Please use this identifier to cite or link to this item:
Full metadata record
DC FieldValueLanguage
dc.typeArtigo de eventopt
dc.titleRestrictions In The Use Of Correlation Coefficients In Comparing Methods For The Determination Of The Micronutrients In Soilspt
dc.contributor.authorDe Abrea
dc.contributor.authorDe Abreu
dc.contributor.authorDe Andrade
dc.contributor.authorVan Raij
unicamp.authorDe Andrade, J.C., UNICAMP, Institute de Química, C.P. 6154, 13083-970, Campinas SP, Brazilpt Abrea, C.A., Instituto Agronomico, C.P. 28, 13001-970, Campinas SP, Brazilpt Abreu, M.F., Instituto Agronomico, C.P. 28, 13001-970, Campinas SP, Brazilpt Raij, B., Institute Agronomico, C.P. 28, 13001-970, Campinas SP, Brazilpt
dc.description.abstractFifty nine soil samples from the State of Sao Paulo were collected from the plow layer, with about half of these samples presenting low or medium concentrations of micronutrients. Micronutrients were extracted by one of the following solutions: DTPA at pH 7.3, DTPA at pH 5.3, Mehlich-1 BR, Mehlich-1 USA, Mehlich-3, and 0.01 mol L-1 calcium chloride (CaCl2), and then determined by inductively coupled plasma emission spectrometry (ICP-AES). Simple linear correlations were calculated for the results of all methods against the DTPA method at pH 7.3. Two sets of calculations were always considered: one including all 59 soil samples and another set including only those samples containing low and medium amounts for each element. Higher correlation coefficients were observed when samples with high contents were included. For example, the range of correlations (R2) obtained for zinc (Zn) varied from 0.41 to 0.98, if all samples were considered in the calculations, but the range decreased to 0.41 - 0.55 if samples with high contents of Zn were not considered. The correlation coefficients for CaCl2-extractable Zn were not significant. The correlation coefficient (R2) range for copper (Cu) from 0.83 to 0.94 for all samples, decreased to 0.66 - 0.72 with the exclusion of the samples with higher Cu contents. For manganese (Mn), the range of correlation coefficients (R2) varied from 0.74 to 0.92 for all samples but was reduced to 0.30 - 0.50 when the samples with high contents of Mn were excluded. In the case of iron (Fe), the DTPA method at pH 5.3 presented results close to DTPA at pH 7.3 (R2 = 0.92), while the CaCl2 procedure had the poorest correlation (R2 = 0.42). In conclusion, the substitution of an extraction procedure based only in the correlation coefficients between methods may be misleading if the interest is diagnoses in the deficiency range.en
dc.relation.ispartofCommunications in Soil Science and Plant Analysispt_BR
dc.identifier.citationCommunications In Soil Science And Plant Analysis. , v. 29, n. Nov/14, p. 1961 - 1972,
dc.description.provenanceMade available in DSpace on 2015-06-30T15:06:19Z (GMT). No. of bitstreams: 1 2-s2.0-0031754555.pdf: 631644 bytes, checksum: 1af9367656a22b4143543d85ede133af (MD5) Previous issue date: 1998en
dc.description.provenanceMade available in DSpace on 2015-11-26T15:16:07Z (GMT). No. of bitstreams: 2 2-s2.0-0031754555.pdf: 631644 bytes, checksum: 1af9367656a22b4143543d85ede133af (MD5) 2-s2.0-0031754555.pdf.txt: 32078 bytes, checksum: ededefe785fcde0c446310e2cf0337a6 (MD5) Previous issue date: 1998en
dc.description.referenceDe Abreu, C.A., Van Raij, B., Efeito da reagao do solo no zinco extraido pelas soluções de DTPA e Mehlich-1 (1996) Bragantia, 55 (2), pp. 357-363pt
dc.description.referenceDe Abreu, C.A., Novais, R.F., Van Raij, B., Ribeiro, A.C., Comparação de métodos para avaliar a disponibilidade do manganes em solos (1994) Rev. Bras. Ci. Solo, 18, pp. 81-90pt
dc.description.referenceDe Abreu, C.A., Van Raij, B., De Abreu, M.F., Andrade, J.C., Efficiency of multinutrients extractants for determination of available copper in soils (1996) Commun. Soil Sci. Plant Anal., 27 (3-4), pp. 763-1761pt
dc.description.referenceDe Abreu, C.A., Van Raij, B., Tanaka, R.T., Fontes de manganes para soja e seus efeitos na análise do solo (1996) Rev. Bras. Ci. Solo, 20, pp. 91-97pt
dc.description.referenceBataglia, O.C., Van Raij, B., Soluções extratoras na avaliação da fitodisponibilidade do Zn em solos (1994) Rev. Bras. Ci Solo, 18, pp. 457-461pt
dc.description.referenceFerreira, M.E., Da Cruz, M.C.P., (1991) Micronutrientes Na Agricultura, , Potafos, Piracicaba, Brasilpt
dc.description.referenceFixen, P.E., Grove, J.H., Testing soils for phosphorus (1990) Soil Testing and Plant Analysis, pp. 141-180. , R.L. Westerman (ed.) Soil Science Society of America, Madison, WIpt
dc.description.referenceGalrão, E.Z., Sousa, D.M.G., Resposta do trigo a aplicação de cobre em um solo organico (1985) Rev. Bras. Ci. Solo, 9, pp. 149-153pt
dc.description.referenceGalrão, E.Z., Resposta do trigo a aplicação de cobre em um solo organico de várzea (1988) Rev. Bras. Ci. Solo, 12, pp. 275-279pt
dc.description.referenceGimenez, S.M.N., Chaves, J.C.D., Pavan, M.A., Cruces, I.I., Toxicidade de cobre em mudas de cafeeiro (1992) Rev. Bras. Ci. Solo, 16, pp. 361-366pt
dc.description.referenceHouba, V.J.G., Novamsky, I., Temminghoff, E., Soil analysis procedures. Extraction with 0.01M CaCl2 (1994) Soil and Plant Analysis, Part 5A, , Wageningen Agricultural University, Wageningen, The Netherlandspt
dc.description.referenceHylander, L.D., Svensson, H.I., Siman, G., Comparison of different methods for determination of phosphorus in calcium chloride extracts for prediction of availability to plants (1995) Commun. Soil Sci. Plant Anal., 26 (5-6), pp. 913-925pt
dc.description.referenceDe Kreij, C., Van Elderen, C.W., Basar, H., Iron availability in peat substrates as assessed by water, calcium chloride, ammonium acetate, DTPA and calcium chloride/DTPA (1996) Commun. Soil Sci. Plant Anal., 27 (5-8), pp. 1813-1827pt
dc.description.referenceLindsay, W.L., Norvell, W.A., Development of a DTPA soil test for zinc, iron, manganese, and copper (1978) Soil Sci. Soc. Am. J., 42 (3), pp. 421-428pt
dc.description.referenceLindsay, W.L., Cox, F.R., Micronutrient soil testing for the tropics (1985) Micronutrients in Tropical Food Crop Production, pp. 169-200. , P.L.G. Vlek (ed.) M. Nijhoff, Dordrecht, The Netherlandspt
dc.description.referenceLucena, J.J., Bascones, I., AB-DTPA cation extraction in Spanish samples (1993) Commun. Soil Sci. Plant Anal., 24 (17-18), pp. 2427-2440pt
dc.description.referenceMatejovic, I., Durackova, A., Comparison of Mehlich 1, 2, and 3, calcium chloride, Bray, Olsen, Enger, and Schachtschabel extractants for determinations of nutrients in two soil types (1994) Commun. Soil Sci. Plant Anal., 25 (9-10), pp. 1289-1302pt
dc.description.referenceMe Laren, R.G., Crawford, D.V., Studies in copper. I. The fractionation of copper in soils (1973) J. Soil Sci., 24 (2), pp. 172-181pt
dc.description.referenceMehlich, A., (1953), Mehlich, A. 1953. Determination of P, Ca, Mg, K and NH4. (mimeograph). North Carolina Soil Test Division. Raleigh, NCMehlich, A., Mehlich 3 soil test extradant. A modification of Mehlich 2 extradant (1984) Commun. Soil Sci. Plant Anal., 15 (12), pp. 1409-1416pt
dc.description.referenceNorvell, W.A., Comparison of chelating agents as extradants for metals in diverse soil materials (1984) Soil Sci. Soc. Am. J., 48 (3), pp. 1285-1292pt
dc.description.referenceVan Raij, B., Quaggio, J.A., Cantarella, H., De Abreu, C.A., Interpretação de resultados de análise do solo (1996) Recomendações de Adubação e Calagem Para o Estado de São Paulo, pp. 8-13. , B. van Raij, H. Cantarella, J.A. Quaggio, and A.M.G. Furlani (eds.) Instituto Agronomico & Fundação IAC, Campinas, Brazilpt
dc.description.referenceSims, J.T., Comparison of Mehlich 1 and 3 extractants for P, K, Ca, Mg, Mn, Cu and Zn in Atlantic Coastal Plain soils (1989) Commun. Soil Sci. Plant Anal., 20 (17-18), pp. 1707-1726pt
dc.description.referenceValadares, J.M.A.S., Camargo, O., Manganes em solos do Estado de São Paulo (1983) Rev. Bras. Ci. Solo, 7, pp. 123-130pt
dc.description.referenceVocasek, F.F., Friedericks, J.B., Soil micronutrient extraction by Mehlich3 compared to CaCl2-DTPA (1994) Commun. Soil Sci. Plant Anal., 25 (9-10), pp. 1583-1593pt
dc.description.referenceWendt, J.W., Evaluation of the Mehlich-3 soil extractant for upland Malawi soils (1995) Commun. Soil Sci., Plant Anal., 26 (5-6), pp. 687-702pt
Appears in Collections:Unicamp - Artigos e Outros Documentos

Files in This Item:
File Description SizeFormat 
2-s2.0-0031754555.pdf616.84 kBAdobe PDFView/Open

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.