The drainage class of a soil (the degree to which the soil becomes water-saturated during the year) can be judged by the presence and location of gley in the soil profile.
Indicate whether the statement is true or false
Question 2A soil pedon is ________.
A) a surface horizon used to characterize soil suborders and great groups
B) generally larger in area than a polypedon
C) a three-dimensional unit that embodies the primary characteristics of an individual soil
D) a category of Soil Taxonomy
E) a diagnostic subsurface horizon prominent in arid regions and in sandy parent materials.
Question 3The parent materials for most coastal plain soils are residual in nature.
Indicate whether the statement is true or false
Question 4Eluviation of clay, iron, and other materials is the principal process responsible for the formation of an E horizon.
Indicate whether the statement is true or false
Question 5Capillarity in soils ________.
A) involves both adhesion and cohesion
B) is not involved in the process of water uptake from soils
C) is independent of the matric potential in soils
D) is enhanced by the symmetrical nature of the water molecule
E) does not account for unsaturated water movement in soils
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