326 - THE INTERNATIONAL UNION OF SOIL SCIENCES

[PDF]1 - The International Union of Soil Sciences www.iuss.org/.../1974_10_kothpecc__10th_congress_ii_compressed.pdf Extraction of potassium from twenty one soils with a cation-exchange ..... M.V.Gama und M.L.B.Sousa. ...... D. Australian Journal of Experimental Agriculture and.