na INLIS000000000004153 Ind 0010-1118004153 631.413 P. Del Castilho Ammonium acetate extraction for soil heavy metal speciation; model aided soil test interpretation CASTILHO, P. Del Bibl.: p. 64 Repr. from: Intern. J. Envir. Anal. Chem., Vol. 51, 1992: p. 59-6 ACETATES AMMONIUM SOIL FERTILITY 214/MS/93