Agriculture

Question 1

Desertification

Answer 1

conversion of productive land to desert

Question 2

Causes of Desertification

Answer 2

overgrazing, deforestation, adverse soil erosion, poor drainage of irrigated land, overuse of water supplies

Question 3

Symptoms of Desertification

Answer 3

declining groundwater table, salinization of soil and near-surface water, reduction in surface water of streams, ponds, and lakes, unnaturally high rates of soil erosion, damage to native vegetation

Question 4

Traditional Subsistence Agriculture

Answer 4

just enough food for person’s family

Question 5

Slash and burn

Answer 5

vegetation cut and burned down before being planted

Question 6

Salinization

Answer 6

repeated irrigation forces soil salts to the top

Question 7

GMOs

Answer 7

can add nutrients and vitamins to plants, increase crop yield, cause deformities if bred with native species

Question 8

Monoculture

Answer 8

planting one crop

Question 9

Plantation farming

Answer 9

uses monoculture cash crops

Question 10

Deforestation

Answer 10

removing trees for agriculture, or selling as lumber

Question 11

Old growth forest

Answer 11

never cut, growing for hundreds of years

Question 12

Second growth forests

Answer 12

cutting has occurred, new forest grew naturally

Question 13

Clear-cutting

Answer 13

removing all trees

Question 14

Selective cutting

Answer 14

removing some trees

Question 15

Agroforestry

Answer 15

trees and crops planted together

Question 16

Overgrazing

Answer 16

animals eat grass faster than it grows (Tragedy of the Commons)

Question 17

Solution to overgrazing

Answer 17

rotate animals on different fields or control herd numbers

Question 18

70% of grain in Us is eaten by ____.

Answer 18

animals

Question 19

A source of water pollution is _______.

Answer 19

animal waste

Question 20

_____ is necessary for the health of forests.

Answer 20

Surface fires

Question 21

Conservation

Answer 21

management of resource so it can regenerate

Question 22

Preservation

Answer 22

maintaining species or ecosystem so it can regenerate, no concern for money

Question 23

Natural resources

Answer 23

ecosystems referred to as this

Question 24

Ecosystem capital

Answer 24

economic value of natural resource

Question 25

Renewable resource

Answer 25

regenerated fast

Question 26

Nonrenewable resource

Answer 26

not regenerated during human existence