Neco Model Questions Vol1 2022 Agricultural Science Question 5

Practice essay / theory question 5 from the 2022 Neco Model Questions Vol1 Agricultural Science examination. This question covers Crop Production .

Neco Model Questions Vol1 2022 Agricultural Science Essay / Theory
Topic: Crop Production
Question 5 NECO_MODEL_QUESTIONS_VOL1 • 2022 • AGRICULTURAL_SCIENCE • essay

A farmer intends to establish a 2‑hectare field for the production of maize and soybean in a mixed cropping system. Soil analysis shows pH 5.2, organic matter 1.5 %, available P 8 mg kg⁻¹ and K 120 mg kg⁻¹. The farmer targets yields of 5 t ha⁻¹ for maize and 2.5 t ha⁻¹ for soybean. Recommended fertilizer rates are: for maize – N 120 kg ha⁻¹, P₂O₅ 60 kg ha⁻¹, K₂O 40 kg ha⁻¹; for soybean – N 20 kg ha⁻¹, P₂O₅ 30 kg ha⁻¹, K₂O 20 kg ha⁻¹. To raise the soil pH to 6.5, the lime requirement is 2 t ha⁻¹ for each 0.5 unit increase in pH. Maize will occupy 60 % of the field and soybean 40 %.

Question Parts

( a )
Calculate the total amount of lime required for the whole 2‑hectare field.
( b )
Determine the total quantity of each fertilizer nutrient (N, P₂O₅, K₂O) required for the whole field, applying the given rates proportionally to the cultivated area of each crop.
( c )
Discuss two agronomic advantages of integrating soybean as a legume component in the maize field.

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About This Question

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

The question covers Crop Production .

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