Man-Induced Soil Erosion Flashcards
How much soil was lost from the South Carolina Piedmont?
7 inches
5 inches
8 inches
5.5 inches
9.5 inches
9.5 inches
“Erosive land use”, the concept used by Trimble, describes the effect of vegetative cover or cropping system on vulnerability to erosion?
True
False
True
Compared to row crops grown without conservation practices, the erosion under the native forest cover before European settlement was approximately.
one-tenth (10 %) of that under row crops without conservation practices
one one-hundredth (1 %)
one-fifth (20 %)
one-fiftieth (2 %)
one five hundredth (0.2 %)
one five hundredth (0.2 %)
Evidence that little soil erosion occurred prior to European settlement were?
accounts of clear, transparent streams reported during early colonial period
dark uniform texture bottomlands indicate stable conditions and lack of deposition of sediment loads
knowledge that erosion rates of well-vegetated or undisturbed soil are minimal
all of the above
none of the above
all of the above
According to Trimble, the volume of soil lost from Piedmont due to soil erosion was?
6000 cubic feet
600 cubic yards
1 cubic mile
6 cubic miles
60 cubic miles
6 cubic miles
The average depth of soil lost due to man-induced erosion across the Piedmont was?
5 inches
7 inches
2 inches
4 inches
10 inches
7 inches
How much soil was loss due to man-induced erosion in the Alabama Piedmont?
7 inches
5 inches
8 inches
9.5 inches
2 inches
7 inches
Land was cleared, cropped without conservation practices and then abandoned when it was no longer productive because the price of land was expensive relative to labor and because there was a shortage of land farther west.
True
False
False
The rotation in Colonial Virginia followed what order?
1) Began with 3-5 years of ___
2) Followed by ___
3) Ended by ___
1) Tobacco
2) Corn
3) Broomsedge thickets and gullies
Corn was considered less exhausting to the land than tobacco because it was grown on steeper slopes and cultivated with poorer techniques.
True
False
False
One of the reasons that corn cultivation was considered so bad was because of “checking,” which consisted of first plowing across the slope, then up and down the slope, leaving the soil exposed and susceptible to gully formation.
True
False
True
What river was described as a torrent of blood due to the heavy sediment load during a flood of 1779?
Savannah River
Chattahoochee River
Tallapoosa River
James River
Cahaba River
James River
The cotton gin resulted in the clearing of land for cotton at a faster rate than the clearing of land for tobacco.
True
False
True
By 1860, the most erosive land use in the Piedmont was in which state?
Alabama
Georgia
South Carolina
North Carolina
Virginia.
Georgia
Identify the incorrect statement concerning Erosive Land Use (ELU) in 1880
the largest area with the highest percentage of erosive land use was concentrated in South Carolina and eastern Georgia
in South Carolina, the area of the highest ELU in 1880 was south of the area with the highest ELU in 1860
The highest percentage of abandoned farms in 1880 was in roughly the same area with the highest ELU in 1860.
Soil erosion and loss of productivity was the cause of abandoned farmland in Piedmont
in South Carolina, the area of highest ELU in 1880 was south of the area with highest ELU in 1860
