Precision hydropedologic research requires precision soil mapping. Second-order soil mapping is a good starting point for improved precision of soil delineations over a landscape or watershed, but itself is inadequate for site-specific hydrologic studies and crop management. This is primarily due to considerable variability within 2^nd-order soil mapping units and imprecision of soil boundaries. High intensity soil mapping can help identify the functional units of the landscape-soil-water relationships when combined with maps of various landscape features, soil moisture spatial-temporal patterns, and crop yields. We developed a protocol for precision soil mapping to identify hydropedologic functional units over an agricultural landscape typical of the Ridge and Valley Physiographic Province in central Pennsylvania. This study illustrates a modern application of traditional soil mapping for precision hydropedologic research.