Gce Model Questions Vol1 2018 Agricultural Science Question 3

Practice essay / theory question 3 from the 2018 Gce Model Questions Vol1 Agricultural Science examination. This question covers Soil Fertility, Nutrient Management .

Gce Model Questions Vol1 2018 Agricultural Science Essay / Theory

Topics: Soil Fertility Nutrient Management

Question 3 GCE_MODEL_QUESTIONS_VOL1 • 2018 • AGRICULTURAL_SCIENCE • essay

A soil test of a field intended for maize production gave the following results: pH 5.5, organic matter 2 %, available phosphorus 12 mg kg⁻¹ and potassium 150 mg kg⁻¹. The recommended fertiliser rates for maize are 120 kg N ha⁻¹, 60 kg P₂O₅ ha⁻¹ and 80 kg K₂O ha⁻¹. A commercial NPK fertiliser containing 15 % N, 15 % P₂O₅ and 15 % K₂O is to be used.

Question Parts

( a )

Convert the recommended P₂O₅ and K₂O rates to the equivalent elemental phosphorus (P) and potassium (K) required per hectare.

( b )

Determine the amount of the 15‑15‑15 fertiliser that must be applied per hectare to meet the nitrogen requirement, and state whether the phosphorus and potassium requirements are also satisfied by this amount.

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About This Question

This is Gce Model Questions Vol1 2018 Agricultural Science Question 3. It is one of the essay questions from the 2018 Gce Model Questions Vol1 Agricultural Science examination.

The question covers Soil Fertility, Nutrient Management .

View More Gce Model Questions Vol1 2018 Agricultural Science Questions More Gce Model Questions Vol1 Practice Questions Back to Questions

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