Chapter 3 HW

place the following levels of taxonomy in order from least specific to most specific

4-typic paleudult 2-udult 3-palcudult 1-ultisol

Which of the following diagnostic horizons would likely not restrict root growth in soils?

albic

a horizon designated as a Bt would likely have

an accumulation of clay

Which soil moisture regime has the highest soil moisture levels?

aquic

Which of the following subsurface diagnostic horizons would you expect to find in a soil in Tennessee?

argillic

in which of the following soil orders would recent alluvium most likely be a common parent material

entisols

Which of the following is an aridisol

fine-silty, mixed glassic haplogypsid

while investigating the soils of northern canada in summer, you dig a soil pit easily through fairly uniform peat material until, at 75 cm deep, your shovel hits a layer that is frozen solid. which type of soil are you most likely digging

histel

In which of the following epipedons is the organic matter level generally highest?

histic

if soils are to be used for crop production, for which soil order would land drainage be most critical

histosols

the two soils orders with low bulk densities that would be prone to soil erosion when dry are the

histosols and andsiols

you look up the soil series for the main soil type at your home. the classification is: loamy, kaolinitic, mesic, vertic eutrocrept. what is the soil order

inceptisol

Which of the following soil temperature regimes would provide the warmest and least variable soil temperature?

isohyperthermic

you look up the soil series for the main soil type at your home. the classification is: loamy, kaolinitic, mesic, vertic eutrocrept. what is the temperature regime

mesic

the main difference between an umbric epipedon and a mollic epipedon is

mollic has a base sat >50%, and umbric has a base saturation <50%

the two soil orders that are typical of the breadbaskets are the

mollisols and alfisols

In which of the following epipedons is the organic matter level generally the lowest?

ochric

soils in which of the following suborders would more likely occur in alaska than in texas

orthels

Which of the following subsurface diagnostic horizons would you expect to find in a highly weathered soil of the humid tropics?

oxic

which of the following describes a soil likely to contain a significant content of low activity clays

oxisol in central brazil

osmotic potential would likely be highest in soils of which of the following horizons

salic

Which of the following categories of soil taxonomy provides the greatest specificity of soil properties?

series

soils in this order are commonly sandy in texture, quite acidic and develop primarily under coniferous trees in cool to cold climates

spodosols

A soil has a thick black A horizon, a distinct B horizon, has reasonably stable soil strucuture, and was formed under grassland natural vegetation. Base saturation is >50% in all horizons. In which sbuborder is it mostly classified

udolls

you have a soil on your farm with a base saturation of 25%. it has an ochric epipedon and an argillic subsurface diagnostic horizon. which of the following would best describe this soil

ultisol

gilgai would be characteristic of

vertisol

the strong shrink-swell capability of clay soils predominantly composed of smectite makes these soils troublesome sites on which to build a home. in which soil order, would these soils be classified

vertisol