02022naa a2200325 a 450000100080000000500110000800800410001902200150006002400380007510000190011324501150013226000090024750000720025652009930032865000100132165000250133165000120135665000170136865000120138565300340139765300190143165300420145065300140149265300350150665300160154170000150155770000180157270000180159077300880160810503192019-11-11       2013    bl uuuu     u00u1 u    #d  a1532-2416.7 a10.1080/00103624.2012.7560002DOI1 aHERNÁNDEZ, J.  aSoil phosphorus tests for flooded rice grown in contrasting soils and cropping history.h[electronic resource]  c2013  aArticle history: Received 22 April 2011; accepted 29 November 2011.  aAbstract: Soil phosphorus (P) tests for flooded rice (Oryza sativa L.) generally present uncertainties for estimating P availability. Bray 1, 1% citric acid, Mehlich 3, Olsen extractants (dry samples), and Bray 1 extractant after 3 days (BI3) and 7 days (BI7) of anaerobic incubations were evaluated to estimate P availability for rice in 43 Uruguayan soils. Field trials were conduced at each site (0, 13, 26, and 39 kg P applied ha?1). Relative yield and absolute and relative yield increases were determined. Extracted P was variable for the different tests. For silty soils, P availability was better estimated by citric acid, Mehlich 3, and Bray 1, with similar soil P critical concentrations (6?8 mg P kg?1). The BI3 and BI7 tests showed greater soil P critical concentration but poorer correlations with yield indexes. This study contributes to the scientific basis of P fertilization for flooded rice, promoting more effective fertilizer use and minimizing environmental P losses.  aARROZ  aFERTILIDAD DE SUELOS  aFOSFORO  aORYZA SATIVA  aURUGUAY  aANÁLISIS DE FÓSFORO (SUELO)  aARROZ INUNDADO  aCONCENTRACIONES CRÍTICAS DE FÓSFORO  aRICE CROP  aSOIL P CRITICAL CONCENTRATIONS  aSOIL P TEST1 aBERGER, A.1 aDEAMBROSI, E.1 aLAVECCHIA, A.  tCommunications in Soil Science and Plant Analysisgv. 44, n. 7, p. 1193-1210, 2013.