Eight plots with ?Artemisia halodendron, Populus? and ?Pinus? plantations and shifting sandy land both four at leeward with
similar slope and exposure and four on top of dune respectively, and three plots with similar ?Hedysarum fruticosum var. ligosum? plantation at bottom, middle and top of sand dunes were chosen to monitor soil moisture to determine impacts of the plantation on both soil moisture regime and soil moisture spatial
heterogeneity by using fractal dimension and semivariograms in
Horqin Sandy Land. The results show that: (1) the soil moisture regime of the plots worsens in the order of ?Artemisia halodendron, Populus? and ?Pinus? plantation; (2) the soil moisture is significantly dependent on its position at the sand dunes; (3) horizontally, the soil moistures for ?Populus, Pinus? plantations and shifting sand land plots exhibits homogeneity within the scale of 4m, 8m and 9m, respectively. However, that for ?Artemisia halodendron? plantation plot show high heterogeneity within the scale of 4m, and homogeneity at the scale of 4m above. Vertically, the soil moisture for ?Artemisia halodendron, Pinus? plantation and shifting sand land plot exhibits heterogeneity within the depth of 120cm, 80cm, 60cm, respectively, and homogeneity in the depth lower. However, ?Populus? plantation plot shows great heterogeneity within the depth of 300cm. In a word, heterogeneity of soil moisture for plantation plots is higher than that for shifting sandy land plots both on horizontal and vertical scales.\;