Undisturbed soil samples are required for conducting

Explanation:

There are two main types of a soil sample that is collected for the study of the properties of soils:

1. Disturbed Soil Samples:

• During the sampling process of the soil sample If the natural structure of the soil gets disturbed, then this type of soil sample is called a Disturbed Soil Sample.
• The disturbed Soil Samples can be used for the determination of the grain size, plasticity characteristics, and specific gravity of the soil.
• These samples are collected by different methods such as Auger Boring, Wash Boring, Rotary Drilling, and Percussion Drilling.

2. Undisturbed Soil Samples:

• During the sampling process of the soil sample, if the natural structure of the soil and water content does not disturb, that means the soil retained its natural structure and water content, then these types of soil samples are called undisturbed soil samples.
• The undisturbed soil samples are used for the determination of engineering properties of soils such as shear strength, consolidation test, permeability, and compressibility.
• The undisturbed soil samples are collected by Thin-walled samplers.