Question Bank • QB_EXP_SWCE_SOIL_001 NAT • 1 Mark

Section 4: Soil and Water Conservation Engineering

Soil Physical Properties & Phase Relationships

Subtopic: Porosity from void ratio

Question Statement:

A sample of agricultural soil has a void ratio of $e = 0.65$. The porosity of the soil sample is ________ $\%$ (round off to two decimal places).

Answer Key:

39.39

Step-by-Step Solution & Explanation

The relationship between porosity $n$ and void ratio $e$ is: $n = \frac{e}{1 + e}$ Given $e = 0.65$: $n = \frac{0.65}{1 + 0.65} = \frac{0.65}{1.65} = 0.3939$ In percentage: $n = 39.39\%$.
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