Soil Color
What color is humus usually?
Dark brownish or blackish
Page 19
What are the three primary particle sizes?
Sand, silt, and clay
Page 21
In what order are the soil horizons from top to bottom?
O, A, E, B, C, R
Page 37
Which soil order is the most dominant in North Carolina?
Ultisols
Page 38
How many capability classes are there?
8
Page 41
Iron oxides usually give soil what colors?
Yellowish, brownish, or reddish color
Page 20
What is the process called when fertilizing lake and pond waters to the point where they are weed-choked lakes with undesirable trash fish?
Eutrophication
Page 22
Which horizon is bedrock?
R
Page 38
Whats the official book for classifying soils?
Soil Taxonomy
Page 38
How many capability subclasses are there and what are their abbreviations?
4; e, w, s, c
Page 41
What specific kind of chart do scientists usually use to judge the color of a soil?
Munsell Soil Color Chart (MSCC)
Page 19
What tool do scientists use to determine the named texture of a soil?
Soil Texture Triangle
Page 22
Which horizon is called topsoil?
A
Page 37
Which soil order is known for being dry and has the Latin word for dry inside it?
Aridisols
Page 38
What do the capability subclass abbreviations actually stand for?
e: erosive, w: wetness limitation, s: shallow or stony soil, c: climatic limitation
Page 41
What is it called if soil has a mottled gray look along with red, yellow, or brown colors?
Redoximorphic features
Page 20
Which of the three particle sizes is the smallest?
Clay
Page 21
Which horizon is called subsoil?
B
Page 37
Which soil order just means wood ash in Greek?
Spodosols
Page 38
Which capability classes are NOT suitable for cultivation?
V, VI, VII, VIII
Page 43
What can also develop during long periods of time in soil besides iron depletions or saturated soils?
Gray lined root channels start to develop in the soil
Page 20
What are the specific measurements of sand, silt, and clay?
Sand: 2.0-0.05 mm, Silt: 0.05-0.002 mm, Clay: <0.002 mm
Page 21
Which horizon is the transition layer between soil and parent material?
C
Page 37
What is the order of all the 12 soil order classifications from top of the list to bottom?
Alfisols, Andisols, Aridisols, Entisols, Gelisols, Histosols, Inceptisols, Mollisols, Oxisols, Spodosols, Ultisols, Vertisols
Page 38
Which capability class has severe limitations that restrict the choice of plants or requires very careful management, or both?
Class IV