agriculture
asian
chaina
color
cop
corn
cultivate
curve
earth
ecology
environment
farm
field
food
green
ground
harvest
hill
horticulture
hut
irrigation
knowledge
ladder
land
landscape
lao
leaf
management
meadow
mountain
nature
outdoor
paddy
plant
plantation
regulation
rice
scenic
sky
soil
spring
steps
system
terraced
thai
thailand
tourism
tree
valley
vietnam