Silicate clay accumulation is most common in the _______ horizon

B

Illuvial horizon

B

Eluvial horizon

A,E

Silicate clay leaching is most common in the _____________ horizons

A,E

a three-dimensional unit that embodies the primary characteristics of an individual soil

soil pedon

The swelling/shrinking tendency of some silicate clay minerals is due primarily to

the movement of water molecules in and out of the interlayers of the crystal

Glacial parent material deposited in MS during the Pleistocene era consists of

Loess deposits

Argillic horizons are characterized by

accumulation of silicate clays

Secondary minerals are most prominent in the __________ fraction of soils.

clay

The negative charges associated with smectite clay crystals are due mostly to

Isomorphous substitution of Mg for Al in the octahedral sheet

Some soil colloids exhibit positive charges under highly acid conditions. To what are these charges likely due?

Protonation of some hydroxy groups by excess H+ ions

Among the soils of which order would you most likely find the highest buffering capacities?

Vertisols

Which of the landscape positions would have the greatest horizonation?

botttomland

Define CEC

the sum of exchangeable cations a soil can adsorb