The researchers studied soil fertility factors in Lushi tobacco fields by analyzing 250 soil samples. They used geostatistics and GIS to assess the spatial variability of soil organic matter, pH, available N, available P, and available K. The results showed that the variation in these factors ranged from 4.28% to 46.95%. Soil pH and available K had spherical patterns, while available N, available P, and organic matter had exponential patterns of spatial dependence. Soil pH and available P were strongly spatially dependent, while the other factors were moderately dependent. The researchers created maps of soil properties in the region using kriging analysis with arcview software.