Soil 1-10

Question 1

A soil profile is:

Answer 1

Vertical view of the layers of soil from the surface down to the unaltered parent material and used in classifying soils.

Question 2

Soil profile usually consists of:

Answer 2

Number of different soil layers or horizons with different properties.

Question 3

Soil sampling divided into two classes:

Answer 3

Targeted sampling

Random sampling

Question 4

Random sampling is:

Answer 4

Used when there is an absence of obvious features at or around the location of interest.

Question 5

Targeted sampling is:

Answer 5

Localized areas where distinguishing features are evident in soil (i.e. shoe print).

Question 6

Why soil is a good sample in forensics:

Answer 6

• Soil has high probability of transfer and retention.
• Soil is nearly invisible (fine particles).
• Soil can be quickly collected and separated.
• Soil can be easily characterized.
• Capacity for computerized soil database.

Question 7

Samples should be:

Answer 7

Sufficient (adequate) and representative of possible variations.

Question 8

Spatial scale is:

Answer 8

Geographical extent of an area.

Question 9

Spatial resolution is:

Answer 9

Resolution or spacing for a sampling strategy.

Question 10

Two international soil classification systems:

Answer 10

1. World Reference Base (WRB)

2. Soil Taxonomy