12 soil orders

Question 1

Alfisols

Answer 1

Found in: Oklahoma (OK)
•topsoil is gray brown or brown
•formed under temperate deciduous forests
•high level of nutrients in topsoil

Question 2

Andisols

Answer 2

Found in: northwestern US
•volcanic glass content
•strongly weathered soil

Question 3

Aridisols

Answer 3

Found in: Nevada (NV), New Mexico (NM)
•little leaching
•form in arid regions
•not much organic matter to replace nutrients

Question 4

Entisols

Answer 4

Found in: Almost everywhere, steep and rocky settings, river valleys
•sandy
•no evidence of horizon development

Question 5

Gelisols

Answer 5

Found in: Alaska (AK)
•have permafrost
•organic layer has evidence of frost burn or seasonal thaw layer

Question 6

Histosols

Answer 6

Found in: Louisiana (LA), Florida (FL), northern Minnesota (MN), Wisconsin (WI), and Michigan (MI)
•found in bogs, peat
•predominately organic
•formed in waterlogged areas

Question 7

Inceptisols

Answer 7

Found in: New England and Appalachian Mts.
•small amounts of organic matter
•weathering is minimal
•earliest soil horizon development

Question 8

Mollisols

Answer 8

Found in: eastern Oklahoma (midwest)
•found in temperate grasslands
•high levels of humus
•fertile w/ thick, dark brown topsoil

Question 9

Spodosols

Answer 9

Found in: upper New England, upper Michigan (MI), and South Carolina (SC)
•form under coniferous trees
•not suited for agriculture

Question 10

Oxisols

Answer 10

Found in: Hawaii (HI)
•found in hot, wet, tropical regions
•nearly featureless
- stable, highly weathered, highly oxidized subsurface horizons.

Question 11

Ultisols

Answer 11

Found in: Georgia (GA), Alabama (AL), South Carolina (SC) 
•lack of litter 
•low in nutrients
•found in humid, wet areas
-highly weathered
-red or reddish-yellow acid soil

Question 12

Vertisols

Answer 12

Found in: Australia
•high clay content
•deep, wide cracks
•shrink when dry, swell when wet