Gce Model Questions Vol1 2021 Agricultural Science Question 4
Practice essay / theory question 4 from the 2021 Gce Model Questions Vol1 Agricultural Science examination. This question covers Crop Nutrition, Fertilizer Recommendation .
Soil tests from a 1 ha maize field gave the following extractable nutrient levels: N = 45 kg ha⁻¹, P = 18 kg ha⁻¹, K = 30 kg ha⁻¹. The target yield is 6 t ha⁻¹ and the average nutrient removal rates are N = 20 kg t⁻¹, P = 5 kg t⁻¹ and K = 15 kg t⁻¹. The recommended fertilizer sources are urea (46 % N), single superphosphate (20 % P₂O₅ ≈ 9 % P) and muriate of potash (60 % K₂O ≈ 50 % K). Calculate the amount of each fertilizer (in kg ha⁻¹) required to meet the nutrient deficit, and justify why a balanced application is important for sustainable production.
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This is Gce Model Questions Vol1 2021 Agricultural Science Question 4. It is one of the essay questions from the 2021 Gce Model Questions Vol1 Agricultural Science examination.
The question covers Crop Nutrition, Fertilizer Recommendation .
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