13.  Accordingly Cato calls the two estates, which he describes, summarily “olive-plantation” (-olivetum-) and “vineyard” (-vinea-), although not wine and oil merely, but grain also and other products were cultivated there.  If indeed the 800 -culei-, for which the possessor of the vineyard is directed to provide himself with casks (11), formed the maximum of a year’s vintage, the whole of the 100 -jugera- must have been planted with vines, because a produce of 8 -culei- per -jugerum- was almost unprecedented (Colum. iii. 3); but Varro (i. 22) understood, and evidently with reason, the statement to apply to the case of the possessor of a vineyard who found it necessary to make the new vintage before he had sold the old.

14.  That the Roman landlord made on an average 6 per cent from his capital, may be inferred from Columella, iii. 3, 9.  We have a more precise estimate of the expense and produce only in the case of the vine yard, for which Columella gives the following calculation of the cost per -jugerum-: 

Price of the ground 1000 sesterces. 
Price of the slaves who work it 1143
(proportion to-jugerum-)
Vines and stakes 2000
Loss of interest during the first two years 497
                                            ——­
Total 4640 sesterces= 47 pounds.

He calculates the produce as at any rate 60 -amphorae-, worth at least 900 sesterces (9 pounds), which would thus represent a return of 17 per cent.  But this is somewhat illusory, as, apart from bad harvests, the cost of gathering in the produce (iii.  XII.  Spirit of the System), and the expenses of the maintenance of the vines, stakes, and slaves, are omitted from the estimate.

The gross produce of meadow, pasture, and forest is estimated by the same agricultural writer as, at most, 100 sesterces per -jugerum-, and that of corn land as less rather than more:  in fact, the average return of 25 -modii- of wheat per -jugerum- gives, according to the average price in the capital of 1 -denarius- per -modius-, not more than 100 sesterces for the gross proceeds, and at the seat of production the price must have been still lower.  Varro (iii. 2) reckons as a good ordinary gross return for a larger estate 150 sesterces per -jugerum-.  Estimates of the corresponding expense have not reached us:  as a matter of course, the management in this instance cost much less than in that of a vineyard.

All these statements, moreover, date from a century or more after Gate’s death.  From him we have only the general statement that the breeding of cattle yielded a better return than agriculture (ap.  Cicero, De Off. ii. 25, 89; Colum. vi. praef. 4, comp. ii. 16, 2; Plin.  H. N. xviii. 5, 30; Plutarch, Cato, 21); which of course is not meant to imply that it was everywhere advisable to convert arable land into pasture, but is to be understood