A specially designed trenching excavator was built to dig a drainage line and lay plastic drainage tile at the same time. The drainage tile was coiled up on the back of the trencher, conveyed over the top of the machine, and placed into the freshly dug trench by a bucket. A trailing plow would push the dirt back into the trench, covering up the tile. The special design allowed a single machine to perform all of these operations at once. As a result, farmers could begin planting as much as
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