ENV 100T Wk 3 – WileyPLUS Week 3 Weekly Exam

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ENV 100T Wk 3 – WileyPLUS Week 3 Weekly Exam

The layer of soil rich in organic material but is subject to leaching is ___ or the ___.

 topsoil…A-horizon.

 subsoil…B-horizon.

 weathered parent material…C-horizon.

 litter…O-horizon.

The Conservation Reserve Program (CRP) is a voluntary subsidy program that pays farmers to stop producing crops on highly erodible farmland. Instead farmers are required to:

 strip crop native plants with grain crops on the erodible land

 plant native grasses or trees on the highly erodible land and then “retire” it from further use for 10 to 15 years

 develop and adopt a 5-year conservation plan for their farms that includes erosion-control measures, and if they do not comply, they lose federal agricultural subsidies such as price supports

 plant shelterbelts to reduce the impact of wind erosion

In mining, overburden refers to:

 the hill of loose rock created when the soil and rock from a new trench is put into the already excavated trench during strip mining.

 the mineral resources that are extracted from deep underground deposits.

 the soil and rock overlying a useful mineral deposit.

 the mineral resources that are extracted near Earth’s surface by first removing the soil, subsoil, and overlying rock strata.

A major problem with conservation tillage is:

 the soil becomes compact.

 soil erosion increases.

 it increases insect populations.

 it requires greater use of herbicides to control weeds.

Which of the following is NOT an environmental impact of mining?

 Eutrophication of waterways

 Groundwater depletion

 Soil erosion

 Acid mine drainage

The photo below BEST illustrates:

 a wildlife corridor

 a clear-cut

 rangeland

 tundra