TY - SER AU - Steiner,F. AU - Lana,M.do C. AU - Zoz,T. AU - Frandoloso,J.F. AU - Fey,R. TI - Extraction methods and potassium availability for soybean in the Paraná state's soils, Brazil KW - SOJA KW - POTÁSSIO KW - ANÁLISE DO SOLO UR - http://periodicosonline.uems.br/index.php/agrineo/article/view/232 ER -