golden apple snail Pomacea canaliculata
carp culture in paddy field
ecotypic structures reestablished in paddy-field
field in field technique
Field-in-field technique
Fish breeding in paddy field
fish culture in paddy field
fishculture in paddy field
fish-farming in paddy field
Paddy field in South China
paddy-field in mountain area
penetrative soil layer in field in situ
Raising ducks in paddy field
Raising fish in paddy field
surface water in paddy field
water saving in paddy field