Agricultural Science examination.
A farmer rotates three crops over a three‑year cycle: year 1 maize, year 2 soybean, and year 3 wheat. Maize removes 120 kg N ha⁻¹, wheat removes 80 kg N ha⁻¹, and soybean adds 50 kg N ha⁻¹ (no removal). The soil initially contains 200 kg N ha⁻¹. What is the net nitrogen remaining in the soil (kg N ha⁻¹) after the three‑year rotation?
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About This Question
This is Neco 2021 Agricultural Science Question 32. It is one of the objective questions from the 2021 Neco Agricultural Science examination.
Difficulty level: Medium .
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