The cation exchange capacities of alkaline soils are generally higher than those of acid soils (Vertisols excepted). Which of the following characteristics of alkaline soils most likely accounts for this high CEC?
A) high exchangeable calcium
B) high content of 2:1 type clays
C) high exchangeable sodium content
D) high humus content
E) high content of hydrous oxides of iron and aluminum
B
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Two technicians are discussing how to test a car's exhaust by holding a small piece of paper within an inch of the tailpipe mouth. Technician A says that if the paper is vibrating due to a "puffing" output from the tailpipe, this signals a smoothly running engine. Technician B says that if the paper is being drawn toward the tailpipe, this could indicate burned exhaust valves. Who is correct?
A. Technician B B. Both Technicians A and B C. Technician A D. Neither Technicians A or B
All of the following are types of retaining rings EXCEPT:
A. spiral types. B. snap rings. C. pop rivets. D. lock rings.
Given the circuit in Fig. 2.101 and that the resistance, Req, looking into the circuit from the left is equal to 100 ?, determine the value of R?.
 FIGURE 1.png)
Which region of Europe provides most of the continent’s illegal and forced sex workers?
a. eastern Europe b. Scandinavia c. Spain and Portugal d. Belgium and Holland