Spatial variability of soil properties in two plant communities of grassland and scrubland (case study: Vavsar kiasar rangeland)

Most important reason of spatial changes in vegetation is spatial variability of soil properties، so knowledge about pattern distribution of variability soil properties for better management is necessary. Two study site including grassland and scrubland were selected in this study. One 500 × 400 m2 network was established in each study site and soil samples were taken from intersection points. 30 soil sample from 0-30 cm depth in scrubland. Also in grassland were taken 30 soil samples from 0-30 cm depth. Compares of means of soil properties using T-student test was shown carbonate calcium، EC، organic carbon، percent of silt and sand have significant different in two community (p< 0. 05). Spatial analysis was represented; appropriate models for entire soil properties were isotropic models. Most of soil properties had moderate to high spatial relationship that shows points close to each other had similar values whereas pH & EC had low spatial relationship in scrub land that shows points close to each other had not similar values necessarily. Soil properties except percent of clay with moderate relationship، in grass land had strong spatial structure.