Estimating Tillage Effects on Artifact Distributions

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Abstract
Although behavioralists who deal with plow zone sites have a need to discriminate between cultural and non-cultural effects on artifact distributions, relatively little is known about the influences of agricultural equipment. A series of experiments was conducted to answer questions concerning the parameters of recovery, lateral artifact displacement, spatial patterning, duration of tillage, and the effects of tillage patterning. Results indicate an average recovery rate of 5-6 percent; support for the "size effect"; relatively constant recovery of small and large pieces; dominant displacement in the direction of plowing; lack of relationship between displacement and artifact size; basically random distribution of objects; and possible spurious clustering, depending upon the analytical methods employed.