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PEDOGENIC DISTRIBUTION OF PHOSPHORUS FORMS RELATED TO TOROGRAPHY , WEATHERING RATE, AND SOIL DEVELOPMENT “ AL – HAMDANYIA REGION NORTHERN Iraq | ||
| AL-TAQANI | ||
| Article 1, Volume 24, Issue 3, 2011, Pages 0-0 | ||
| Abstract | ||
| This study is carried out in an important agricultural region which put under dry farming system for long time. The region characterized by wavy and undulating topography. The results shows that the total phosphorus content is relatively high. This is attributed to parent materials and to low activity of weathering processes, which indicates the low degree of soil development. It’s content exhibits decreasing with depth because the affect of organic matter. Such distribution indicate slow vertical movement and little effect of topography except pedon (42) which shows higher content of total phosphorus because the addition processes of the phosphorus from the surrounding area, and the effect of the organic matter. Organic phosphorus Shows the same trend of variation and show better affect of topography on distribution than other forms, which marked the depth of percolating water. Mineralogical phosphorus exhibit the same behavior with low rate. | ||
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