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2. Spring-tooth harrow - Wikipedia

   en.wikipedia.org/wiki/Spring-tooth_harrow

   A spring-tooth harrow is a type of harrow, and specifically a type of tine harrow. It uses many flexible iron teeth mounted in rows to loosen the soil before planting. A drag harrow more specifically refers to a largely outdated type of soil cultivation implement that is used to smooth the ground as well as loosen it after it has been plowed ...

3. 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.

4. Drag harrow - Wikipedia

   en.wikipedia.org/wiki/Drag_harrow

   A 4-foot drag harrow A larger, 12 foot drag harrow simply uses three four foot sections that are connected. A drag harrow, a type of spring-tooth harrow, is a largely outdated type of soil cultivation implement that is used to smooth the ground as well as loosen it after it has been plowed and packed.

5. Backlash (engineering) - Wikipedia

   en.wikipedia.org/wiki/Backlash_(engineering)

   In mechanical engineering, backlash, sometimes called lash, play, or slop, is a clearance or lost motion in a mechanism caused by gaps between the parts. It can be defined as "the maximum distance or angle through which any part of a mechanical system may be moved in one direction without applying appreciable force or motion to the next part in mechanical sequence."

6. File:12 foot spring-tooth drag harrow.jpg - Wikipedia

   en.wikipedia.org/wiki/File:12_foot_spring-tooth...

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7. Stale seed bed - Wikipedia

   en.wikipedia.org/wiki/Stale_seed_bed

   The initial tillage is normally done with a disc harrow or a rotary tiller, rather than with a plow. If plowing is required, secondary passes with a disc or tiller will be needed. The next step is to break up clods and flatten the surface is done with a spring-tooth or spike-tooth harrow, or with a