The researchers collected soil samples in Taiyuan to study soil fertility. They found that soil organic matter and nitrogen levels were moderate. The data showed spatial patterns, with soil nitrogen influenced by its own location, while organic matter was affected by both location and randomness. Factors like soil type, elevation, land use, and human activities also played a role. Soil contamination from coal mining and other factors led to different spatial patterns for organic matter and nitrogen. This study helps understand soil fertility in Taiyuan and can guide sustainable soil management.