Saline soils are characterized by:
A) high CaCO3 levels near the soil surface.
B) pH values of less than 8.5.
C) electrical conductivity of standard saturated paste of less than 4 dS/m.
D) low chloride and sulfate contents.
E) sodium adsorption ratios of 13 or higher.
B
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What opens the contact on the safety switch in Figure 54-25?
What will be an ideal response?
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