Clay soils will usually have a higher cation exchange capacity than sandy soils because
A)clay particles have round surfaces that reduce surface area where positively charged particles can accumulate.
B)clay particles have round surfaces that reduce surface area where negatively charged particles can accumulate.
C)clay particles have elongated surfaces that support negative charges.
D)clay particles have elongated surfaces that support positive charges.

Question

Quizplus · Accepted Answer

Clay particles have elongated surfaces that support negative charges, which allows them to hold onto positively charged ions (cations) more effectively than sandy soils. This increases the cation exchange capacity of the soil.

Clay Soils Will Usually Have a Higher Cation Exchange Capacity