Neco 2020 Geography Question 23

Practice objective / multiple choice question 23 from the 2020 Neco Geography examination.

Neco 2020 Geography Objective / Multiple Choice Medium Difficulty
Question 23 NECO • 2020 • GEOGRAPHY • objective

A soil profile consists of three horizons each 30 cm thick. Horizon A has a bulk density of 1.3 g·cm⁻³ and a field capacity of 24% (by weight). Horizon B has a bulk density of 1.4 g·cm⁻³ and a field capacity of 18%. Horizon C has a bulk density of 1.5 g·cm⁻³ and a field capacity of 12%. Assuming the soil is initially dry, calculate the amount of water (in millimetres) that can be retained in each horizon after a rainfall that fully wets the profile to field capacity. Which horizon retains the greatest amount of water?

Answer Options

A. Horizon A: 54.0 mm; Horizon B: 75.6 mm; Horizon C: 93.6 mm; Horizon C retains the most water.
Correct Answer B. Horizon A: 93.6 mm; Horizon B: 75.6 mm; Horizon C: 54.0 mm; Horizon A retains the most water.
C. Horizon A: 93.6 mm; Horizon B: 75.6 mm; Horizon C: 54.0 mm; Horizon B retains the most water.
D. Horizon A: 90.0 mm; Horizon B: 78.0 mm; Horizon C: 55.0 mm; Horizon B retains the most water.
Correct Answer
B
Correct Option:
Horizon A: 93.6 mm; Horizon B: 75.6 mm; Horizon C: 54.0 mm; Horizon A retains the most water.

About This Question

This is Neco 2020 Geography Question 23. It is one of the objective questions from the 2020 Neco Geography examination.

Difficulty level: Medium .

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