Neco Model Questions Vol1 2020 Agricultural Science Question 11
Practice objective / multiple choice question 11 from the 2020 Neco Model Questions Vol1 Agricultural Science examination.
A farmer practices a 3‑year crop rotation of maize - soybean - maize on a 1 ha field. Soil nitrogen supplies 30 kg N ha⁻¹. Maize yield (t ha⁻¹) follows the relation \(Y = 2 + 0.02\times N_{total}\) where \(N_{total}\) is total nitrogen (soil + fertiliser) in kg ha⁻¹. In year 1 the farmer applies 120 kg N ha⁻¹ as fertiliser and harvests maize. In year 2 soybean is grown, fixes 50 kg N ha⁻¹ and receives no fertiliser. In year 3 maize is planted again, but the fertiliser amount is reduced by 30 % of the year 1 rate. Calculate the total grain yield (t ha⁻¹) obtained over the three‑year cycle.
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About This Question
This is Neco Model Questions Vol1 2020 Agricultural Science Question 11. It is one of the objective questions from the 2020 Neco Model Questions Vol1 Agricultural Science examination.
Difficulty level: Medium .
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