Neco Model Questions Vol1 2025 Agricultural Science Question 5

Practice essay / theory question 5 from the 2025 Neco Model Questions Vol1 Agricultural Science examination. This question covers Crop Production, Soil Fertility, Fertilizer Management, Crop Rotation .

Neco Model Questions Vol1 2025 Agricultural Science Essay / Theory
Topics: Crop Production Soil Fertility Fertilizer Management Crop Rotation
Question 5 NECO_MODEL_QUESTIONS_VOL1 • 2025 • AGRICULTURAL_SCIENCE • essay

A farmer intends to cultivate maize on a 5‑hectare field. Soil analysis of the top 15 cm shows an available phosphorus (P) level of 12 mg kg⁻¹, whereas the recommended level for optimum maize production is 20 mg kg⁻¹. The farmer plans to use triple superphosphate (TSP) that contains 46 % P₂O₅ by weight.

Question Parts

( a )
Calculate the amount of TSP (in kilograms) that must be applied per hectare to raise the soil P level to the recommended value. Show all steps of your calculation.
( b )
Discuss two advantages of applying organic manure together with the inorganic TSP fertilizer on the same field.
( c )
Outline a three‑year crop‑rotation plan for the field that will help sustain soil fertility for continuous maize production. Include the main crop(s) for each year and the purpose of each crop in the rotation.

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About This Question

This is Neco Model Questions Vol1 2025 Agricultural Science Question 5. It is one of the essay questions from the 2025 Neco Model Questions Vol1 Agricultural Science examination.

The question covers Crop Production, Soil Fertility, Fertilizer Management, Crop Rotation .

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