Land - Section Two - Food through Forests

get a hint

hint

beri beri

beri beri

disease due to lack of vitamin B

scurvy

disease due to lack of vitamin C

kwashiorkor

disease due to lack of protein

rickets

disease due to lack of vitamin D

organic agriculture

uses no synthetic fertilizers, insecticides, fungicides or herbicides, and relies on biological control for pests

boreal and tropical rain forests

most of the forests in the world are what kind?

sustainable agriculture

does not deplete the soil faster than it forms, maintains the amount and quality of soil and water, can be practiced far into the future

seeds are expensive and traits available are not what would help these regions

Why aren't GMOs prevalent in developing nations?

genetically modified organism

What do the letters GMO stand for?

food security

the guarantee of an adequate and reliable food supply for all people at all times

arable

Land that is suitable for farming is described as being what?

using recombinant DNA technology to combine DNA from multiple organisms

How are GMOs created?

30%

approximately how much of the Earth's land surface is covered by forests?

Canada, Brazil, Russia, Southern and Western US

most logging in the world currently occurs in what regions/countries?

water cycle

slowing runoff, reducing flooding, and purifying water through transpiration are all ways that forests contribute to the regulation of what?

single selection

single trees are cut, widely spaced from each other

clearcutting

all the trees in an area are cut at once; commonly used from 1950's - 1970's; most cost efficient method of timber harvesting

group selection

small patches of forests are cut

group selection and singe selection

timber harvesting that results in uneven-aged regrowth

shelterwood

small number of mature trees are left in place for seedlings

Theodore (Teddy) Roosevelt

Which US president set up the US Forest Service?

all fires extinguished immediately

What was the policy regarding forest fires in public lands for over 100 years?

malnutrition

a shortage of nutrients a body needs

1500 miles

How far does the average food product sold in a US supermarket travel between farm and shelf?

False

T or F: new GMO foods are dangerous for people to eat

False

T or F: Superpests have evolved that have resistance to GMO crops.

True

T or F: GMO genes have spread to wild plants through pollination.

False

T or F: GMOs with salinity and drought resistance are available for poor countries.

1850

most of the forests of the Eastern US were stripped by what year?

National Forest Management Act of 1976 and its modifications

What act/policy and its modifications include the following: decreased logging operations requires plans for renewable resource management limits the building of new roads in national forests emphasizes the use of science and conservation biology in creating new forest plans

advanced technology in machinery

Why is deforestation in developing nations happening at a far faster rate than ever before?

snags

dead, standing trees

controlled or prescribed burn

a fire that is set on purpose and under controlled conditions

consumer demand

Why are timber companies now producing wood and wood products that come from sustainable harvesting and forest management, even though it costs more?

conservation

What term is used today that got its current meaning from being used by Teddy Roosevelt, Gifford Pinchot, and John Muir?

reduce the fuel load of a forest

What is the primary purpose of a controlled or prescribed burn?

provide habitat maintain soil, air, and water quality play important roles in biogeochemical cycles

List 3 important jobs achieved by forests.

more fossil fuel energy used in agriculture; irrigation; pesticides; fertilizers; cultivating more land; more productive corp and livestock varieties; planting and harvesting more frequently

List several reasons why our ability to grow food has grown faster than the human population (since 1961).

rapid growth pest resistance frost tolerance herbicide resistance gaining certain characteristics of animal products (like medicine produced in milk)

List several different traits that are commonly desired/found in GMOs in developed countries.

some seeds don't germinate without burning first fire allows new growth to take place increases biodiversity by increasing plant species clears fuel load to prevent larger, more devastating fires

List several benefits of forest fires in maintaining forest health.