Question

Which of the following, for a given soil type, do not change with soil moisture? Check all that apply.

a- Bulk density

b- Mineral Density

c- Relative Saturation

d- Soil Porosity

Answer 1

Option B is correct.

Check -

a) as bulk density is given as ,.

As from formula it is clear that bulk Density is proportional to saturation. So, option a eliminated.

b)

Mineral density = mass of mineral grains / volume of mineral grain.

So, mass of minerals and mass of grains don't change with moisture content. Hence this option is correct.

C)

As relative saturation = volume of water/ volume of voids .

So, this option also eliminated.

d) porosity = volume of voids/ Total volume of soil.

The volume of voids would increase when saturation is greater than 1 or the soil in liquid flow condition.

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