This _Index_ may be also useful for discovering Pretenders by an Examination, without which, Gentlemen are liable to be imposed on by them, as I am afraid too many have been; for amongst all those who have undertaken the Management of my Scheme for Noblemen, or others, I declare I do not know one Person that sufficiently understands it: There may be some who have seen, or perhaps performed, some of the mechanical Part; but I don’t think it can be properly performed without a thorough Knowlege of the Principles, which cannot be expected of such illiterate Persons; and yet is necessary for the proper Applications in different Cases, which cannot be distinguished by Pretenders: Therefore, until the Scheme becomes common, the Management must be under the Direction of the Master himself, or of one who has past his Examination, and is faithful. To the above Trials, I here add the following, together with some Alterations of the former. Gentlemen who can get the _Smyrna_ Wheat, I advise to make Trials of it in single Rows, of between 17 and 18 to an Acre, in this Method; there being no Partitions, the Intervals will be of the same Width as in the Ridges of 14 to an Acre, that have Partitions of Ten Inches. Thus almost all the Earth of the Ridges may be pulverized by the Hoe-plough in the Field, or by the Spade in this Trial; and very little Hand-work will be necessary for cleansing out the Weeds that come in the Rows, and on each side of them. The Land will be the fitter for a succeeding Crop of Wheat with less Harrowing. But this must be observed, that, in regard to hard Frosts in Winter, and very dry Weather in Summer, the alternate Hoeing described in the Chapter of Turneps may be proper; lest the little Earth that may be left for the Row to stand on, when the Furrows are turned from both Sides of it, should not be sufficient to secure the Roots from the Injuries that may happen to them by being exposed either to Frost or Drought on both Sides of the Row at the same time.