Neco 2022 Agricultural Science Question 5

Practice essay / theory question 5 from the 2022 Neco Agricultural Science examination. This question covers Crop Production .

Neco 2022 Agricultural Science Essay / Theory
Topic: Crop Production
Question 5 NECO • 2022 • AGRICULTURAL_SCIENCE • essay

A farmer intends to grow maize and soybeans on a 5‑hectare farm using a mixed cropping system. The soil test indicates the following available nutrients per hectare: nitrogen (N) 30 kg, phosphorus as P₂O₅ 15 kg and potassium as K₂O 20 kg. The recommended nutrient requirements per hectare are: - Maize: N 120 kg, P₂O₅ 60 kg, K₂O 80 kg - Soybeans: N 50 kg (but only 30 % of this must be supplied from fertilizer because the remaining 70 % is obtained by biological N₂ fixation), P₂O₅ 40 kg, K₂O 50 kg The farmer plans to allocate 3 ha to maize and 2 ha to soybeans.

Question Parts

( a )
Determine the total amount of each nutrient (N, P₂O₅ and K₂O) that must be supplied as fertilizer for the whole farm.
( b )
If the farmer decides to use a blended NPK fertilizer that contains 20 % N, 10 % P₂O₅ and 15 % K₂O (by weight), calculate the quantity of this blended fertilizer required to meet the deficits calculated in part (a).
( c )
Discuss two agronomic advantages of using a mixed cropping system of maize and soybeans on this farm.

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About This Question

This is Neco 2022 Agricultural Science Question 5. It is one of the essay questions from the 2022 Neco Agricultural Science examination.

The question covers Crop Production .

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