The New-England Farmer; or, Georgical dictionary p. 217 (1822)

Samuel Deane (Pastor of the First Church in Portland, Mass.)

I would not advise the farmer to plant constantly his own seed; but once in two or three years, to exchange seed with somebody at the distance of a few miles. Change of seed is doubtless a matter of importance in most kinds of vegetables; though it has not yet been so plainly discovered in this as in some others. But let the farmer beware of taking his seed from too great a distance. If he should bring it, for instance, a hundred miles from the southward, his corn would fail of ripening; if as far from the north, he must expect a lighter crop; and in case of drought, the latter will be more apt to suffer, as it has been proved by experiment. A farmer in the county of Bristol, took seed from the county of Cumberland. It came on well at first. But the summer being pretty hot and dry, it parched up, and produced next to nothing, though the seed he had taken from his own field turned out very well.

If the farmer cannot conveniently obtain new seed; or if he be loth to part with a sort that has served him well, and choose rather to use it than seed he has not tried; let him, at least, shift seed from one field to another, and especially from one kind of soil to another.

And in the choosing of seed, some regard should be had to the state of the soil on which it is intended to grow. If it be poor, or wanting in warmth, the yellow sort with eight rows will be most suitable, as it ripens early. A better soil should have a larger kind of seed, that the crop may be greater, as it undoubtedly will.

Change of Stock/Seed/Conditions