. An encyclopædia of agriculture [electronic resource] : comprising the theory and practice of the valuation, transfer, laying out, improvement, and management of landed property, and the cultivation and economy of the animal and vegetable productions of agriculture, including all the latest improvements, a general history of agriculture in all countries, and a statistical view of its present state, with suggestions for its future progress in the British Isles. Agriculture. 357. three or more cross bars, fixed into two end-pieces in sucli a manner as to be very rough and bushy underneath. To t
. An encyclopædia of agriculture [electronic resource] : comprising the theory and practice of the valuation, transfer, laying out, improvement, and management of landed property, and the cultivation and economy of the animal and vegetable productions of agriculture, including all the latest improvements, a general history of agriculture in all countries, and a statistical view of its present state, with suggestions for its future progress in the British Isles. Agriculture. 357. three or more cross bars, fixed into two end-pieces in sucli a manner as to be very rough and bushy underneath. To the extremities of the frame before are some- times attached two wheels, about twelve inches in diameter, upon which it moves; sometimes, however, wheels are not employed, but the whole rough surface is applied to, and dragged on, the ground. 2706. The only essential implement of the harrow kind is the Berwickshire harrow. (fg. 350.) Sect. IV. Rollers. 2707. The roller is constructed of" wood, stone, or cast iron, according to convenience or the purposes for which it is to be used. For tillage lands, the roller is used to break the lumps of earth, and in some cases to press in and firm the ground about newly sown seed; on grass lands it is used to compress and smooth the surface, and render it better adapted for mowing. It has been matter of dispute whether rollers with large or small diameters have the advantage in point of effect upon the land. In constructing heavy rollers, they should not have too great a diameter, whatever the material be of which they are fonned, as the pressure is diminished where the implement is of very large size, by its resting on too much surface at once, except an addition of weight in proportion be made. By having the roller made small, when loaded to the same weight, a much greater effect will be produced, and a considerable saving of expense be made in the construction of the implement. The common length of rollers is five or six feet, and
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Keywords: ., bookcentury1800, bookpublisherlondonprin, booksubjectagriculture
