機器
agriculture
blue
center pivot
corn
country
crop
cultivate sprinkler
ecology
environment
equipment
farming
farmland
fertilizer
field
flowing
food
green
grow
growing
growth
industrial
industry
irrigate
irrigated
irrigation
landscape
liquid
natural
nozzles
outdoor
pipe
pipeline
pivot
plant
plantation
pollution
pour
pump
repetition
resource
rows
runoff
rural
spray
sprinkler
sprinkling
supply
system
water
watering
wheat
wheel