Waec Model Questions Vol1 2020 Geography Question 20

Practice objective / multiple choice question 20 from the 2020 Waec Model Questions Vol1 Geography examination.

Waec Model Questions Vol1 2020 Geography Objective / Multiple Choice Medium Difficulty
Question 20 WAEC_MODEL_QUESTIONS_VOL1 • 2020 • GEOGRAPHY • objective

A soil profile consists of three horizons: * A horizon: thickness 15 cm, organic matter 25 % (by weight). Organic matter holds water at 30 % of its weight. * B horizon: thickness 35 cm, clay 35 % (by weight). Clay holds water at 25 % of its weight. * C horizon: thickness 25 cm, sand 20 % (by weight). Sand holds water at 10 % of its weight. The field‑capacity requirement for arable crops is > 5 % water by weight, for forestry > 3 %, and for grazing > 2 %. Determine the overall field capacity of the profile (as a percentage by weight) and state the most suitable land‑use.

Answer Options

A. Overall field capacity ≈ 5.10 %; the profile is most suitable for forestry.
B. Overall field capacity ≈ 4.80 %; the profile is most suitable for grazing.
C. Overall field capacity ≈ 7.30 %; the profile is most suitable for arable agriculture.
Correct Answer D. Overall field capacity ≈ 6.25 %; the profile is most suitable for arable agriculture.
Correct Answer
D
Correct Option:
Overall field capacity ≈ 6.25 %; the profile is most suitable for arable agriculture.

About This Question

This is Waec Model Questions Vol1 2020 Geography Question 20. It is one of the objective questions from the 2020 Waec Model Questions Vol1 Geography examination.

Difficulty level: Medium .

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