Commun. in Soil Science an D Plant Analysis, 11(7), 753-757 (1980) a Rapid Nondigestion Method for Determination of Potass-ium In'plant-tissue

A simple, rapid and precise method that does not involve digestion has been described for determination of plant K. The method involves shaking of 0.5 g of finely ground plant materials with 40 ml of 0.5 N_ HC1 for 5 minutes. The extract is filtered and read in an Atomic absorption spectrophotometer for K. The method gives !< values that are in close agreement with those obtained with conventional digestion techniques for different crop plants and provides better precision and rapidity for determination of K in plant tissue. INTRODUCTION Minerals and trace elements in plant tissue are usually determined following wet digestion techniques involving digestion with triacid or diacid mixtures^. Recently a method has been proposed for estimation of plant K using extraction of the plant materials with magnesium acetate and ammonium acetate thus avoiding digestion of