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Evaluation Of Some Chemical Extraction Methods Used As Indices Of Soil Nitrogen Availability In Polatlı State Farm Soils In Ankara Province, Abdel Karim Hassan Awad Elkarim, Sadik Usta
Evaluation Of Some Chemical Extraction Methods Used As Indices Of Soil Nitrogen Availability In Polatlı State Farm Soils In Ankara Province, Abdel Karim Hassan Awad Elkarim, Sadik Usta
Turkish Journal of Agriculture and Forestry
In pursuit of evaluating the suitability of methods for determining the ability of soils to supply available nitrogen under different soil conditions, two biological aerobic and anaerobic incubation procedures and six chemical extraction methods were applied to 31 samples of soil collected from the Central Anatolian area. The selected area for the study represents the criteria of arid and semi-arid regions. Statistically significant correlation coefficients were found between the biological methods and the five chemical methods that were evaluated out of the six. Only the alkaline KMnO_4 method did not give a significant correlation cofficient. The results of the phosphate-borate …