When you perceive the Ridges are too high, harrow them lower by the described manner of Harrowing; first with the heavy Harrows for harrowing out the Stubble, and then with light ones, which may be often, for making the Earth on the Ridges the finer for Drilling, without throwing much of it down; frequent Harrowings in this manner, not being injurious like too much Harrowing on level Ground, which is sometimes trodden as hard as the Highway by the Cattle that draw the Harrows; for in harrowing these Ridges, the Beast draws the Two Harrows, and always treads in the Furrow between them where there is none or very little Mould to tread on. The Price of Hand-hoeing of these double Rows is a Peny for thirty Perches in Length of Row, which amounts to between Eighteen and Nineteen Pence for an Acre. I should say, that in Hand-hoeing the Earth must never be turned towards the Wheat; for, if it were, it might crush it when young; neither could the Partition be clean hoed. The Hand-hoes for hoeing the Ten-inch Partition have their Edges Seven Inches long; they are about Four Inches deep from the Handle; if they were deeper, they would be too weak; for they must be thin, and well steeled. The Labourers pay for them, and keep them in Order, for their own Use. These Hoes must not cut out any Part of the Two Rows, nor be drawn through them, as the Four-inch Hoes sometimes may through the treble Rows. If I am taxed with Levity in changing my treble Rows for double ones, it will not appear to be done of a sudden. In _p._ 132. I advised the Trial of both Sorts: And now, upon fuller Experience, I find the double Rows much preferable to the treble, especially for Wheat. When Gentlemen saw the middle Row on low Ridges so much inferior to the outside Rows, they were convinced of the Effect of deep Hoeing; for they said, there was no other Reason for this so visible a Difference, except the outside Rows standing nearer to the pulveriz’d Intervals than the middle Row did. And when on high Ridges the middle Row was nearly or quite as good as one of the outside Rows, I was not convinced, that they were not diminished by the middle Row, as much as the Produce of it amounted to: And this I now find to be the Case; for Four Rows of Oats, without a middle Row, produced somewhat more than the same Number that had a middle Row; Two of which treble Rows were taken on one Side, and Two on the other Side of the double Rows, purposely to make an unexceptionable Trial. And it is, as far as I can judge, the same in Wheat. ’Tis true, I began my Horse-hoeing _Scheme_ first with double Rows; but then they were different to what they are now; for the first had their Partition uneven, being the parting Space, whereby it was less proper for Hand-hoeing, which I then seldom used, except for absolute Necessity, as to cleanse our Poppies, and the like. The Intervals also were too narrow for constant annual Crops.