Suitability of Sequential Extraction (Step.1) Method for Used to Determine Plant Available Boron (B) of Erzurum Plain and Oltu District Agricultural Soils

The purpose of this study was to studied suitablity of sequential extraction method (step.1) for determining plant available boron content of Erzurum Plain and Oltu District agricultural soils. Representative total 32 of soils samples were collected from different soil locations of Erzurum (19) and Oltu district (13). In order to determining suitability sequential extraction method (step1) as related to of the test plant (potato) was taken as the standart (biological) index. However, the correlation analysis for both Erzurum Plain and Oltu location showed non-significant correlation(not show any significant differences between plant availlable boron and leaf boron content, (biological index /boron uptake of plant) so; based on these result and because sequential extraction (first step) method was not comparable, sequential extraction (first step) method is not recommended for plant available Boron extraction. Results showed that the step1 chemical exraction methods might not be used for plant available Boron at least in this conditions growing potato in this Erzurum Plain and Oltu location.