NREM 1200 Exam 2

According to Dr. Burras, soil is a non-renewable resource

true

According to your textbook, researchers have demonstrated that organic farming ______________

is equally, if not more profitable than conventional farming

Accelerated erosion is much more rapid than geological erosion.

true

Shelterbelts are to _____________ as terraces are to ________________

wind erosion; water erosion

Current annual average soil erosion rate in Iowa is ____________.

~ 5.6 tons/acre

Ideal soil for plant growth has

50% pores and 50% solids

Which of the following is true about soil rich in organic matter?

retains more water

has good nutrient retention

is well aerated

all of the above

Which of the following is NOT true for Green Revolution?

decreased per capita food production in Asia

According to your textbook, what are the pros of no-till farming?

soil erosion is generally reduced by 90%

labor may be reduced by 30-50%

soil retains more moisture

all of the above

Based on the lecture, which of the following is true for Iowa?

leads the nation in runoff soil erosion

Green manure is _____________.

fresh vegetation (dead plants, but not composted)

Which of the following is NOT true about humus?

decreases water-holding capacity of the soil

The O horizon is _______________.

primarily composed of organic materials

Based on Dr. Burras's lecture, what kills the plant the fastest?

poor gas exchange

Leaching and the rate of movement of water would be greatest in a soil classified as ________________.

sandy

The Conservation Reserve Program (CRP) pays farmers to ________________.

stop cultivating highly erodible cropland

The Green Revolution alleviated hunger in rural Africa.

false

What are STRIPs?

experimental plots in Iowa integrating prairie into farm fields

According to your textbook, a sustainable farming system must be not only profitable but socially responsible.

true

Between 1950 and 2017, the number of farms in the US _________________.

decreased dramatically

Question from pre-quiz on soil and agriculture. What is the percentage of all land surface currently used by agriculture (raising crops and livestock)?

38%

According to the documentary Kiss the Ground, the UN estimates that the world's remaining topsoil will be gone within _____ years.

60 years

_______% area of the U.S is covered by forests.

33%

Based on the lecture material, what is the current sustainability of wood resource in the US?

growth exceeds harvest by about 25-30%

According to your textbook, the National Park Service administers _____________.

parks

historical sites

monuments

all of the above

Which of the following agencies was established under the leadership of Gifford Pinchot to manage forests for "the greatest good of the greatest number in the long run"?

U.S. Forest Service

Green certification of the wood takes into account ____________.

wildlife habitat

quality of water

sustainability of the wood

all of the above

Which of the following is NOT true about the National Park Service?

uses taxes to subsidize the extraction of publicly held resources by private corporations

According to your textbook, genetically engineered trees have been proven to be safe for native ecosystems.

false

Clear-cutting ______________.

removes all trees from an area

What agencies manage federal Wilderness Areas?

Forest Service

National Park Service

Fish and Wildlife Service

all of the above

Which of the following is NOT true regarding tree monoculture?

appropriate for the shade-loving seedlings of timber-valuable species

Based on the lecture material, why do tree numbers decrease with age of the stand?

insects and diseases kill some trees

taller trees shade out shorter trees

wind and storms take out some trees

humans thin out some trees

all of the above

According to the video "Stop the Burning", globally there are ____________________ indigenous people who are sustained by the forests

60 million

Which of the following is TRUE about selective cutting?

reduces soil erosion compared with clear-cutting

The oldest national park in the US, established in 1872, is _______________.

yellowstone

According to the Multiple Use-Sustained Yield Act of 1960, national forests cannot be used for oil and gas leasing.

false

Who owns the most US forest land?

private landholders

Strip cutting depends on ______________

natural seeding

Which harvesting method creates an even-aged stand of sunlight-loving trees?

clear-cutting

Currently, oil palm is predominantly grown in _______________.

Indonesia and Malaysia

In Africa and South America forested areas are ___________.

decreasing

Question from pre-quiz on forests. What fraction of US land area is set aside as national parks?

3.5%