front 1 Silicate clay accumulation is most common in the _______ horizon | back 1 B |
front 2 Illuvial horizon | back 2 B |
front 3 Eluvial horizon | back 3 A,E |
front 4 Silicate clay leaching is most common in the _____________ horizons | back 4 A,E |
front 5 a three-dimensional unit that embodies the primary characteristics of an individual soil | back 5 soil pedon |
front 6 The swelling/shrinking tendency of some silicate clay minerals is due primarily to | back 6 the movement of water molecules in and out of the interlayers of the crystal |
front 7 Glacial parent material deposited in MS during the Pleistocene era consists of | back 7 Loess deposits |
front 8 Argillic horizons are characterized by | back 8 accumulation of silicate clays |
front 9 Secondary minerals are most prominent in the __________ fraction of soils. | back 9 clay |
front 10 The negative charges associated with smectite clay crystals are due mostly to | back 10 Isomorphous substitution of Mg for Al in the octahedral sheet |
front 11 Some soil colloids exhibit positive charges under highly acid conditions. To what are these charges likely due? | back 11 Protonation of some hydroxy groups by excess H+ ions |
front 12 Among the soils of which order would you most likely find the highest buffering capacities? | back 12 Vertisols |
front 13 Which of the landscape positions would have the greatest horizonation? | back 13 botttomland |
front 14 Define CEC | back 14 the sum of exchangeable cations a soil can adsorb |