Available Phosphorus and Exchangeable Potassium in some Albanian Soils Extracted by Different Extraction Methods


1Department of AgroEnvironment and Ecology, Agricultural University of Tirana, Tirana, Albania

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Available Phosphorus and Exchangeable potassium are important indicators to evaluate the potential of the soil to supply the plants with phosphorus and potassium. Currently, in our labs the basic extraction method to determine the available phosphorus is Mehlich III method exchangeable whereas potassium is determine by extraction with ammonium acetate.  Furthermore, studies have been carried out for evaluation of the available phosphorus and exchangeable potassium in Albanian soils with CAL and EUF extraction methods as well as the correlations between them. The objective of this paper is to determine the quantity of available phosphorus extracted by Mehlich III method and to compare the results with available phosphorus extracted with CAL method as well as exchangeable potassium extracted with ammonium acetate and to compare the results with potassium extracted with CAL method.

Keywords: Soil, phosphorus, potassium, Mehlich III method, CAL method.