ENV 07 Soil and Ag

Why is it important to preserve farmland?

• Farmland provides crops and fruits to support urban and rural populations.
• Farmland provides most of the oxygen for urban areas.
• Farmland controls the temperature of urban areas.
• All of these

Which of the following statements about tree harvesting methods is correct?

• Selective cutting minimizes the impact on forest ecosystems.
• Clear-cutting is quick but is more expensive than other methods.
• Selective cutting eliminates the possibility of soil erosion.
• Clear-cutting requires the most road building due to the large number of trees harvested.

Which of the following is NOT an environmental effect of deforestation?

• re-planting of trees
• reduction of wildlife habitat
• loss of topsoil
• soil erosion

Which of the following allows forests the best recovery after tree harvesting?

• cutting only medium-age or mature trees
• cutting all of the trees and then replanting the area with seedlings
• allowing the forest to reseed itself
• cutting only young trees and then replacing them with seedlings

Deforestation is an especially serious problem in tropical rain forests because

• farmers must repeatedly clear additional forest area to obtain land that can support crops.
• it takes so long for the replacement seedlings to reach maturity due to the hot climate.
• they are located in developed nations with high per person resource consumption.
• the downed trees are left to rot, damaging the soil.

Tags

NGSS.MS-ESS3-4

What is a complex plant-supporting system made up of disintegrated rock, water, gases, nutrients, and microorganisms?

• Soil
• Tilling
• Feedlot
• Loam

Using a source other than precipitation to water crops is known as

• Irrigation
• Pollination
• Green revolution
• Cover crop

About how much of Earth’s land surface is used for agriculture?

• 38%

• 28%

• 18%

• 08%

Choose 3: Traditional agriculture may use which of the following

• Teams of work animals

• Irrigation by hand

• Fossil fuels

• Organic fertilizer

What do we call the physical and chemical processes that break down rocks and minerals into smaller particles?

• Weathering
• Irrigation
• Crop yield
• Litter layer

Tags

NGSS.MS-ESS2-2