Elementary lessons in the physics Elementary lessons in the physics of agriculture . elementarylesson01king Year: 1894 122 drawing the cutting edge across them Avhilc they are under tension. When hard spots in the furrow-slice are to be cut througli the more oblique the share is the greater distance will the horses travel before it is cut off, and as the resistance is over- come in a longer time less power is required per second. Of course so much work must be done in plowing a given length of furrow, but the oblique share tends to develop an even, steady pull all the time, while the less obl
Elementary lessons in the physics Elementary lessons in the physics of agriculture . elementarylesson01king Year: 1894 122 drawing the cutting edge across them Avhilc they are under tension. When hard spots in the furrow-slice are to be cut througli the more oblique the share is the greater distance will the horses travel before it is cut off, and as the resistance is over- come in a longer time less power is required per second. Of course so much work must be done in plowing a given length of furrow, but the oblique share tends to develop an even, steady pull all the time, while the less oblique form allows the inecpialities of the soil to develop an irregular draft which is moi'e Avasteful. It is, in effect, like the triangular sections in a mowing machine, which allow the horses to be cutting all the time. 192. Function of the Land-side.â The land-side is made necessary by the inequalities of the soil and the tendency of the horses to vary their course from a straight line. When the oblique share is brought against a more resisting spot of soil, a root or a small pebble, were it not for the land-side the plow would run too far to land and the furrow would become crooked. This side pressure developed by the share produces friction between the land-side and the edge of the furrow and the land-side should, therefore, be of such a character as to move most easily under this friction. â 193. The Line of Draft.â There is a certain point, A, Fig. 53, in the mold-board of the plow, to which if the horses could be attached the plow would '' swim free ' in the soil; and the attachment of the team to the bridle, B, of the plow should be in such a position that the point of attachment, 1'),
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