Waec Model Questions Vol1 2018 Agricultural Science Question 1

Practice essay / theory question 1 from the 2018 Waec Model Questions Vol1 Agricultural Science examination. This question covers Agricultural Ecology, Crop Rotation, Soil Fertility, Agro‑ecological Practices .

Waec Model Questions Vol1 2018 Agricultural Science Essay / Theory
Topics: Agricultural Ecology Crop Rotation Soil Fertility Agro‑ecological Practices
Question 1 WAEC_MODEL_QUESTIONS_VOL1 • 2018 • AGRICULTURAL_SCIENCE • essay

A farmer practices mixed cropping on a 5‑hectare farm located in a tropical savanna zone where the mean annual rainfall is 1200 mm, evenly distributed. The farmer rotates maize, cowpea and groundnut in a three‑year cycle. The soil is a Ferric Acrisol with low organic matter.

Question Parts

( a )
Explain how the three‑year rotation of maize, cowpea and groundnut contributes to soil fertility and pest management.
( b )
The farmer wishes to increase the soil organic carbon (SOC) by 0.5 t C ha⁻¹ per year. Assuming the bulk density of the soil is 1.3 g cm⁻³ and the depth of incorporation is 15 cm, calculate the amount of dry crop residue that must be added each year, given that the residue contains 40 % carbon.
( c )
Discuss two ecological advantages of maintaining a hedgerow of native trees along the field boundary.

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About This Question

This is Waec Model Questions Vol1 2018 Agricultural Science Question 1. It is one of the essay questions from the 2018 Waec Model Questions Vol1 Agricultural Science examination.

The question covers Agricultural Ecology, Crop Rotation, Soil Fertility, Agro‑ecological Practices .

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