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6.4 sustainable agriculture (organic agriculture (superior method (builds…
6.4 sustainable agriculture
conserve topsoil
reduces erosion downhill
contour planting/strip cropping
terracing
reduces wind erosion
hedges
intercropping
no till farming
dont plough land
insert seeds direct into soil no turn over
dont use soil
hydrorponics
aquaponics
restore soil fertillity
minerals
nitrogen
phosphorus
potassium
organic fertilizers
animal manure
green manure
plow fresh cut grass/veg direct into soil
compost
decomposed plant/veg
crop rotation
follow a yr of
corn
legumes
nitroge fixers
more efficient irrigation systems
reduce desertification
avoid=
overgrazing
deforestation
destructive plating
destructive irrigation
furrow irrigation
flood irrigation
spray irrigation
plants to anchor topsoil and hold water
efficient irrigation
drip irrigation
expensive
micro irrigation
efficient hydroponics
sealed system
reduces evaporation by 5%
expensive
stop water subsidies
gov supports enviro harmful practices
66% freshwater used
50% used in US lost thru
evaporation
leaks
inefficient use
avoid synthetic pesticides
IPM
bio controls
natural predators
parasites
pathogens
sex attractants
hormones
eco control
polyculture for habitat for predators
cultivational controls
alternate crops so pest dies out
laws
FIFRA
evaluates pesticides/protect ppl and enviro
FQPA
takes EPA reduces amount of pesticides in food for children safety
Int Agreement 2015-not signed by USA
organic agriculture
crops grown w out
synthetic pesticides
synthetic inorganic fertilizers
genetically engineer seed varies
100% organic feed w out
anitbiotics
growth hormones
USDA
farming
more labor intensive
higher cost
superior method
builds soil organic matter instead of depleting
reduces erosion
reduces water pollution
no pesticides
uses less fossil fuels energy
reduces green house emissio
matches conventional yields
more profitable
provides jobes
healthy
not perfect
fertilizer nutrients leach into groundwater
composting creates greenhouse gases
ploughing can damage soil=erosion