Evaluation of Different Extractants for Boron Estimation in Soils of Odisha and Andhra Pradesh

The present study was conducted to compare the four different extractants widely used in boron (B) determination soils and screen most suitable extractant for acidic (Alfisols) alkaline (Vertisols) of Odisha Andhra Pradesh. A total 200 surface soil samples were collected across two sites (100 from each site) representing pH ranges. Hot-water-soluble (HWS-B) extraction procedure being B kept as a benchmark order extracting efficiency by viz., 0.01 M Calcium Chloride (CaCl2), 1 N Ammonium acetate (NH4OAc) pH-7.0 Barium Chloride. mean values hot water extractable 0.49 (mean between 0.18 1.50 mg kg-1), CaCl2 – 0.42 0.14 1.52 BaCl2 0.45 0.10 1.68 kg-1) NH4OAc 0.60 0.17 2.43 kg-1). 1.87 0.71 4.79 1.57 5.43 1.37 0.52 4.15 1.92 0.85 8.33 respectively. coefficient variation varied 53.0 66.6 42.7 55.7 both types found order: Hot > NH4OAc. Authors conclude that amongst all compared extractants, may be an adequate well soils.