Waec Model Questions Vol1 2022 Agricultural Science Question 5

Practice essay / theory question 5 from the 2022 Waec Model Questions Vol1 Agricultural Science examination. This question covers Crop Production, Soil Fertility, Manure Application, Crop Rotation .

Waec Model Questions Vol1 2022 Agricultural Science Essay / Theory
Topics: Crop Production Soil Fertility Manure Application Crop Rotation
Question 5 WAEC_MODEL_QUESTIONS_VOL1 • 2022 • AGRICULTURAL_SCIENCE • essay

A farmer cultivates maize on a 5‑hectare field. The current average yield is 2.5 tonnes per hectare. He intends to increase the yield by 20 % in the next season. To achieve this, he plans to use a locally produced organic manure that contains 1.5 % nitrogen (N) by weight. Maize requires an average of 120 kg of N per hectare for the desired yield. The farmer also intends to adopt a crop‑rotation system with a leguminous crop.

Question Parts

( a )
Calculate the target yield per hectare and the total maize production expected from the 5‑hectare field after the 20 % increase.
( b )
Determine the quantity of organic manure (in kilograms) that must be applied to the whole field to supply the required nitrogen for the target yield.
( c )
Discuss two advantages and two disadvantages of using the organic manure compared with an inorganic nitrogen fertilizer.
( d )
Explain how incorporating a leguminous crop in a rotation sequence can further enhance soil fertility for the subsequent maize crop.

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About This Question

This is Waec Model Questions Vol1 2022 Agricultural Science Question 5. It is one of the essay questions from the 2022 Waec Model Questions Vol1 Agricultural Science examination.

The question covers Crop Production, Soil Fertility, Manure Application, Crop Rotation .

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