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

Clay Loam

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

False bc organic matter doesn't affect texture

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

True

Which soil order has permafrost?

Gelisols

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

Spodosols

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

Oxisols

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?

1.4 g/cm3

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?

1.5 g/cm3

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?

1.5 g/cm3

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?

Neither. They are the same

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

It Decreases

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

It Remains unchanged

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

A-horizon

Which horizon(s) is the “subsoil”?

B-horizon

Which horizon(s) is the “substratum”?

C-horizon

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?

Temperate Grassland

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?

Temperate Desert

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

boreal forest < temp. deciduous forest < tropical rainforest

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

Outwash

Which parent material is dense and poorly sorted?

Basal Till

Which diagnostic horizon is directly associated with an eluviated horizon?

Albic horizon

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

Argillic horizon

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

Histic Epipedon

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

Cambic horizon