Which of the following explains why clay-rich soils are less permeable than sandy soils?
A. clay particles are electrically charged and very small.
B. clay soils have greater porosity.
C. pores spaces of clay soils become plugged with sand grains.
D. sandy soils tend to form in areas with abundant rainfall.
E. sandy soils have greater vegetation cover.
Answer: A
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____________________ in the nucleus. Fill in the blank(s) with the appropriate word(s).
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