Salinização do solo em áreas irrigadas: Aspectos físicos e químicos

Authors

  • Maria Conceição Maria da Conceição da Costa de Andrade Vasconcelos Universidade Federal Rural do Semi-Árido

DOI:

https://doi.org/10.30969/acsa.v10i1.402

Keywords:

degradação, salinidade e sodicidade

Abstract

A irrigação no semiárido nordestino se faz necessária para garantir a produtividade das culturas, se constituindo em uma importante alternativa de garantir a produção de alimentos mesmo em períodos de escassez de chuvas (FIGUEIRÊDO, 2005). Porém esse fato pode provocar aumento na densidade do solo, devido ao baixo teor de matéria orgânica em solos tropicais e principalmente, ao excesso de sais na superfície. Os sais se acumulam no solo provocando mudanças nas suas propriedades físicas e químicas, alterando o conteúdo de bases trocáveis no solo, contribuindo com a degradação do solo. Esse processo pode ser agravado pelo a utilização de implementos de forma mais intensa visando a maximização da produção e em condições de excesso de umidade característicos desse sistema de cultivo. O objetivo dessa revisão é abordar os problemas gerados pela prática de irrigação sobre a qualidade dos solos por meio das suas propriedades físicas e químicas, visto que os mesmo estão sujeitos a sofrer mais agressões quando comparados a solos sob sistemas não irrigados.

Author Biography

  • Maria Conceição Maria da Conceição da Costa de Andrade Vasconcelos, Universidade Federal Rural do Semi-Árido
    Aluna do Programa de Pós-Graduação em Manejo de Solo e Água da Universidade Federal Rural do Semi-Árido. Departamento de Ciências Ambientais.

References

<!--[if gte mso 9]><xml> <o:OfficeDocumentSettings> <o:AllowPNG /> </o:OfficeDocumentSettings> </xml><![endif]--> <p class="MsoNormal" style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; text-align: justify; line-height: 150%;"><span style="font-size: 12.0pt; line-height: 150%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;">AGUIAR NETTO, A. O.; </span><span style="font-size: 12.0pt; line-height: 150%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;; mso-fareast-font-family: &quot;Times New Roman&quot;; mso-fareast-language: PT-BR;">GOMES, C. C. S.; LINS, C. C. V.; BARROS, A. C.; CAMPECHE, L. F. S. M.; BLANCO, F. F. </span><span style="font-size: 12.0pt; line-height: 150%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;">Caracter&iacute;sticas qu&iacute;micas e salino-sodicidade dos solos do Per&iacute;metro Irrigado Calif&oacute;rnia-SE, Brasil. <strong style="mso-bidi-font-weight: normal;">Ci&ecirc;ncia Rural,</strong> v.37, n.6, p.1640-1645, 2007. </span></p> <p class="MsoNormal" style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; text-align: justify; line-height: 150%;"><span style="font-size: 12.0pt; line-height: 150%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;">ARATANI, R. G. <strong style="mso-bidi-font-weight: normal;">Qualidade F&iacute;sica e Qu&iacute;mica do Solo sob diferentes Manejos e Condi&ccedil;&otilde;es Edafoclim&aacute;ticas no Estado de S&atilde;o Paulo</strong>. Universidade Estadual Paulista, Jaboticabal, 2008. . 120p. Tese de Doutorado.</span></p> <p class="MsoNormal" style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; text-align: justify; line-height: 150%;"><span style="font-size: 12.0pt; line-height: 150%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;">CAVICHIOLO, S. R. <strong style="mso-bidi-font-weight: normal;">Perdas de Solo e Nutrientes por Eros&atilde;o H&iacute;drica em diferentes M&eacute;todos de Preparo do Solo em Plantio de <em style="mso-bidi-font-style: normal;">Pinus taeda.</em></strong> Universidade Federal do Paran&aacute;, Curitiba, 2005. 139p. <span style="mso-spacerun: yes;">&nbsp;</span>Tese de Doutorado.</span></p> <p class="MsoNormal" style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; text-align: justify; line-height: 150%;"><span style="font-size: 12.0pt; line-height: 150%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;">CHAVES, L. H. G.; MENINO, I. B.; ARA&Uacute;JO, I. A.; CHAVES, I. B. Avalia&ccedil;&atilde;o da fertilidade dos solos das v&aacute;rzeas do munic&iacute;pio de Sousa, PB. <strong style="mso-bidi-font-weight: normal;">Revista Brasileira de Engenharia Agr&iacute;cola e Ambiental</strong>, v.2, n.3, p.262-267, 1998.</span></p> <p class="MsoNormal" style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; text-align: justify; line-height: 150%;"><span style="font-size: 12.0pt; line-height: 150%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;">COLLARES, G. L. <strong style="mso-bidi-font-weight: normal;">Compacta&ccedil;&atilde;o em Latossolos e Argissolo e rela&ccedil;&atilde;o com par&acirc;metros de solo e de plantas.</strong> Universidade Federal de Santa Maria, Santa Maria, 2005. 106 p. Tese de Doutorado.</span></p> <p class="MsoNormal" style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; text-align: justify; line-height: 150%;"><span style="font-size: 12.0pt; line-height: 150%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;; mso-fareast-language: PT-BR;">DIAS, N.S. &amp; F.F. BLANCO. <strong style="mso-bidi-font-weight: normal;">Manejo da Salinidade na Agricultura: Estudos B&aacute;sicos e Aplicados. </strong>Fortaleza: Efeito dos sais no solo e na planta, 2010.</span></p> <p class="MsoNormal" style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; text-align: justify; line-height: 150%;"><span style="font-size: 12.0pt; line-height: 150%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;; mso-fareast-language: PT-BR;">FERREIRA, P.A.; J.B.L. SILVA &amp; H.A. RUIZ. <strong style="mso-bidi-font-weight: normal;">Manejo da Salinidade na Agricultura: Estudos B&aacute;sicos e Aplicados. </strong>Fortaleza: Aspectos f&iacute;sicos e qu&iacute;micos de solos em regi&otilde;es &aacute;ridas e semi&aacute;ridas, 2010.</span></p> <p class="MsoNormal" style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; text-align: justify; line-height: 150%;"><span style="font-size: 12.0pt; line-height: 150%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;">FIGUEIR&Ecirc;DO, A. F. R. <strong style="mso-bidi-font-weight: normal;">An&aacute;lise do risco de saliniza&ccedil;&atilde;o dos solos da Bacia hidrogr&aacute;fica do rio col&ocirc;nia &ndash; sul da Bahia.</strong> Universidade Estadual de Santa Cruz, Ilh&eacute;us, BA, 2005. 84p. <strong style="mso-bidi-font-weight: normal;"><span style="mso-spacerun: yes;">&nbsp;</span></strong>Disserta&ccedil;&atilde;o de Mestrado.</span></p> <p class="MsoNormal" style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; text-align: justify; line-height: 150%;"><span style="font-size: 12.0pt; line-height: 150%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;">GASPARETTO, E. C.; </span><span style="font-size: 12.0pt; line-height: 150%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;; mso-fareast-font-family: &quot;Times New Roman&quot;; mso-fareast-language: PT-BR;">BRAIDA, J. A.; CARNEIRO, M.; SCARIOT, J. J.; TABOLKA, C. L. </span><span style="font-size: 12.0pt; line-height: 150%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;">Grau de Flocula&ccedil;&atilde;o da Argila de um Latossolo Vermelho utilizado com Lavoura e Mata Nativa. <strong style="mso-bidi-font-weight: normal;">Synergismus Scyentifica</strong>, v. 04, n.1, 2009</span></p> <p class="MsoNormal" style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; text-align: justify; line-height: 150%;"><span style="font-size: 12.0pt; line-height: 150%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;">GHEYI, H. R., QUEIROZ, J. E., MEDEIROS, J. F. <strong style="mso-bidi-font-weight: normal;">Manejo e controle da salinidade na agricultura irrigada. </strong>Para&iacute;ba: UFPB, 1997. </span></p> <p class="MsoNormal" style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; text-align: justify; line-height: 150%;"><span style="font-size: 12.0pt; line-height: 150%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;">GLOAGUEN, T. V.; PEREIRA, F. A. C.; GON&Ccedil;ALVES, R. A. B.; PAZ, V. S. Composi&ccedil;&atilde;o Qu&iacute;mica da Solu&ccedil;&atilde;o do Solo nas Diferentes Classes de Poro do Solo. <strong style="mso-bidi-font-weight: normal;">Revista Brasileira de Ci&ecirc;ncia do Solo</strong>, v. 33, p.1105-1113, 2009.</span></p> <p class="MsoNormal" style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; text-align: justify; line-height: 150%;"><span style="font-size: 12.0pt; line-height: 150%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;">GONDIM, R. S. Par&acirc;metros para Preven&ccedil;&atilde;o e Mitiga&ccedil;&atilde;o de Impactos Ambientais no Financiamento da Agricultura Irrigada. In: CONGRESSO BRASILEIRO DE MEIO AMBIENTE, 2000, Fortaleza<strong style="mso-bidi-font-weight: normal;">. Anais</strong>... Fortaleza: Banco do Nordeste do Brasil, 2000. </span></p> <p class="MsoNormal" style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; text-align: justify; line-height: 150%;"><span style="font-size: 12.0pt; line-height: 150%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;">KLEIN, V.A. e LIBARDI, P.L. Densidade e distribui&ccedil;&atilde;o do di&acirc;metro dos poros de um Latossolo Vermelho, sob diferentes sistemas de uso e manejo. <strong style="mso-bidi-font-weight: normal;">Revista Brasileira de Ci&ecirc;ncia do Solo</strong>, v. 26, p.857-867, 2002.</span></p> <p class="MsoNormal" style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; text-align: justify; line-height: 150%;"><span style="font-size: 12.0pt; line-height: 150%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;">LIMA, C. L. R.; PILLON, C. N.; LIMA, A. C. R. Qualidade F&iacute;sica do Solo: Indicadores Quantitativos. <strong style="mso-bidi-font-weight: normal;">Publica&ccedil;&atilde;o Embrapa Clima Temperado,</strong> p. 1-25, 2007. </span></p> <p class="MsoNormal" style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; text-align: justify; line-height: 150%;"><span style="font-size: 12.0pt; line-height: 150%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;">MACHADO, R.; </span><span style="font-size: 12.0pt; line-height: 150%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;; mso-fareast-font-family: &quot;Times New Roman&quot;; mso-fareast-language: PT-BR;">AGUIAR NETTO, A. O.; CAMPECHE, L. F. S. M.; BARROS, A. C. </span><span style="font-size: 12.0pt; line-height: 150%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;">Efeito da Salinidade em Caracter&iacute;sticas F&iacute;sico-H&iacute;dricas em Solos Salino-Sodilizados no Per&iacute;metro Irrigado Jabiberi, SE. <strong style="mso-bidi-font-weight: normal;">Revista Brasileira de Agricultura Irrigada</strong>, v.1, n.1, p.15&ndash;19, 2007. </span></p> <p class="MsoNormal" style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; text-align: justify; line-height: 150%;"><span style="font-size: 12.0pt; line-height: 150%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;; mso-fareast-font-family: &quot;Times New Roman&quot;; mso-fareast-language: PT-BR;">MARIANO, J. L.; PINHEIRO, G. M. T. L. Efici&ecirc;ncia T&eacute;cnica da Agricultura Familiar no Projeto de Irriga&ccedil;&atilde;o do Baixo A&ccedil;u (RN).<strong style="mso-bidi-font-weight: normal;"> Revista Econ&ocirc;mica do Nordeste, </strong>v 40, n.2, 2009.</span></p> <p class="MsoNormal" style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; text-align: justify; line-height: 150%;"><span style="font-size: 12.0pt; line-height: 150%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;">MEDEIROS, J.F.; </span><span style="font-size: 12.0pt; line-height: 150%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;; mso-fareast-font-family: &quot;Times New Roman&quot;; mso-fareast-language: PT-BR;">LISBOA, R. A.; OLIVEIRA, M.; SILVA J&Uacute;NIOR, M. J.; ALVES, L. P. </span><span style="font-size: 12.0pt; line-height: 150%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;">Caracteriza&ccedil;&atilde;o das &aacute;guas subterr&acirc;neas usadas para irriga&ccedil;&atilde;o na &aacute;rea produtora de mel&atilde;o da Chapada do Apodi. <strong style="mso-bidi-font-weight: normal;">Revista Brasileira de Engenharia Agr&iacute;cola e Ambiental</strong>, v.7, n.3, p.469-472, 2003.</span></p> <p class="MsoNormal" style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; text-align: justify; line-height: 150%; tab-stops: 35.45pt;"><span style="font-size: 12.0pt; line-height: 150%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;">MICHELON, C. J. <strong style="mso-bidi-font-weight: normal;">Qualidade f&iacute;sica de solos irrigados do Rio Grande do Sul e do Brasil Central. </strong>Universidade Federal de Santa Maria, Santa Maria, 2005. 92p. Disserta&ccedil;&atilde;o de Mestrado.</span></p> <p class="MsoNormal" style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; text-align: justify; line-height: 150%;"><span style="font-size: 12.0pt; line-height: 150%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;; mso-bidi-font-weight: bold;">MICHELON, C. J.;</span><span style="font-size: 12.0pt; line-height: 150%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;; mso-fareast-font-family: &quot;Times New Roman&quot;; mso-fareast-language: PT-BR;"> CARLESSO, R.; PETRY, M. T.; MELO, G. L.; SPOHR, R. B.; ANDRADE, J. G. </span><span style="font-size: 12.0pt; line-height: 150%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;; mso-bidi-font-weight: bold;">Qualidade f&iacute;sica dos solos irrigados de algumas regi&otilde;es do Brasil Central.<strong> </strong></span><strong style="mso-bidi-font-weight: normal;"><span style="font-size: 12.0pt; line-height: 150%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;">Revista Brasileira de Engenharia Agr&iacute;cola e Ambiental</span></strong><span style="font-size: 12.0pt; line-height: 150%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;">,<strong style="mso-bidi-font-weight: normal;">&nbsp;</strong>v.13&nbsp;n.1, 2009. </span></p> <p class="Default" style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; text-align: justify; line-height: 150%;">PUPIN, B. <strong style="mso-bidi-font-weight: normal;">Propriedades Microbiol&oacute;gicas do Solo Alteradas por Compacta&ccedil;&atilde;o. </strong>Universidade Estadual Paulista, Jaboticabal, 2008. <span style="mso-spacerun: yes;">&nbsp;</span>61p.<span style="mso-spacerun: yes;">&nbsp; </span>Disserta&ccedil;&atilde;o de Mestrado.</p> <p class="MsoNormal" style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; text-align: justify; line-height: 150%; mso-layout-grid-align: none; text-autospace: none;"><span style="font-size: 12.0pt; line-height: 150%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;; mso-fareast-language: PT-BR;">RIBEIRO, M.R. <strong style="mso-bidi-font-weight: normal;">Manejo da Salinidade na Agricultura: Estudos B&aacute;sicos e Aplicados.</strong> Fortaleza: Origem e classifica&ccedil;&atilde;o dos solos afetados por sais, 2010. </span></p> <p class="MsoNormal" style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; text-align: justify; line-height: 150%; mso-layout-grid-align: none; text-autospace: none;"><span style="font-size: 12.0pt; line-height: 150%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;">S&Aacute;, I. B.; </span><span style="font-size: 12.0pt; line-height: 150%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;; mso-fareast-font-family: &quot;Times New Roman&quot;; mso-fareast-language: PT-BR;">CUNHA, J. F; TEIXEIRA, A. H. C; ANGELOTTI, F.; DRUMOND, M. A. </span><strong style="mso-bidi-font-weight: normal;"><span style="font-size: 12.0pt; line-height: 150%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;">Desertifica&ccedil;&atilde;o no Semi&aacute;rido brasileiro. </span></strong><span style="font-size: 12.0pt; line-height: 150%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;">In:<strong style="mso-bidi-font-weight: normal;"> </strong>2&ordf; Confer&ecirc;ncia Internacional: Clima, Sustentabilidade e Desenvolvimento em Regi&otilde;es Semi&aacute;ridas. Fortaleza, CE, 2010.</span></p> <p class="MsoNormal" style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; text-align: justify; line-height: 150%;"><span style="font-size: 12.0pt; line-height: 150%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;">SANCHEZ, E.<strong style="mso-bidi-font-weight: normal;"> Propriedades f&iacute;sicas do solo e Produtividade de soja em sucess&atilde;o a Plantas de cobertura de inverno.</strong> Universidade Estadual do Centro-Oeste, Guarapuava, 2012. 48p. Disserta&ccedil;&atilde;o de Mestrado.</span></p> <p class="MsoNormal" style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; text-align: justify; line-height: 150%;"><span style="font-size: 12.0pt; line-height: 150%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;">SANTANA, M. J.; CARVALHO, J. A.; SOUZA, K. J.; SOUSA, A. M. G.; VASCONCELOS, C. L.; ANDRADE, L. A. B. Efeitos da salinidade da &aacute;gua de irriga&ccedil;&atilde;o na brota&ccedil;&atilde;o e desenvolvimento inicial da cana-de-a&ccedil;&uacute;car (<em style="mso-bidi-font-style: normal;">saccharum</em> spp) e em solos com diferentes n&iacute;veis texturais. <strong style="mso-bidi-font-weight: normal;">Ci&ecirc;ncia Agrotecnica</strong>, v. 31, n. 5, p. 1470-1476, set./out., 2007.</span></p> <p class="MsoNormal" style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; text-align: justify; line-height: 150%; tab-stops: 35.45pt;"><span style="font-size: 12.0pt; line-height: 150%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;">SANTOS, E. E. F.; RIBEIRO, M. R. Influ&ecirc;ncia da irriga&ccedil;&atilde;o e do cultivo nas propriedades qu&iacute;micas de solos da regi&atilde;o do subm&eacute;dio S&atilde;o Francisco. <strong style="mso-bidi-font-weight: normal;">Acta Scientiarum,</strong> v. 24, n. 5, p. 1507-1516, 2002.</span></p> <p class="MsoNormal" style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; text-align: justify; line-height: 150%;"><span style="font-size: 12.0pt; line-height: 150%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;">SILVA, B. C. G.; MACIEL, L. N. Q.; ARA&Uacute;JO, M. S. B. Limita&ccedil;&otilde;es ao Cultivo em &Aacute;reas Irrigadas de Bel&eacute;m de S&atilde;o Francisco, Estado de Pernambuco, Brasil. <strong style="mso-bidi-font-weight: normal;">Acta Scientiarum Agronomy, </strong>v. 27, n. 2, p. 343-347, 2005.</span></p> <p class="MsoNormal" style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; text-align: justify; line-height: 150%;"><span style="font-size: 12.0pt; line-height: 150%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;">SILVA, M. S. L.; CHAVES, V. C.; CAVALCANTI, A. C.; OLIVEIRA NETO, M. B.; SANTO, J. C. P.; MENDES, A. M. S.; ANJOS, J. B. Adensamento e compacta&ccedil;&atilde;o de solos irrig&aacute;veis da zona semi-&aacute;rida do Nordeste brasileiro,<strong style="mso-bidi-font-weight: normal;"> Publica&ccedil;&atilde;o Embrapa Solos UEP Nordeste, </strong>2007. </span></p> <p class="MsoNormal" style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; text-align: justify; line-height: 150%;"><span style="font-size: 12.0pt; line-height: 150%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;">SILVA, M. S. L.; CAVALCANTI, A. C.; GOMES, T. C. A.; ANJOS, J. B. Solos adensados e / ou compactados: Identifica&ccedil;&atilde;o/diagnostico e alternativas de manejo,<strong style="mso-bidi-font-weight: normal;"> Publica&ccedil;&atilde;o Embrapa Semi-&aacute;riodo,</strong> Petrolina, PE, 2001.</span></p> <p class="MsoNormal" style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; text-align: justify; line-height: 150%;"><span style="font-size: 12.0pt; line-height: 150%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;; mso-ansi-language: EN-US;" lang="EN-US">USSL STAFF - United States Salinity Laboratory. <strong style="mso-bidi-font-weight: normal;">Diagnosis and improvement of saline and alkali soils.</strong> Washington: U.S. Department of Agriculture, 1954. </span></p> <!--[if gte mso 9]><xml> <w:WordDocument> <w:View>Normal</w:View> <w:Zoom>0</w:Zoom> <w:TrackMoves /> <w:TrackFormatting /> <w:HyphenationZone>21</w:HyphenationZone> <w:PunctuationKerning /> <w:ValidateAgainstSchemas /> 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Published

2014-06-15

Issue

Section

Original Articles / Artigos de Pesquisa