calc an acre
The Calc-An-Acre is a state of the art area counter that accurately measures and displays acreage with the touch of a button. Attached to the planter's drive wheel, the Calc-An-Acre measures actual planted acres. The sub area can be measured while maintaining a count of the total acres at the same time. The Calc-An-Acre can also serve as a digital speedometer that reads the true ground speed in M.P.H.