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
From: The History of Rome, by Theodor Mommsen
Translated with the sanction of the author by William Purdie Dickson
Husbandry of the Petty Farmers
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.
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Reference address : https://www.ellopos.net/elpenor/rome/3-12-management-land-capital.asp?pg=13