Do you think that the pH of soil is influenced by agricultural practices such as
tilling and the application of agricultural chemicals? Explain your answer.
What will be an ideal response?
Applications of chemicals to the soil can affect soil pH. Because most of the chemicals
used in agriculture tend to be water-soluble, the effects of these chemicals tend to be
short-term. The application of large amounts of organic mulch can have a more longlasting
(several months to a year or more depending on climate and soil type) effect on soil pH because it takes longer for the mulch to decompose completely. Tillage
practices can have an effect on soil pH. If the roots of crops remain in the soil, a
larger amount of organic matter is added to the soil each season. If the remnants of
the previous season's crops are incorporated into the soil, the pH of the topsoil can
be altered. If the field is not properly plowed and the topsoil is lost, the soil pH will
tend to decrease. Your students should think about the kinds of crops planted in
their area (are the plants naturally acidic?), the local soil type, and temperature and
rainfall patterns in their area when preparing their answer
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Which of the following was NOT among prominent African-American cultural figures of the 1920s?
A. Joseph "King" Oliver B. Ralph Ellison C. "Jelly Roll" Morton D. Langston Hughes E. W.C. Handy
List three of the five basic types of tolerances.
What will be an ideal response?
Technician A says that lubrication guides provide information on the specified oil and lubricants needed along with the capacities and the location of lubrication points. Technician B says that factory service manuals or electronic service information include information that is very generic in nature not very detailed. Which technician is correct?
A) Technician A B) Technician B C) Both A and B D) Neither A nor B
The pulley should be changed when the the V-belt has dropped ____ into the pulley.
A. 1/32 inch B. 1/16 inch C. 1/8 inch D. 1/2 inch