This invention describes a system that maps soil characteristics by measuring the force a tractor uses to pull an implement through the ground. A special hitch pin measures this pulling force, and a global positioning system records the location of each measurement. This data is then analyzed to create a map showing how soil properties vary across a field.
Why it matters: Filed before widespread, affordable high-precision GPS and powerful mobile computing. Today, these technologies make real-time, accurate soil mapping much more feasible and cost-effective.
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