To double the spray rate, the pressure has to be increased
a. considerably.
b. two times.
c. four times.
d. eight times.
Question 2Which of the following is (are) considered necessary features for an area to be delineated as a wetland?
A) shallow standing water
B) hydric soils
C) aquatic vegetation
D) organic soils
E) all of the above
Question 3Forest fires result in sufficiently high soil temperatures to cause the vaporization and movement of certain organic compounds in soils. The main effect of these compounds is to ________.
A) increase soil organic matter
B) increase pH
C) enhance soil structural stability
D) reduce water infiltration and percolation through the profile
E) decrease water losses by surface runoff
Question 4Igneous, sedimentary, and metamorphic are three ________.
A) master horizon names
B) processes of weathering
C) basic classes of soils
D) forms of minerals
E) types of rocks
Question 5The redox potential of a soil is -250 mV. Which of the following forms of the pertinent elements would you expect to find in the soil?
A) Fe2+ B) NO3- C) CO2 D) SO42- E) Mn4+
Question 6Which of the following processes are most apt to encourage good soil aeration?
A) diffusion of oxygen from the soil to the atmosphere
B) root respiration
C) reaction of oxygen with organic matter
D) creation of more macropores
E) organic matter decomposition
Quick Reply
