The effects of combining the Bray 1 extracting solution with ammonium chloride (NH4C1) for simultaneous extraction of P and K were studied in several experiments. For pooled data from the experiments in which the Bray 1 solution containing 0.5 mol L‐1NH4C1 was used, the relationship between the amounts of P and K extracted by the combined solution (PCand KC)and the amounts extracted separately by Bray 1 (PR) and 1Nneutral NH4OAc (KR) are given by PC= 2 + 0.906 PR, r = 0.988 and Kc= 14 + 1.033 KR, r = 0.944. Variations were observed in different experiments when the concentration of NH4C1 and the conditions of the experiment were varied.