Unit 5 Flashcards
define tragedy of the commons
a situation in which shared resources are depleted due to overuse + lack of responsibility
what is an externality
the cost of a good/service not included in price
compare and contrast advantages and disadvantage of hydroponics
Advantage :
- efficient wateruse
- reduction of pesticide
- reduction of soil
Disadvantages :
- initially expensive to set up
- monitored for fungal growth
- relies on external light source
list irrigation methods
- flood irrigation
- furrow irrigation
- spray irrigation
- drip irrigation
compare and contrast clear cutting vs selective cutting
clear cutting : removal of entire forest, most profitable
selective cutting : selection of specific vegetation, least environment impact
how are lands classified?
rangelands, national monument, wilderness preserve
NPS - National Park Service - recreation, education research
BLM - Bureau of Land Management
FWS - Fish Wildlife Service
How is prescribed burn beneficial to an ecosystem
reduce risk of wildfire by reducing accumulated debris and restoring soil nutrients
what is the effect of urban sprawl
moving from city to suburbs, increase use of fossil fuels by increase of auutomobiles and land for development -> increases CO2 emissions
compare and contrast pesticide, herbicide, and insecticide
pesticide : specific pest
herbicide : targets vegetation (weeds)
insecticide : targets insects
how does a nation achieve food security
economic access & procurement. Political & economic stability & governance
Food insecurity occurring over a short-time
describe GMO
genetically modified organism
- one strain selected
- increase crop production, reduction of fertilizers, pesticides
what is the advantage of organic agriculture
application of natural products increase in biological activity due to increase CO2
Describe techniques in integrated pest management
integrated pest management
relies of Natural approach
introduce competitive predator
crop rotation, intercropping
how do farmers maximize productivity and increase a crop production
decreasing tilling/plowing
utilization of agricultural machinery, crop rotationm seasonal harvesting
what is a CAFO
Concentrated Animal Farming Operation
drawback disease. Adv containment of resources
list advantages of drip irrigation
least expensive, most efficient reduced water consumption
hoses buried/on surfaces
