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APPLICATIONS OF NUMERICAL TAXONOMY FOR SOME SOIL SERIES OF RIVER LEVEES IN IRAQI ALLUVIAL PLAIN | ||
| AL-TAQANI | ||
| Article 1, Volume 21, Issue 2, 2008, Pages 0-0 | ||
| Abstract | ||
| This study was conducted on some soils of agricultural projects in the middle of Mesopotamian plain representing two physiographic units, river and irrigation canal levees. The aim of the study was to classify the soil pedons by using numerical methods. Nine sites were selected as follows : Ishaqi, Kassawiy, Saqlawiya,Baghdad,Field of the College of Agriculture (Abu-Ghraib) , Radhwania, Suwaira,Latifiyah, Great Mussaib. Some morphological , chemical, physical and mineralogical properties were selected for hierarchical grouping numerical methods which were: (Nearest Neighbour) (NN), (Furthest Neighbour) (FN), Unweighted pair – group method using arithmetic averages (UPGMA), Weighted pair – group method using arithmetic averages (WPGMA), Unweighted pair – group centroid method (UPGMC), Weighted pair – group centroid method (WPGMC), Ward’s method (M.V.). The classification indicated that pedons of Ishaqi and Baghdad resulted in the highest similarity index, and the major character of these pedons was the declining in electrolytical conductivity values.Using the criteria for hierarchical classification (Chaining, Stratification, Descriptive accuracy);the results indicated that the Ward’s method was the best numerical method because it was able to form obvious groups. | ||
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