Spatial Variability of Some Physical and Chemical Properties from Mid- Mesoptamian Plain Using Statistics Concepts Pedology | ||
| Journal of Tikrit University For Agriculture Sciences | ||
| Article 1, Volume 14, Issue 1, June 2014, Pages 236-245 | ||
| Authors | ||
| Abdulhalim Ali Suliman; Amal Radhi Jubier | ||
| Abstract | ||
| The study area was chosen in the Mid Mesopotamian plain (Lattifiya project ) adjacend to Euphrates south east Baghdad between N 33 03 – 33 49 and E 44 23 – 44 10 , in order to study the variability of properties for the most extensive and fieqnented map units , Acartographic analysis of soil map was conducted to know a percentages and frequencies of map units , transect of 7776 m was selected passes through out the most extensive and frequented map units ,the soil series determined Lateral spatial variability of physical , chemical properties were studied for these pedons and their horizons , using the time series analysis ,pedostatistics ,vertical rates of changes were measured and results were ;- There are variations in some properties physical and chemical , when pedostatistics used , soil then variable property was bulk density , then clay content , sand content , silt content .the most variable property was organic matter content , then, soil salinity ( EC) , CEC and CaCO3 .The suitable statistical model of describing the most frequested soil properties was AM (1) , 59.30 % , AR (1) in 36.05 % while the statistical models when pedostatistics used , the spherical model was the most suitable model of soil properties in 97.56 % , then circular model in 2.45 % .The most suitable technique of soil sampling that efficiently. representative was depending on the range and variogram where they showed :Soil properties that have spatial dependency resulted in low numbers of soil samples to represent the transect when compared to the randomized soil samples that where more samples were needed soil samples,The physical properties samples number that represent studied transect between 2 – 7 samples, the highest was for clay content in the case of spatial dependency , while the number of samples was larger 1455 samples in the case of randomizing low dependency , the largest number for total surface area .The chemical properties samples number were 2 – 20 samples, the highest was for organic matter that required 7686 samples in the case of randomizing low dependency, the highest number was for EC Soils were classified according to USDA 2010 , under the sub group level ( Typic haplosalids) for pedons 5,7,10, and ( Typic Torrifluvents ) for pedons 1,2,3,4,6,8,9,11,12 | ||
| Keywords | ||
| Statistics Concepts Pedology; Spatial Variability | ||
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