The changes of soil particle size distribution and its fractal features as well as the characteristics of soil chemical properties were studied in the desertification process of farmland in Horqin sandy land. The relationships between fractal dimension of soil particle distribution and selected soil properties were discussed. The results showed that: (1), in the transformation from non-desertifieded farmland to the most severely desertified farmland, soil sand content at the 0~15 cm plough layer increased f...