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NRES 255 Exam 1 Questions & answers

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  • July 4, 2024
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NRES 255 Exam 1

Two Indiana soils, one a residuum and one an alluvium would likely differ in which soil
forming factors? - ANS-Time and parent material

Loess is a common parent material for Midwestern soils. The most common surface
texture from loess is: - ANS-Silt Loam

Given the Munsell color notation, 10 YR 5/2: - ANS-10YR is the hue, 5 is the value, and
2 is the chroma

The taxonomic class of the Eastport soil series is a Mixed, frigic Spodic Udipsamments.
What is the soil order of this series? - ANS-Entisol

Heavy vehicle traffic on wet soils may cause soil - ANS-Bulk density to increase and a
platy structure to appear in the A horizon

A somewhat poorly drained soil is one that: - ANS-Has grey mottles above 18" in a
mostly brown background

______ describes soil particles which have formed into vertical pillars with rounded tops
and high sodium, separated by miniature, but definite, vertical cracks in the B horizon. -
ANS-Columnar

The Hobbit silt loam is a fine silty, mixed mesic Typic Fragiudalf. What is the suborder? -
ANS-Udalf

Which class of land in the Land Capability Class System describes a soil that has
moderate limitations or may require moderate conservation practices but is still suitable
for row crops such as corn and soybeans? - ANS-2 (II)

Given blocky, granular, massive, and platy, in what order would you expect to find these
structures in a well-drained forest soil profile (from top to bottom)? - ANS-granular, platy,
blocky, massive

The youngest soils in Indiana are found in which area? - ANS-Along the river floodplains

, Which of these are soil forming factors? - ANS-climate, topography, parent material,
time, and vegetation/biotic

As % pore space decreases, bulk density: - ANS-increases

Which soil texture has the lowest water holding (storage) capacity? - ANS-Sand

Cold temperatures (35 degrees F): - ANS-Increase organic matter accumulation

As soils are weathered, they do all of the following except: - ANS-become more basic
(base saturation increases)

Which of the following would you least expect to find in Indiana? - ANS-Umbriorthel

The tan/brown/red color in a mineral soils is caused by the - ANS-iron content

A soil which will form a strong ribbon and feels gritty (but less than 50% sand) would
most likely be a: - ANS-clay loam

Rank the following soil orders Alfisol, Entisol, Inceptisol, Oxisol, Ultisol, from youngest
(least weathered) to the oldest (most weathered): - ANS-Entisol, Inceptisol, Alfisol,
Ultisol, Oxisol

All of these soil orders are found in well drained forest soils except: - ANS-Mollisols

Given the textural triangle below, what is the soil texture for a soil containing 60% sand,
10% silt, and 30% clay? - ANS-Sandy Clay Loam

______ is the soil forming factor that causes soils to differ within the same catena -
ANS-Topography

Under the heading for each type of parent material are listed various transporting
agents. Select the letter of the answer which correctly indicated the correct set of
transporting agents for all parent materials - ANS-Lacustrine = water
Alluvium = water
Till = glaciers
Colluvium = gravity
Aeolian = wind

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