Аннотация:Information on soil properties is of vital importance for crop development but very difficult to obtain from the online data stores such as satellite imagery repositories and digitized soil maps. Only the information about top soil is possible to derive from the imagery of the bare soil, and agricultural land is covered with crops most of the time. Soil profiles are complex and agronomical properties vary not only in the topsoil but also with soil depth. Collecting and analyzing soil samples to fully characterize soil spatial variability impacting crop productivity is not only time consuming but in most cases cost-prohibiting. While there are numerous on-the-ground geophysical sensors measuring soil electrical parameters, such as electrical conductivity and resistivity, most of them still require walking or driving agricultural machinery on the field. Previously developed sensors were thoroughly tested on agricultural fields to provide detail interpolated map of important agrophysical soil properties at multiple depths. Figure 1 shows example of using combination of resistivity mapping, vertical electrical sounding, and reduced soil sampling to map soil clay content, water field capacity, and filtration coefficient at different depths.
