Soil Conservation

Farmers that produce food that they need to survive on a daily basis are called

• Commercial agriculture
• Industrial agriculture
• Slash-and-burn agriculture
• subsistence agriculture

Which is NOT a disadvantage of deforestation?

• loss of wildlife
• loss of topsoil
• increased flooding
• maintenance of biodiversity

What is arable land?

• land covered in trees
• land usable for farming
• land that is unusable
• land too steep to build on

What is the term for the technology in which genetic material in a living cell is modified for medical an industrial use?

• biological pest control
• organic farming
• genetic engineering
• selective breeding

Limiting herd sizes, rotating herds, and multiple watering holes are all solutions to what?

• overfarming
• overgrazing
• deforestation
• global warming

excessive irrigation in drier climates leads to

• local and regional flash flooding
• increased water tables
• increased soil salinization
• increased crop yields

What is plowing in curved rows that follow the shape of the land?

• contour plowing
• soil
• subsoil
• terrace farming

What was it called when huge clouds of dust was blown into the atmosphere during the 1930s?

• Dusty Haze
• Dusty Days
• Dust Bowl

What is the correct order of the soil profile?

• OBCAR
• ABCRO
• OABCR
• ABCD

Humus is.....

• the dead parts of plants and animals in soil.
• A food we eat with pretzels.
• The tiny particles inside of soil
• The roots that come off of a plant and live in soil.