8. We not only plow a deep Furrow, but also plow to the Depth of Two Furrows; that is, we trench-plow where the Land will allow it[238]; and we have the greatest Convenience imaginable for doing this, because there are Two of our Four Furrows always lying open; and Two plowed Furrows (that is, one plowed under another) are as much more advantageous for the nourishing a Crop, as Two Bushels of Oats are better than one for nourishing an Horse: Or if the Staple of the Land be too thin or shallow, we can help it by raising the Ridges prepared for the Rows the higher above the Level. [238] Very little of my Land will admit the Plough to go the Depth of Two common Furrows without reaching the Chalk; But deep Land may be easily thus Trench-plowed with great Advantage; and even when there is only the Depth of a single Furrow, that may sometimes be advantageously plowed at twice. 9. We also raise an high Ridge in the Middle of each Interval above the Wheat before Winter, to protect it from the cold Winds, and to prevent the Snow from being driven away by them. And the Furrows or Trenches, from whence the Earth of these Ridges is taken, serve to drain off the Water from the Wheat, so that, being drier, it must be warmer than the harrowed Wheat, which has neither Furrows to keep it dry, nor Ridges to shelter it[239], as every Row of ours has on both Sides of it. [239] This is a Mistake; for the Ridges in the Middle of the Intervals do not always, nor often in thin shallow Land lie high enough to make a Shelter to the Rows, they being higher: But when Wheat is drilled on the Level, ’tis sheltered by the Ridges raised in the Intervals: But we never weed or hand-hoe Wheat before the Spring. IV. _The Condition in which the Land is left after a Crop._ The different Condition the Land is left in after a Crop[240], by the one and the other Husbandry, is not less considerable than the different Profit of the Crop.