機器
aerate
aerial
agricultural
chemicals
cultivate
dirt
equipment
farm
farmer
fertilizer
field
furrows
global
ground
harrow
herbicide
industry
insecticide
labor
land
machinery
modern
outdoors
pattern
plow
pneumatic
positioning
potatoes
rows
seed
soil
sow
spring
system
tanks
technologically
technology
till
tool
tractor
turn
work
workers