Columbia subject headings:
Agricultural productivity--Brazil--Rio de Janeiro (State)
Agriculture--Economic aspects--Brazil--Rio de Janeiro (State)
Harvard subject headings:
Agricultural productivity--Brazil--Rio de Janeiro (State)
Agriculture--Economic aspects--Brazil--Rio de Janeiro (State)
Princeton subject headings:
Agricultural innovations--Brazil--Rio de Janeiro (State).
Agricultural productivity--Brazil--Rio de Janeiro (State).
Agriculture--Economic aspects--Brazil--Rio de Janeiro (State).
Farms, Small--Brazil--Rio de Janeiro (State).