機器
agricultural
agriculture
center pivot
conservation
countryside
crop
cultivate
cultivated
dirt
ecology
ecosystem
environment
equipment
farm
farming
farmland
field
green
harvest
industrial
industry
irrigating
irrigation
land
landscape
mechanical
metal
modern
outdoor
pivot
pivotal
plant
plantation
plowed
property
pump
resource
rows
rural
sky
spray
sprayer
sprinkler
system
technology
water
wet
wheel
wheeled