Bray/Kurtz, Mehlich III, AB/D and ammonium acetate extractions of P, K and Mg in four Oklahoma soils
Hanlon, E.A.; Johnson, G.V.
Communications in Soil Science and Plant Analysis 15(3): 277-294
ISSN/ISBN: 0010-3624 DOI: 10.1080/00103628409367475
The recently developed Mehlich III and ammonium bicarbonate-DTPA multi-element extraction solutions were each compared with the more conventional Bray/Kurtz extractant for P determination and with 1N ammonium acetate for K and Mg determinations. The latter two solutions are single and tri-element extractants in current use by the Oklahoma State University Soil Testing Laboratory. The Bray/Kurtz extractant was also compared with the 1N ammonium acetate for K and Mg determination.