As I understand it, farmers had to set "check wires," which had a series of knots at a certain spacing. The wires were lined up with fingers on the planter, and every time the planter encountered a knot in the wire, the fingers would "trip" and deposit a seed. It led to very uniform row spacing, as the check wires were re-used on the next set of rows...but as I understand it, the process was very time-consuming, as the check wires had to be repositioned as you moved through the field.
At least that's how my dad explained the process to me. I've never seen it actually used around here.
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Today's Featured Article - Hydraulic Basics - Part 2 - by Curtis Von Fange. In the last entry to this series we gave a brief overview of hydraulic system theory, its basic components and how it works. Now lets take a look at some general maintenance tips that will keep our system operating to its fullest potential. The two biggest enemies to a hydraulic system are dirt and water. Dirt can score the insides of cylinders, spool valves and pumps. Wate
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