na INLIS000000000004185 Ind 0010-1118004185 Movement of zinc sulphate in a calcium-saturated soil: cation exchange and precipitation of gypsum HARMSEN, K. K. Harmsen; N. Strawer; M. de Graaf Repr.from: Neth.J.Agric.Sci,35(1987):295-313, Bibl.: p. 312-313 63l.41 SOIL CHEMICOPHYISICAL PROPERTIES ZINC SULPHATE CALCIUM CATIONS mfn-5928