Gce Model Questions Vol1 2025 Agricultural Science Question 2

Practice essay / theory question 2 from the 2025 Gce Model Questions Vol1 Agricultural Science examination. This question covers Soil Physical Properties, Field Capacity, Laboratory Techniques .

Gce Model Questions Vol1 2025 Agricultural Science Essay / Theory
Topics: Soil Physical Properties Field Capacity Laboratory Techniques
Question 2 GCE_MODEL_QUESTIONS_VOL1 • 2025 • AGRICULTURAL_SCIENCE • essay

A student carries out a laboratory experiment to determine the field capacity of a loamy soil sample using the apparatus shown.

Question Parts

( a )
Describe the step‑by‑step procedure the student should follow to obtain a reliable measurement of field capacity, including how to ensure the soil reaches field capacity before the final weighing.
( b )
The following data were recorded: - Dry weight of soil: 250 g - Weight of soil after saturation (immediately after water addition): 420 g - Weight of soil after 30 min drainage (field capacity): 380 g Calculate the field capacity of the soil expressed as a percentage of its total water‑holding capacity (the difference between saturated weight and dry weight).
( c )
Identify two possible sources of error in this experiment and suggest a method to minimise each error.
( d )
Explain how the field capacity value you obtained would influence irrigation scheduling for a maize crop in a semi‑arid region.

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About This Question

This is Gce Model Questions Vol1 2025 Agricultural Science Question 2. It is one of the essay questions from the 2025 Gce Model Questions Vol1 Agricultural Science examination.

The question covers Soil Physical Properties, Field Capacity, Laboratory Techniques .

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