Soils Final

Question 1

Alfisols

Answer 1

argillic, kandic, or natric horizon with clay skin

Question 2

Andisols

Answer 2

andic properties -> low density, glass, pumice

Question 3

Aridisols

Answer 3

Aridic, with B or salic horizon

Question 4

Entisols

Answer 4

Little profile development

Question 5

Gelisols

Answer 5

Cryoturbation within 100 cm, permafrost within 2m

Question 6

Histosols

Answer 6

Organic soil except gelic groups

Question 7

Inceptisols

Answer 7

Some but few profile features. Drains quickly.

Question 8

Mollisols

Answer 8

Mollic epipedon, >50% base saturation to 1.8m. Temperate grasslands with a rich humus layer.

Question 9

Oxisols

Answer 9

Oxic horizon within 1.5m

Question 10

Spodosols

Answer 10

Spodic horizon within 2m, without andic properties

Question 11

Ultisols

Answer 11

Argillic, kandic, or natric horizon, base saturation <35%

Question 12

Vertisols

Answer 12

> 30% clay to 50 cm in depth with shrinking/swelling properties

Question 13

what is Catena?

Answer 13

The hillslope complex which leads to different characteristics based on hillslope position such as soil depth, texture, and mineral content.

Question 14

How much of GPP does the rhizosphere account for?

Answer 14

Up to 40% in terrestrial systems

Question 15

Anthropic

Answer 15

Human made mollic horizon with high P

Question 16

Folistic

Answer 16

Infrequently flooded organic horizon

Question 17

Plaggen

Answer 17

Human made high humus horizon by manure application

Question 18

Mollic

Answer 18

> 0.6% organic c

Question 19

Umbric

Answer 19

Base saturation <50%

Question 20

Ochric

Answer 20

Too thin/too little C

Question 21

Melanic

Answer 21

Very dark >6% C very low density

Question 22

Histic

Answer 22

Peat or muck layer of 20-30cm thick