Using OK and IDW Methods for Prediction the Spatial Variability of A Horizon Depth and OM in Soils of Shahrekord, Iran

摘要: This study attempts to evaluate some interpolation techniques for mapping spatial distribution of A horizon depth and OM in Shahrekord, Iran. 15000 hectares South West Shahrekord soils were studied which totally 92 soil profiles excavated classified according USDA. The performance methods was evaluated by RMSE, ME R 2 . Calculated RMSE 0.01074, 0.19670 0.19858, respectively IDW OK (with Spherical Exponential models). surface obtained 0.05593, 0.12121 0.05078, results showed that could estimate the variability Ok semivariogram) more better than other methods. weakness kriging prediction continuity is due effects forming factors evolution evolved different landforms area take out stationary assumptions. Key w ords : Ordinary Kriging, Inverse Distance Weighting, Evaluation models