Abstract
A vibratory digger for peanut (Arachis Hypogea, L.) was designed, fabricated and tested. It consisted of ablade assembly hinged on a rigid frame and a cam assembly connected to the blade by an arm, which was driven by aroller chain from a gearbox. Power was furnished by a tractor pto. The tests under two soil types included: two tractorspeeds (2.4, 4.8 km/h), two frequencies of vibration (9, 16.7 Hz) and two amplitudes of vibration (3.2, 9.6 mm). Soilconditions, tractor speed, and amplitude of vibration, but not frequency, significantly affected the draft. Vibration did notsignificantly affect percent peanut ground losses.
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