In the agro Romano, or zone immediately around Rome, land is as a rule left for pasturage.
Considerable trade is done in agro di limone or lemon extract, which forms the basis of citric acid.
Since 1884 the Italian Government have been systematically enclosing, pumping dry, and generally draining the marshes of the Agro Romano, that is, the tracts around Ostia; the Isola Sacra, at the mouth of the Tiber; and Maccarese.
The summer is propagated by the mosquito (Anopheles claviger) marks a new epoch; the most diverse theories as to its origin had hitherto been propounded, but it is now possible to combat it on a definite plan, by draining the marshes, protecting the houses by fine mosquito-proof wire netting (for Anopheles is not active by day), improving the water supply, &c., while for those who have fever, quinine (now sold cheaply by the state) is a great specific. A great improvement is already apparent; and a law carried in 1903 for the Bonifica dell' Agro Romano compels the proprietors within a radius of some 6 m.
In 1900 31% of the inhabitants of the Agro Romano had been fever-stricken; since then the figure has rapidly decreased (5 .
The wheat crop in 1906 in the Agro Romano was 8,108, 500 bushels, the Indian corn 3,314,000 bushels, the wine 12,100,000.