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Soil-geosynthetic composites such as those used in mechanically stabilized earth (MSE) retaining walls are experiencing widespread use, particularly in transportation applications. The potential economic benefit of using "lower-quality" on-site material in MSE retaining wall applications is substantial. An experimental research program investigating soil-geosynthetic interaction was performed at the University of North Carolina at Charlotte. To study this composite behavior, the research program employed a large pullout box equipped with state-of-the-art electronic instrumentation and data acquisition. The interaction of two "lower quality" piedmont residual soils (A-2-4 and A-4) with four representative, geosynthetic reinforcement materials (rigid geogrid, flexible geogrid, high strength geotextile, and medium strength geotextile) was examined through a series of anchorage strength tests. Through these tests, insight into the load versus deformation behavior of the reinforcing materials embedded in piedmont residuum was obtained. This report describes the test methodology and presents test results.