Researchers conducted a study on soil survey and mapping to improve Chinese Soil Taxonomy. They dug 64 soil profiles in four experimental lines and used diagnostic characteristics to determine soil types and draw boundary lines on a map. By checking the accuracy of the map, they found a high rate of 95%, showing that spatial interpolation methods can be effective for soil survey and mapping. This approach, combined with soil landscapes, can help soil investigators identify soil types and draw boundary lines more efficiently.