02243naa a2200349 a 450000100080000000500110000800800410001902400560006010000180011624500560013426000090019052012530019965000180145265000200147065000150149065000200150565000200152565000180154565000230156365300090158665300180159565300250161365300260163865300180166470000200168270000210170270000150172370000220173870000200176070000190178077300940179920070992015-01-29       2014    bl uuuu     u00u1 u    #d7 ahttp://dx.doi.org/10.1080/00103624.2014.9569332DOI1 aHERNANDES, A.  aDRIS norms for pêra orange.h[electronic resource]  c2014  aAbstract: Chemical analysis of leaves is an effective tool for detecting nutritional imbalances and providing data for fertilizer recommendations. Therefore, it is extremely important to establish criteria for interpreting these results. The DRIS (Diagnosis and Recommendation Integrated System) method is an alternative to the interpretation of results of leaf analysis as it allows the calculation of indexes for each nutrient, using its relations with others and comparing them with a reference population. Thus, we aimed to establish preliminary DRIS norms, by both Beaufils’s and Jones’s methods, and to derive critical levels and nutrient sufficiency ranges in the leaf tissue for Pêra orange, by studying a commercial crop in the growing conditions of the São Paulo state. The methods (Beaufils and Jones) differed in the limiting nutrients in the Pêra orange orchard. The use of regional norms must be prioritized because of differences between the management methods applied. In the methods used, the nutrients that had a greater number of concordant cases in decreasing order: Mn &gt Mg &gt B &gt N &gt Cu &gt Fe &gt Zn &gt K &gt P &gt Ca. Amplitudes related to the DRIS methods used were narrower than the conventional literature.  aCitrus fruits  aNutritive value  aAdubação  aAnálise foliar  aCitrus sinensis  aLaranja Pêra  aNutrição vegetal  aDRIS  aFertilization  aLeaf tissue analysis  aNutritional diagnosis  aSweet oranges1 aSOUZA, H. A. de1 aAMORIM, D. A. de1 aNATALE, W.1 aLAVRES JUNIOR, J.1 aBOATETTO, A. E.1 aCAMACHO, M, A.  tCommunications in Soil Science and Plant Analysisgv. 45, n. 22, p. 2853-2867, Dec. 2014.