Smectite and vermiculite are more prominent in extremely weathered soils than in soils where only ...

Smectite and vermiculite are more prominent in extremely weathered soils than in soils where only modest weathering has occurred.
 
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Question 2

Of the silicate clays, smectite has the least tendency to expand upon wetting and shrink upon drying.
 
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Question 3

While kaolinite particles are larger than those of other major silicate clays, the surface area of kaolinite per kilogram is much smaller than that of the 2:1 type minerals.
 
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Question 4

The primary source of charge for 2:1 type clay minerals is ionization of the surface hydroxyl groups on the tetrahedral sheets.
 
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Question 5

Effective chemical control of any turfgrass pest involves applying the pesticide at the right time. What are the other four rights?
 
  What will be an ideal response?

Question 6

Vermiculite and associated silicate clays have a net electropositive charge in slightly acid soils.
 
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Question 7

The leaf-like structure of silicate clays involves two kinds of horizontal sheets, one dominated by a plane of silicon atoms, the other by a plane of aluminum and/or magnesium.
 
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