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24 notecards = 6 pages (4 cards per page)

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Quiz 1 Envisci

front 1

If a soil has 30% sand, 40% silt, 30% clay; what's it's texture?

back 1

Clay Loam

front 2

True/False: All Loam soils have at least 3%
organic matter in them?

back 2

False bc organic matter doesn't affect texture

front 3

True/ False: All Loam soils have at least 8% clay in them.

back 3

True

front 4

Which soil order has permafrost?

back 4

Gelisols

front 5

Which soil order has a distinct eluviated horizon and is commonly found under evergreen forests?

back 5

Spodosols

front 6

Which soil order is commonly associated with extreme weathering and often lacks distinct horizons?

back 6

Oxisols

front 7

Take a chunk of moist soil that has a mass of 480g and after drying in the oven overnight it reaches a constant a mass of 420g. The total volume for this soil chunk is 300 cm3, what is the soil’s BD?

back 7

1.4 g/cm3

front 8

Take a chunk of moist soil that has a mass of 480g and after drying in the oven
overnight it reaches a constant a mass of 420g. The total volume for this soil chunk
is 300 cm3, what is the soil’s BD? After compacting the soil chunk, its resulting total volume is 280 cm3
What is the soil’s resulting BD?

back 8

1.5 g/cm3

front 9

Take a chunk of moist soil that has a mass of 480g and after drying in the oven overnight it reaches a constant a mass of 420g. The total volume for this soil chunk is 300 cm3, what is the soil’s BD? After compacting the soil chunk, its resulting total volume is 280 cm3 What is the soil’s resulting BD?
Imagine that the compacted soil is moistened and then has a mass of
460g. What is it’s BD now?

back 9

1.5 g/cm3

front 10

Assume that you have two soils: a loamy sand and a clay loam, both with the same bulk density. Which of these soils has more porosity?

back 10

Neither. They are the same

front 11

When a soil is compacted, what happens to its porosity?

back 11

It Decreases

front 12

When a soil is compacted, what happens to its particle density?

back 12

It Remains unchanged

front 13

If a soil contains 16% organic matter (based on dry weight), what
is its horizon designation?

back 13

A-horizon

front 14

Which horizon(s) is the “subsoil”?

back 14

B-horizon

front 15

Which horizon(s) is the “substratum”?

back 15

C-horizon

front 16

Which of the following biomes is/are NOT characterized by a
leaching environment where the ecosystem receives more precipitation
(in most years) than the vegetation requires, thus resulting in a soil
condition that is NOT leached?

back 16

Temperate Grassland

front 17

Which biome(s) tends to have soils with high levels of
accumulated salt due to the ecosystem having much higher evapo-
transpirative demand than precipitation it receives?

back 17

Temperate Desert

front 18

Which of the following sequences represents the correct order for
increasing levels of NPP?

back 18

boreal forest < temp. deciduous forest < tropical rainforest

front 19

Which parent material was deposited by moving, melt-water streams in front of the receding glacier?

back 19

Outwash

front 20

Which parent material is dense and poorly sorted?

back 20

Basal Till

front 21

Which diagnostic horizon is directly associated with an eluviated horizon?

back 21

Albic horizon

front 22

Which diagnostic horizon is directly associated with an accumulation of illuviated clay material?

back 22

Argillic horizon

front 23

Which diagnostic horizon is present when there is at least 8” (20 cm) of accumulated organic materials?

back 23

Histic Epipedon

front 24

What diagnostic subsurface horizon would you expect to find in an Inceptisol but not in an Entisol?

back 24

Cambic horizon