Soil nutrient patterns in southwest China reveal impact of human activity.
Soil nutrients in sloping fields in a gorge karst region in southwest China were studied using grid sampling and statistical methods. The soil had varying levels of nutrients, with available phosphorus being the most abundant. The soil nutrients showed good spatial patterns, with some nutrients having strong autocorrelation. Different soil nutrients had different spatial variations, with some showing concave patterns and others having fragmented distributions. Factors like vegetation, topography, and human activities influenced the patterns of soil nutrients in the area.