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2. Wheel tractor-scraper - Wikipedia

   en.wikipedia.org/wiki/Wheel_tractor-scraper

   There the pan height is set and the lip is opened (the lip is what the bottom edge of the apron is called), so that the ejection system can be engaged for dumping the load. The forward momentum or speed of the machine affects how big an area is covered with the load. A high pan height and slow speed will dump the load over a short distance.

3. Hardpan - Wikipedia

   en.wikipedia.org/wiki/Hardpan

   In soil science, agriculture and gardening, hardpan or soil pan is a dense layer of soil, usually found below the uppermost topsoil layer. [1] There are different types of hardpan, all sharing the general characteristic of being a distinct soil layer that is largely impervious to water. Some hardpans are formed by deposits in the soil that fuse ...

4. Tillage - Wikipedia

   en.wikipedia.org/wiki/Tillage

   According to J. Hall (1970), [39] in Ontario at least, the most widely used site preparation technique was post-harvest mechanical scarification by equipment front-mounted on a bulldozer (blade, rake, V-plow, or teeth), or dragged behind a tractor (Imsett or S.F.I. scarifier, or rolling chopper). Drag type units designed and constructed by ...

5. Roller (agricultural tool) - Wikipedia

   en.wikipedia.org/wiki/Roller_(agricultural_tool)

   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 lawn areas. Flatter land makes subsequent weed control and harvesting easier, and rolling can help to reduce moisture loss from cultivated soil.

6. Harrow (tool) - Wikipedia

   en.wikipedia.org/wiki/Harrow_(tool)

   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.

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