Digital Soil Mapping Across Paradigms, Scales, and Boundaries: A Review
Accurate spatial soil information is urgently needed for dealing with the global issues such as agricultural production, environmental pollution, food security, water security, and human health. This need has been motivating the development of digital soil mapping. We reviewed recent advances in digital soil mapping with respect to paradigms, scales, and boundaries, with the intent to improve our understanding on current status of soil mapping. Some important challenges thus research opportunities emerged recently were then outlined, such as 3D digital mapping of the soil properties beyond soil organic matter, soil mapping in areas with intensive human activities, and multi source soil data integration for soil mapping.