De Agricultura

We have now therefore explained, in what respect, the occupation of tilling the ground differs from husbandry, and a tiller of the ground from a husbandman. And we must now consider whether there are not some other species akin to these already mentioned, but which, through the common names borne by them and others, conceal the real difference which exists between them. At least there are two which we have discovered by investigation, concerning which we will say what is fitting, if it is in our power.