CWD Field Survey & Data Collection 2

Question 1

Which tool is most commonly used to collect soil cores during a routine wetland field survey?

Accepted Answer

Soil probe or hand auger

Answer

A soil probe or hand auger is the standard tool for collecting soil cores in routine wetland determinations because it minimizes disturbance and allows efficient profile examination.

Question 2

When recording Munsell soil color, the notation '10YR 4/2' represents which three components in order?

Accepted Answer

Hue 10YR, Value 4, Chroma 2

Answer

Munsell notation always lists Hue first (e.g., 10YR), then Value (lightness), then Chroma (color intensity), separated by a slash.

Question 3

In the field, Munsell color readings for hydric soil assessments should be taken under which condition?

Accepted Answer

Moist (field-moist condition)

Answer

Munsell colors must be read on moist soil because drying significantly lightens the color and would produce inaccurate chroma and value readings used for hydric soil indicators.

Question 4

Which of the following is a redoximorphic depletion feature used to identify hydric soils?

Accepted Answer

Gleyed matrix with low chroma gray or greenish colors

Answer

A gleyed matrix reflects iron reduction and removal under prolonged anaerobic conditions, producing low-chroma gray or blue-green colors that indicate hydric soil conditions.

Question 5

According to Corps of Engineers Regional Supplements, the standard depth to which soil profiles should be examined during a wetland determination is:

Accepted Answer

18 inches

Answer

Regional Supplements generally require soil examination to a depth of at least 18 inches or to a restrictive layer, whichever is shallower, to adequately assess hydric soil indicators.

(CWD) Certified Wetland Delineator Practice Test

(CWD) Certified Wetland Delineator Practice Test

CWD Field Survey & Data Collection 2