Abstract:
The study area was chosen in control of alluvial plian (Latyfia Project) near Euphrates , Southeast of to study the variability of properties Chosen transect length 7776 m passes broadest soil units area and the most frequent , and identified 12 series. The Spatial Varibility of some physical and chemical properties for defrent horizon by Time Series Analysis .
The results were as follows : the statistical models is appropriate to describe the variation of soil properties the most frequent was Moving avareges MA (1) by 59.30 % and Autoregressive AR(1) by 40.70 % . The number of samples required for the study transect in the case of dependence on the autocorrelation coefficient for physical properties ,while requests more samples in the case of relying on the random lows , the autocorrelation of the chemical properties weak if less than 0.5 .
Soil classified according theAmerican classification at subgroup levels ( Typic haplosalids) for pedons 5,7,10, and ( Typic Torrifluvents ) for pedons 1,2,3,4,6,8,9,11,12 . |