Waec Model Questions Vol1 2017 Agricultural Science Question 5
Practice objective / multiple choice question 5 from the 2017 Waec Model Questions Vol1 Agricultural Science examination.
A soil test of the top 15 cm of a field shows an available phosphorus (P) concentration of 12 mg kg⁻¹. The target P level for optimum maize production is 30 mg kg⁻¹. The soil bulk density is 1.3 g cm⁻³. The farmer intends to apply triple superphosphate (TSP) which contains 46 % P₂O₅ (equivalent to 20 % elemental P). Only 70 % of the applied P becomes available to the crop. How many kilograms of TSP per hectare should be applied to raise the soil P to the target level? Round your answer to the nearest kilogram.
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About This Question
This is Waec Model Questions Vol1 2017 Agricultural Science Question 5. It is one of the objective questions from the 2017 Waec Model Questions Vol1 Agricultural Science examination.
Difficulty level: Medium .
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