Suitability of Sequential & DTPA-TEA Extraction Methods In Determining of The Available Micro Nutrient and Some Heavy Metal Contentof Erzurum Plain Agricultural Soils

Abstract

The purpose of this investigation, micronutrients and some heavy metals status of Erzurum plain (centre) soils was to determine and also to find out suitability of different extraction methods (DTPA-TEA and sequential extraction method ) in determining of the plant available micronutrient and some heavy metal in Erzurum region soils. Representative 19 soils samples were collected from different soil locations. In order to select the most suitable chemical method as related to Phosphorus content of test plant (potato) was taken as the standart (biological) index. The results of the statistical analyses indicated that, sequential extraction methods and DTPA-TEA method were not interrelated with biological indexes for the plant available micro nutrients and some heavy metals except sequential method step.6 residual Mn investigated in Erzurum plain soils.