Activity V
1. Explain the difference in the terms, pedon, soil series, and polypedon.
2. List the five soil forming factors and circle those that are active, place a box around those that are passive; time is neutral?
3. Give the name and description of each soil master horizon represented by each of the following symbols.
(See the glossary in the text)
O
A
E
B
C
R
4. Identify the following common soil horizon subscripts.
k p
g t
s x
m h
What are the two meanings of "2"
5. As water flows downward through a developing soil, the following four
types of changes occur. Give
three examples of each (see text, pp49-50).
1. additions 2. losses 3. transfers 4. transformations
a. OM a. a. a. sand to clay
b. b. nutrients b. b.
c.
c. c.salt c.
6. Give the distinguishing characteristics of each of the 12 soil orders.
The 12 Soil Orders: (See Ch. 4 in the text, between PP 114-115
and plates on soil orders) You may also go to
the following location on the net to see photos and descriptions of the
SOIL ORDERS.
Entisols (Soils with
a minimum of pedogenic (developed) horizons, these
soils are commonly found along river flood plains. They are referred to as new soils)
Inceptisols
Mollisols
Alfisols
Ultisols
Oxisols
Spodosols
Vertisols
Histosols
Aridisols
Andisols
Gelisols