Please note that Mommsen uses the AUC chronology (Ab Urbe Condita), i.e. from the founding of the City of Rome. You can use this reference table to have the B.C. dates
The husbandry of the petty farmer differed from that of the estate-
holder only or chiefly in its being on a smaller scale. The owner
himself and his children in this case worked along with the slaves or
in their room. The quantity of cattle was reduced, and, where an
estate no longer covered the expenses of the plough and of the yoke
that drew it, the hoe formed the substitute. The culture of the olive
and the vine was less prominent, or was entirely wanting.
In the vicinity of Rome or of any other large seat of consumption
there existed also carefully-irrigated gardens for flowers and
vegetables, somewhat similar to those which one now sees around
Naples; and these yielded a very abundant return.
