[160] Some Land is very subject to the Misfortune of exposing the Roots, and therefore is less proper for Wheat; for when the Roots are left bare to the Air, they will be shrivelled, and unable to support the Plants: And on such Land the Wheat plants have all fallen down, though in Number and Bigness not sufficient to have produced the Fourth Part of a tolerable Crop, if they had stood. I am inclined to believe, that a thorough Tillage might be a Remedy to such a loose hollow Soil; for ’tis certain to a Demonstration, that it would render it more _dense_, and increase its specific Gravity: But to enrich it sufficiently without Manure, the Tillage must pulverize it much more minutely, and expose it longer, than is required for the strongest Land: The Fold also will be very helpful on such hollow Land. I have never seen any drill’d Wheat so much spoil’d by falling, as sewn Wheat sometimes is. The drill’d never falls so close to the Ground, but that the Air enters into Hollows that are under it, and the Wind keeps the Ears in Motion. Notwithstanding all the Precaution that can be used, in some unseasonable Years Wheat will be blighted: I have known such a general Blight, when some of my Lammas Wheat, planted late on blighting Land, was blighted, amongst the rest of my Neighbours, by the Insects, but the Grain of the sown Wheat was vastly more injured than that of the drill’d: The former was so _light_, that the greatest Part was blown away in winnowing, and the Remainder so _bad_, that it was not fit to make Bread: The drill’d made as good Bread, and had as much Flour in it, as the sown Wheat had, that was not blighted; for the Grains of the drill’d were much larger than those of the sown; being form’d to have been twice as big as the Grains of Wheat generally are, had they not been blighted. CHAP. XII. _Of_ ST. FOIN. St. Foin, from the Country we brought it from, is call’d _French Grass_: And for its long Continuance, some having lasted Forty Years, ’tis call’d _Everlasting Grass_, tho’ it be not strictly a _Gramen_. ’Tis call’d in _French_, _Sain Foin_, i. e. _Sanum Fœnum_, from its Quality of Wholsomeness, beyond the other artificial Grasses, green and dry. ’Tis also call’d _Sanctum Fœnum_, Holy Hay. ’Tis a Plant so generally known to every Body, that there is no need to give any formal Description of that Part of it which appears above-ground, It has many red Flowers, sometimes leaving Ears Five or Six Inches long: I have measured the Stalks, and found them above Five Feet long, tho’ they are commonly but about Two Feet. The Reason why _St. Foin_ will, in poor Ground, make a Forty times greater Increase than the natural Turf, is the prodigious Length[161] of its perpendicular Tap-root: It is said to descend Twenty or Thirty Feet. I have been inform’d, by a Person of undoubted Credit, that he has broken off one of these Roots in a Pit, and measured the Part broken off, and found it fourteen Feet.