Env Sci Unit 5 Review

GMOs are leading to loss of original/ native plants because of cross breeding effecting genetic diversity

• true

• false

Farmers use it because exact amount of nutrients for plants need can be met (% phosphorous/nitrogen/potassium)

• organic fertilizer

• synthetic fertilizer

• either, whatever is cheapest

• nothing, let nature take its course

Trenches dug between crop rows in a field, results in salinization, least effective method, 35% of water evaporates

• furrow

• flood

• drip

• spray

Used heavily in underdeveloped countries, causes erosion and soil degradation by temporary water logging:

• furrow

• flood

• drip

• spray

Use of this method of control requires concentrations to be increased often because pest develop resistance

• GMOs

• Pestsides

• plant removal

• control burning

Local water sources are being polluted by organic waste from

• GMOs

• CAFOs

• irrigation from aquifers

The Green Revolution was

• a dramatic increase in crop yields in developing countries

• change to more sustainable agriculture

• way of fighting soil erosion

• power grab by the Green party in the 1980s

Why was the Green Revolution controversial?

• Expensive equipment

• Famine

• Exporting of foods

• Importing of foods

Which of the following is a disadvantage of slash and burn agriculture?

• Limits CO2 emissions

• Emits CO2

• left the soil too moist

• led to poor soil over time

Which of the following is a positive outcome of tilling?

• reduced soil drainage

• increased soil erosion

• increased aeration

• decreased crop production