In order to study the relationship between soil particle size and tobacco leaf quality in Henan tobacco area, 26 representative soil samples and flue-cured tobacco samples were taken from the main tobacco growing areas of Henan. The fractal model of soil quality was established and the soil fractal dimension D value of soil particle mass in plowlayer was calculated. By using multiple comparison, simple correlation analysis and path analysis, the correlation between soil fractal dimension and main physical p...