AGN 215 Exam 1 questions and
answers already passed
Soil - correct answer ✔✔the complex mixture of loose material including minerals, organic and
inorganic compounds, living organisms, air, and water found at teh earth's surface and capable
of supporting plant life
Bulk density - correct answer ✔✔Less than particle density
massive soil structure - correct answer ✔✔Occurs with fine soils when the particles adhere
together into a solid mass
granular soil structure - correct answer ✔✔Soil particles are grouped in spherical peds with
indistinct sides
plate-like soil structure - correct answer ✔✔E horizon, may occur in any part of the profile.
subangular blocky soil structure - correct answer ✔✔A horizon, subject to wide and rapid
changes.
angular blocky soil structure - correct answer ✔✔The peds are shaped like blocks with
approximately equal measurement on each side
hue - correct answer ✔✔The chromatic gradation (rainbow) of light that reaches the eye
(in soils is usually redness or yellowness)
chroma - correct answer ✔✔The relative purity, strength, or saturation of a color or
, brightness
0=gray
value - correct answer ✔✔The lightness or darkness of a color in relation to a scale ranging from
white to black.
Pedon - correct answer ✔✔smallest unit of soil that represents all the characteristics and
variability used for classification
Soil texture - correct answer ✔✔refers to the size of individual soil particles and is determined
by the proportions of particle sizes in the soil
Sand, silt, clay - correct answer ✔✔three components of soil
Regolith - correct answer ✔✔the layer of unconsolidated rocky material covering bedrock
Marbel - correct answer ✔✔compressed limestone
Soil structure - correct answer ✔✔The shape and arrangement of aggregates give soils a
characteristic structure, e.g. blocky, platy or prismatic
Soil horizon - correct answer ✔✔The layer of soil that differs in color and texture from the layers
above or below it.
Soil profile - correct answer ✔✔All the vertical layers or horizons that make up a soil in a
particular place
answers already passed
Soil - correct answer ✔✔the complex mixture of loose material including minerals, organic and
inorganic compounds, living organisms, air, and water found at teh earth's surface and capable
of supporting plant life
Bulk density - correct answer ✔✔Less than particle density
massive soil structure - correct answer ✔✔Occurs with fine soils when the particles adhere
together into a solid mass
granular soil structure - correct answer ✔✔Soil particles are grouped in spherical peds with
indistinct sides
plate-like soil structure - correct answer ✔✔E horizon, may occur in any part of the profile.
subangular blocky soil structure - correct answer ✔✔A horizon, subject to wide and rapid
changes.
angular blocky soil structure - correct answer ✔✔The peds are shaped like blocks with
approximately equal measurement on each side
hue - correct answer ✔✔The chromatic gradation (rainbow) of light that reaches the eye
(in soils is usually redness or yellowness)
chroma - correct answer ✔✔The relative purity, strength, or saturation of a color or
, brightness
0=gray
value - correct answer ✔✔The lightness or darkness of a color in relation to a scale ranging from
white to black.
Pedon - correct answer ✔✔smallest unit of soil that represents all the characteristics and
variability used for classification
Soil texture - correct answer ✔✔refers to the size of individual soil particles and is determined
by the proportions of particle sizes in the soil
Sand, silt, clay - correct answer ✔✔three components of soil
Regolith - correct answer ✔✔the layer of unconsolidated rocky material covering bedrock
Marbel - correct answer ✔✔compressed limestone
Soil structure - correct answer ✔✔The shape and arrangement of aggregates give soils a
characteristic structure, e.g. blocky, platy or prismatic
Soil horizon - correct answer ✔✔The layer of soil that differs in color and texture from the layers
above or below it.
Soil profile - correct answer ✔✔All the vertical layers or horizons that make up a soil in a
particular place
