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EFFECT OF WETTING AND DRYING CYCLES ON ADDED POTASSIUM RELEASE TO SOME CALCAREOUS SOILS IN NORTH IRAQ | ||
| Mesopotamia Journal of Agriculture | ||
| Article 9, Volume 38, Issue 1, 2010, Pages 32-37 PDF (0 K) | ||
| DOI: 10.33899/magrj.2010.27743 | ||
| Author | ||
| M. A-alobaidi | ||
| College of Agriculture and Forestry- Mosul University | ||
| Abstract | ||
| Two surfaces soils horizon from calcareous soils in Mosul city classified as calciorthid with semictite dominance were chosen to study the effect of wetting and drying cycles on release of native and added potassium.Potassium was added to soil samples at rate (0,100,200,and 400 mgk.kg-1) as potassium chloride. Potassium release was determined by using Ca-resin capsules for 10 cycles of wetting to F.C and drying. Results showed that flaccuted water conten drying wetting and drying cycles increased of K-release of pedogenic and K-added to Ca-resin capsules until the tenth of wetting –drying cycle.Fine texture release more pedogenic K than coarse texture, also potassium fertilization rates with wetting and drying cycles increased of K-release to Ca-resin capsules. | ||
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