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The roller is an agricultural tool used for flattening land or breaking up large clumps of soil, especially after ploughing or disc harrowing. Typically, rollers are pulled by tractors or, prior to mechanisation, a team of animals such as horses or oxen. As well as for agricultural purposes, rollers are used on cricket pitches and residential ...
The Massey-Harris Model 81 was a two-plow small-farm tractor built by Massey-Harris (later Massey Ferguson) from 1941-1948. [1] Introduced to replace Massey's General GG, [1] the 81 was paired with the Model 82 (which used kerosene, or tractor vaporizing oil {TVO}, as it was known in Britain) [2] and was very similar to the Model 101 Junior, [1] which first appeared in 1939. [3]
The disk harrow is used first to slice up the large clods left by the mould-board plough, followed by the spring-tooth harrow. To save time and fuel they may be pulled by one tractor; the disk hitched to the tractor, and the spring-tooth hitched to, and directly behind, the disk. The result is a smooth field with powdery dirt at the surface.
As with other Farmall letter-series tractors, the design featured an integral frame and unitary construction, allowing entire assemblies to be replaced. Rear wheels on all models used a geared portal axle to provide sufficient ground clearance, and could be adjusted in width over a range of 40 inches (100 cm) to 68 inches (170 cm). [5] [6]
Modern Kverneland spring-tooth harrow A 12-foot traditional style spring tooth harrow. Note how it is in four foot sections with manual levers to adjust the depth of tillage. Harrows, whether spring tooth, spike tooth or disc harrows can have a drag connection or have a 3 point mounting. A drag harrow is pulled and cannot be backed up.
Primary heavy duty disc harrows of 265 to 1,000 pounds (120 to 454 kg) per disc are mainly used to break up virgin land, to chop material/residue, and to incorporate it into the top soil. Lighter secondary disc harrows help completely incorporate residue left by a primary disc harrow, eliminate clumps, and loosen the remaining packed soil.