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ENVS 101 Exam 2 Questions with Correct Answers
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ENVS 101 Exam 2 Questions with Correct Answers
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ENVS 101 Exam 2 Questions with Correct Answerssoil horizons (top to bottom) Correct Answer-O horizon- Organic (litter
layer)
A horizon- Topsoil
E horizon- Eluviated (leaching layer)
B horizon- Subsoil
C horizon- Weathered parent material
R horizon- Rock (parent material)
Soil textures Correct Answer-Sand- 0.05 to 2 mm, feels gritty
Slit- 0.002 to 0.05 mm, feels smooth
Clay- less than 0.002 mm, feels sticky
Soil Structure Correct Answer-Determined by the shape clumps of soil
take when it is carefully broken apart. Each clump is called a ped, and
peds can be granular, blocky, prismatic or platy (look at slide for
diagram)
Soil Color Correct Answer-can be used to indicate the organic content
and fertility of a soil and/or the type of minerals and elements that are in
the soil (look at slide for diagram)
Traditional Agriculture Correct Answer-Farming crops was prepared by
human and animal muscle power, along with hand tools and simple
machines.
, Industrial Agriculture Correct Answer-The industrial revolution
introduced large-scale mechanization and fossil fuel combustion to
agriculture, just as it did to industry. Farmers replaced horses and oxen
with machinery that provided faster and more powerful means of
cultivating, harvesting, transporting, and processing crops
Sustainable Agriculture Correct Answer-Agriculture that maintains the
healthy soil, clean water, and genetic diversity essential to long-term
crop and livestock production
Agroecology Correct Answer-a scientific field that considers the area's
ecology and indigenous knowledge and favors agricultural methods that
protect the environment and meet the needs of local people
Soil Erosion Correct Answer-Movement of soil components, especially
topsoil, from one place to another, usually by wind, flowing water, or
both. This natural process can be greatly accelerated by human activities
that remove vegetation from soil.
Dust Bowl Correct Answer-In the late 1800s and early 1900s farmers
and ranchers grew wheat and grazed cattle. They removed native
grasslands which caused the 1930s drought and soil erosion from strong
winds occurred which brought "black blizzards" of soil
Practices to Conserve Soil Correct Answer-Crop rotation- farmers
alternate the type of crop grown in a given field from one season or year
to the next
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