A rapid and simple field test for phosphorus in Olsen and Bray No. 1. Extracts of soil

Irving, G. C. J. ; McLaughlin, M. J.

Communications in soil science and plant analysis, 1990-12, Vol.21 (19-20), p.2245-2255 [Periódico revisado por pares]

Philadelphia, PA: Taylor & Francis Group

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