Neco 2021 Agricultural Science Question 2
Practice practical question 2 from the 2021 Neco Agricultural Science examination. This question covers Particle size analysis, Soil texture classification, Water holding capacity .
A soil sample taken from a cultivated field is analysed for particle‑size distribution using the hydrometer method. The following data were recorded after temperature correction and dispersing‑agent adjustment: - Oven‑dry soil mass weighed: 50.0 g - Hydrometer reading at 40 s (sand fraction): 30.0 g L⁻¹ - Hydrometer reading at 2 min (sand + silt fraction): 20.0 g L⁻¹ - Hydrometer reading at 5 min (sand + silt + clay fraction): 8.0 g L⁻¹ - Specific gravity of soil particles: 2.65 - Density of water at 20 °C: 1.00 g cm⁻³ - Hydrometer calibration factor: 1.0 (no correction needed) Assume the hydrometer cylinder volume is exactly 1 L and that the dispersing agent adds negligible mass. Answer the following:
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This is Neco 2021 Agricultural Science Question 2. It is one of the practical questions from the 2021 Neco Agricultural Science examination.
The question covers Particle size analysis, Soil texture classification, Water holding capacity .
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