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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#002060;mso-fareast-language:EN-US">Buenas tardes Mónica,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#002060;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#002060;mso-fareast-language:EN-US">El cálculo de RAS en agua o en extractos de suelo puede realizarse a partir de la unidad meq/L o bien a partir de mmol/L (de Na, Ca
y Mg). La diferencia radica en la ecuación a utilizar:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#002060;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<ul style="margin-top:0cm" type="disc">
<li class="MsoNormal" style="color:#002060;mso-list:l0 level1 lfo1"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">Con unidades meq/L, la ecuación del cálculo es:
</span><!--[if gte msEquation 12]><m:oMath><i><span style='font-size:11.0pt;font-family:"Cambria Math",serif;mso-fareast-language:EN-US'><m:r>RAS</m:r><m:r> =</m:r></span></i><m:f><m:fPr><span style='font-family:"Cambria Math",serif;color:#002060;mso-fareast-language:EN-US;font-style:italic'><m:ctrlPr></m:ctrlPr></span></m:fPr><m:num><i><span style='font-size:11.0pt;font-family:"Cambria Math",serif;mso-fareast-language:EN-US'><m:r>Na</m:r></span></i></m:num><m:den><i><span style='font-size:11.0pt;font-family:"Cambria Math",serif;mso-fareast-language:EN-US'><m:r>√</m:r></span></i><m:f><m:fPr><span style='font-family:"Cambria Math",serif;color:#002060;mso-fareast-language:EN-US;font-style:italic'><m:ctrlPr></m:ctrlPr></span></m:fPr><m:num><i><span style='font-size:11.0pt;font-family:"Cambria Math",serif;mso-fareast-language:EN-US'><m:r>(</m:r><m:r>Ca</m:r><m:r>+</m:r><m:r>Mg</m:r><m:r>)</m:r></span></i></m:num><m:den><i><span style='font-size:11.0pt;font-family:"Cambria Math",serif;mso-fareast-language:EN-US'><m:r>2</m:r></span></i></m:den></m:f></m:den></m:f></m:oMath><![endif]--><![if !msEquation]><span style="font-size:12.0pt;font-family:"Times New Roman",serif;position:relative;top:11.5pt;mso-text-raise:-11.5pt;mso-fareast-language:ES-AR"><img width="96" height="32" style="width:1.0in;height:.3333in" id="_x0000_i1025" src="cid:image003.png@01D8CE8C.03388A50"></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US"><o:p></o:p></span></li></ul>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#002060;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<ul style="margin-top:0cm" type="disc">
<li class="MsoNormal" style="color:#002060;mso-list:l0 level1 lfo1"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">Con unidades mmol/L, la ecuación del cálculo es:
</span><!--[if gte msEquation 12]><m:oMath><i><span style='font-size:11.0pt;font-family:"Cambria Math",serif;mso-fareast-language:EN-US'><m:r>RAS</m:r><m:r>=</m:r></span></i><m:f><m:fPr><span style='font-family:"Cambria Math",serif;color:#002060;mso-fareast-language:EN-US;font-style:italic'><m:ctrlPr></m:ctrlPr></span></m:fPr><m:num><i><span style='font-size:11.0pt;font-family:"Cambria Math",serif;mso-fareast-language:EN-US'><m:r>Na</m:r></span></i></m:num><m:den><i><span style='font-size:11.0pt;font-family:"Cambria Math",serif;mso-fareast-language:EN-US'><m:r>√(</m:r><m:r>Ca</m:r><m:r>+</m:r><m:r>Mg</m:r><m:r>)</m:r></span></i></m:den></m:f></m:oMath><![endif]--><![if !msEquation]><span style="font-size:12.0pt;font-family:"Times New Roman",serif;position:relative;top:7.5pt;mso-text-raise:-7.5pt;mso-fareast-language:ES-AR"><img width="99" height="27" style="width:1.0312in;height:.2812in" id="_x0000_i1025" src="cid:image004.png@01D8CE8C.03388A50"></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US"><o:p></o:p></span></li></ul>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#002060;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#002060;mso-fareast-language:EN-US">Siempre se expresa el elemento de interés, NO corresponde expresarlos como carbonato de calcio (ese pasaje se hace para el cálculo
de otro parámetro que es la dureza en agua).<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#002060;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#002060;mso-fareast-language:EN-US">Saludos. Nanci.-<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="ES" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#002060">Dra. Nanci Kloster<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="ES" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#002060">Laboratorio de Suelo y Agua<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="ES" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#002060">INTA Anguil<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="ES" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#002060">Ruta Nac. Nº5 km 580<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="ES" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#002060">Anguil (6326), La Pampa, Argentina<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="ES" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#002060">Tel. 02954 495057 int. 489<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="ES" style="font-size:11.0pt;font-family:"Calibri",sans-serif">De:</span></b><span lang="ES" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> lissamla <lissamla-bounces@listas.agro.uba.ar>
<b>En nombre de </b>Monica Serra<br>
<b>Enviado el:</b> miércoles, 21 de septiembre de 2022 15:32<br>
<b>Para:</b> lisaacs-request@listas.agro.uba.ar; lissamla@agro.uba.ar<br>
<b>Asunto:</b> [LisSAMLA] Consulta RAS<o:p></o:p></span></p>
</div>
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<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif;color:black">Buenas tardes, quería consultar a los laboratorios que hacen el cálculo RAS, en qué unidades utilizan Ca, Mg y Na?. Ya que encontré que tienen que estar en meq/L pero no sé si a
cada uno afectarlo por su peso equivalente o si se pasan todos a meq/L de carbonato de calcio?<o:p></o:p></span></p>
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<div>
<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif;color:black">Muchas gracias!!<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif;color:black">Saludos!!<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif;color:black">Mónica<o:p></o:p></span></p>
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