Precision Soil Mapping for Identifying Hydropedologic Functional Units over an Agricultural Landscape.
Hangsheng Lin, Qing Zhu, Chuck Walker, and Xiaobu Zhou. Penn State Univ, 116 ASI Bldg, University Park, PA 16802
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 2nd-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 ValleyPhysiographicProvince in central Pennsylvania. This study illustrates a modern application of traditional soil mapping for precision hydropedologic research.