<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>2730-5066</journal-id>
<journal-title><![CDATA[Agrociencia Uruguay]]></journal-title>
<abbrev-journal-title><![CDATA[Agrocienc. Urug.]]></abbrev-journal-title>
<issn>2730-5066</issn>
<publisher>
<publisher-name><![CDATA[Facultad de Agronomía - Instituto de Nacional de Investigación Agropecuaria]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2730-50662021000301310</article-id>
<article-id pub-id-type="doi">10.31285/agro.25.412</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Nitrogen fertilization strategies for center-pivot irrigated maize crop]]></article-title>
<article-title xml:lang="es"><![CDATA[Alternativas de fertilización nitrogenada en maíz bajo riego por pivot central]]></article-title>
<article-title xml:lang="pt"><![CDATA[Alternativas de fertilização com nitrogênio no milho sob irrigação por pivô central]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ernst]]></surname>
<given-names><![CDATA[J. M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Beretta]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Barbazán]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Puppo]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de la República Facultad de Agronomía ]]></institution>
<addr-line><![CDATA[Montevideo ]]></addr-line>
<country>Uruguay</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2021</year>
</pub-date>
<volume>25</volume>
<numero>2</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_arttext&amp;pid=S2730-50662021000301310&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_abstract&amp;pid=S2730-50662021000301310&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_pdf&amp;pid=S2730-50662021000301310&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: In the last 15 years, there has been an expansion of the use of center-pivots for irrigation in Uruguay. This equipment allows the application of diluted fertilizer in the irrigation water. The study aimed to generate information on fertilization strategies with nitrogen (N) in irrigated maize crops. A study was performed where five treatments were evaluated: T0, without additional nitrogen fertilization to the basal sowing fertilization; C0, cover fertilization with 150 Kg N ha-1 split in three (V3) and seven leaves (V7); F1, idem &#8220;C0&#8221; but with liquid fertilizer in water; F2, 150 Kg N ha-1 as liquid fertilizer in water split weekly from V3 to reproductive stage (R1); F3, idem "F2" but with 225 Kg N ha-1. Irrigation was done according to water balance and the soil moisture was measured with an FDR probe. The N plant level and biomass were evaluated in states V3, V6, R1 and physiological maturity (R6). The grain yield was determined at harvest. The correlation between the color values and Color Index (InCol) was analyzed in R1 using aerial photography and software, with: % N; biomass; Nitrogen Sufficiency Index (NSI); and grain yield (kg ha-1). The yield was higher in the treatment with the highest N dose, with no significant differences. No differences were found between the sources of N (sulfur urea and Fertec®) for the evaluated variables. A high correlation was obtained between the colors and the InCol and the cultivation variables.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: En los últimos 15 años, ha habido una expansión del uso de pivotes centrales para riego en Uruguay. Estos equipos permiten la aplicación de fertilizante con el riego. El objetivo fue generar información sobre estrategias de fertilización con nitrógeno (N) en maíz regado. Se instaló un experimento con 5 tratamientos: T0, sin fertilización nitrogenada adicional a la basal de la siembra; C0, fertilización en cobertura con 150 kg N ha-1 fraccionado en tres (V3) y siete hojas (V7) de estado de desarrollo; F1, ídem a &#8220;C0&#8221; pero con fertilizante diluido en agua; F2,150 kg N ha-1 como fertilizante diluido en agua, fraccionado semanalmente desde V3 hasta estado reproductivo (R1); F3, ídem a &#8220;F2&#8221; pero con 225 kg N ha-1. Se manejó el riego a partir de un balance hídrico y se midió la humedad en el suelo con sonda FDR. Se evaluó contenido de N en planta y biomasa en los estados V3, V6, R1 y madurez fisiológica (R6). A cosecha se determinó el rendimiento en grano. En R1 mediante foto aérea del cultivo y software se analizó la correlación entre los valores de color e Índice de Color (InCol) con: %N; biomasa; Índice de Suficiencia de Nitrógeno (ISN); y rendimiento de grano (kg ha-1). El rendimiento fue superior en el tratamiento con mayor dosis de N, sin detectar diferencias significativas. No se encontraron diferencias entre las fuentes de N (urea azufrada y Fertec®). Se obtuvo alta correlación entre los colores e InCol y las variables del cultivo analizadas.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo: Nos últimos 15 anos, no Uruguai, houve uma expansão do uso de pivôs centrais para irrigação. Esses equipamentos permitem a aplicação de fertilizantes diluídos nas irrigaçãoes. O objetivo foi gerar informações sobre estratégias de fertilização com nitrogênio (N) no milho irrigado. Foram avaliados 5 tratamentos: T0, sem fertilização com nitrogênio adicional à fertilização de base da semeadura; C0, adubação em cobertura com 150 kg N ha-1 dividido em três (V3) e sete (V7) folhas do estádio de desenvolvimento; F1, igual a &#8220;C0&#8221; mas com fertilizante diluído em água; F2, 150 kg N ha-1 como fertilizante diluído em água, fracionado semanalmente de V3 ao estado reprodutivo (R1); F3, idem para &#8220;F2&#8221; mas com 225 kg N ha-1. Foi regado de acordo com o balanço hídrico e a umidade do solo foi medida com uma sonda FDR. A concentração de N da planta e biomassa foram avaliadas nos estágios V3, V6, R1 e maturidade fisiológica (R6). Na colheita, foi determinado o rendimento de grãos. No R1, por meio de foto aérea e software, foi analisada a correlação entre os valores de cor e o Índice de Cor (InCol) com:% N; biomassa; Índice de Suficiência de Nitrogênio (ISN); e rendimento de grãos (kg ha-1). O desempenho foi superior no tratamento com a maior dose de N, sem detectar diferenças significativas. Não foram encontradas diferenças entre as fontes de N (enxofre uréia e Fertec®). Uma alta correlação foi obtida entre as cores e o InCol e as variáveis de cultivo analisadas.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[corn]]></kwd>
<kwd lng="en"><![CDATA[fertilization]]></kwd>
<kwd lng="en"><![CDATA[nitrogen]]></kwd>
<kwd lng="en"><![CDATA[irrigation]]></kwd>
<kwd lng="en"><![CDATA[dosage]]></kwd>
<kwd lng="es"><![CDATA[maíz, fertilización]]></kwd>
<kwd lng="es"><![CDATA[nitrógeno]]></kwd>
<kwd lng="es"><![CDATA[riego]]></kwd>
<kwd lng="es"><![CDATA[dosificación]]></kwd>
<kwd lng="pt"><![CDATA[milho]]></kwd>
<kwd lng="pt"><![CDATA[fertilização]]></kwd>
<kwd lng="pt"><![CDATA[nitrogênio]]></kwd>
<kwd lng="pt"><![CDATA[irrigação]]></kwd>
<kwd lng="pt"><![CDATA[dosagem]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<label>1.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Morceli]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[El mercado mundial del maíz]]></article-title>
<source><![CDATA[El mercado del maíz en los países del CAS]]></source>
<year>2014</year>
<page-range>9-16</page-range><publisher-loc><![CDATA[Montevideo ]]></publisher-loc>
<publisher-name><![CDATA[CAS]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B2">
<label>2.</label><nlm-citation citation-type="book">
<collab>Ministerio de Ganadería, Agricultura y Pesca, DIEA (UY)</collab>
<source><![CDATA[Anuario estadístico agropecuario]]></source>
<year>2017</year>
<publisher-loc><![CDATA[Montevideo ]]></publisher-loc>
<publisher-name><![CDATA[MGAP]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B3">
<label>3.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Giménez]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[¿Cuánto estamos perdiendo por no regar cultivos en Uruguay?]]></article-title>
<source><![CDATA[Riego en cultivos y pasturas]]></source>
<year>2012</year>
<page-range>35-41</page-range><publisher-loc><![CDATA[Montevideo ]]></publisher-loc>
<publisher-name><![CDATA[INIA]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B4">
<label>4.</label><nlm-citation citation-type="book">
<collab>Ministerio de Ganadería, Agricultura y Pesca, DIEA (UY)</collab>
<source><![CDATA[Encuesta agrícola: invierno 2016]]></source>
<year>2016</year>
<publisher-loc><![CDATA[Montevideo ]]></publisher-loc>
<publisher-name><![CDATA[MGAP]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B5">
<label>5.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sawchik]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Ceretta]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Consumo de agua por sojas de distintos grupos de madurez en diferentes ambientes de producción (CALMER-AUSID-INIA)]]></article-title>
<source><![CDATA[Jornada técnica de cultivos de verano]]></source>
<year>2005</year>
<page-range>41-5</page-range><publisher-loc><![CDATA[Montevideo ]]></publisher-loc>
<publisher-name><![CDATA[INIA]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B6">
<label>6.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Giménez]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[García Petillo]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Evapotranspiración de cultivos de verano para dos regiones climáticamente contrastantes de Uruguay]]></article-title>
<source><![CDATA[Agrociencia Uruguay]]></source>
<year>2011</year>
<volume>15</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>100-8</page-range></nlm-citation>
</ref>
<ref id="B7">
<label>7.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Castaño]]></surname>
<given-names><![CDATA[JP]]></given-names>
</name>
<name>
<surname><![CDATA[Gimenez]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Ceroni]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Forest]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Aunchayna]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<source><![CDATA[Caracterización agroclimática del Uruguay 1980-2009]]></source>
<year>2011</year>
<publisher-loc><![CDATA[Montevideo ]]></publisher-loc>
<publisher-name><![CDATA[INIA]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B8">
<label>8.</label><nlm-citation citation-type="book">
<collab>Ministerio de Ganadería, Agricultura y Pesca, DGRN (UY)</collab>
<source><![CDATA[Instructivo para la importacion de equipos de riego con fines agropecuarios]]></source>
<year>2016</year>
<publisher-loc><![CDATA[Montevideo ]]></publisher-loc>
<publisher-name><![CDATA[MGAP]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B9">
<label>9.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ciampitti]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[García]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Balance y eficiencia de uso de los nutrientes en sistemas agrícolas]]></article-title>
<source><![CDATA[Rev horiz]]></source>
<year>2008</year>
<volume>4</volume>
<numero>18</numero>
<issue>18</issue>
<page-range>22-8</page-range></nlm-citation>
</ref>
<ref id="B10">
<label>10.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cadahía]]></surname>
<given-names><![CDATA[LC]]></given-names>
</name>
</person-group>
<source><![CDATA[Fertirrigación: cultivos hortícolas, frutales y ornamentales]]></source>
<year>2005</year>
<publisher-loc><![CDATA[Madrid ]]></publisher-loc>
<publisher-name><![CDATA[Mundi-Prensa Libros]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B11">
<label>11.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lamm]]></surname>
<given-names><![CDATA[FR]]></given-names>
</name>
<name>
<surname><![CDATA[Schlegel]]></surname>
<given-names><![CDATA[AJ]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Nitrogen fertilization for corn production when using lepa center pivot sprinklers]]></article-title>
<source><![CDATA[National Irrigation Symposium: proceedings of the 4th decennial symposium, November 14-16 2000, Phoenix, Arizona]]></source>
<year>2000</year>
<page-range>14-6</page-range><publisher-loc><![CDATA[St. Joseph ]]></publisher-loc>
<publisher-name><![CDATA[American Society of Agricultural Engineers]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B12">
<label>12.</label><nlm-citation citation-type="book">
<source><![CDATA[Guía técnica Dekalb 2013]]></source>
<year>2013</year>
<publisher-loc><![CDATA[(place unknown) ]]></publisher-loc>
<publisher-name><![CDATA[Dekalab]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B13">
<label>13.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Altamirano]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Da Silva]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Durán]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Echeverría]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Panario]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Puentes]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<source><![CDATA[Carta de reconocimiento de suelos del Uruguay: clasificación de suelos]]></source>
<year>1976</year>
<publisher-loc><![CDATA[Montevideo ]]></publisher-loc>
<publisher-name><![CDATA[MAP]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B14">
<label>14.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Urrestarazu]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Tratado de cultivo sin suelo]]></source>
<year>2004</year>
<edition>3rd ed</edition>
<publisher-loc><![CDATA[Madrid ]]></publisher-loc>
<publisher-name><![CDATA[Mundi-Prensa]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B15">
<label>15.</label><nlm-citation citation-type="book">
<collab>IPNI</collab>
<source><![CDATA[Cálculo de Requerimientos Nutricionales - Versión 2016: cultivos de cereales, oleaginosas, leguminosas, industriales, forrajeras y hortalizas]]></source>
<year>2016</year>
<publisher-loc><![CDATA[Buenos Aires ]]></publisher-loc>
<publisher-name><![CDATA[IPNI]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B16">
<label>16.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rhoads]]></surname>
<given-names><![CDATA[FM]]></given-names>
</name>
<name>
<surname><![CDATA[Mansell]]></surname>
<given-names><![CDATA[RS]]></given-names>
</name>
<name>
<surname><![CDATA[Hammond]]></surname>
<given-names><![CDATA[LS]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Influence of Water and Fertilizer Management on Yield and Water-input Efficiency of Corn]]></article-title>
<source><![CDATA[Agron J]]></source>
<year>1978</year>
<volume>70</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>305-8</page-range></nlm-citation>
</ref>
<ref id="B17">
<label>17.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Allen]]></surname>
<given-names><![CDATA[RG]]></given-names>
</name>
<name>
<surname><![CDATA[Pereira]]></surname>
<given-names><![CDATA[LS]]></given-names>
</name>
<name>
<surname><![CDATA[Raes]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Smith]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<source><![CDATA[Crop evapotranspiration: guidelines for computing crop water requirements]]></source>
<year>1998</year>
<publisher-loc><![CDATA[Rome ]]></publisher-loc>
<publisher-name><![CDATA[FAO]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B18">
<label>18.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Marano]]></surname>
<given-names><![CDATA[RP]]></given-names>
</name>
<name>
<surname><![CDATA[Ledesma]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Camussi]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Carnevale]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Uso de sondas FDR para balance de agua en suelo: calibración y aplicación]]></article-title>
<source><![CDATA[Actas XIX Congreso Latinoamericano y XXIII Congreso Argentino de la Ciencia del Suelo]]></source>
<year>2012</year>
<publisher-loc><![CDATA[Mar del Plata (AR) ]]></publisher-loc>
<publisher-name><![CDATA[MNEMOSYNE]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B19">
<label>19.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Heermann]]></surname>
<given-names><![CDATA[DF]]></given-names>
</name>
<name>
<surname><![CDATA[Hein]]></surname>
<given-names><![CDATA[PR]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Performance characteristics of self-propped center pivot sprinkler irrigation system]]></article-title>
<source><![CDATA[Trans ASAE]]></source>
<year>1968</year>
<volume>11</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>11-5</page-range></nlm-citation>
</ref>
<ref id="B20">
<label>20.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Tarjuelo]]></surname>
<given-names><![CDATA[JM]]></given-names>
</name>
</person-group>
<source><![CDATA[El riego por aspersión y su tecnología]]></source>
<year>2005</year>
<edition>3rd ed</edition>
<publisher-loc><![CDATA[Madrid ]]></publisher-loc>
<publisher-name><![CDATA[Mundi-Prensa]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B21">
<label>21.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bouyoucos]]></surname>
<given-names><![CDATA[GJ]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Hydrometer method improved for making particle size analysis of soil]]></article-title>
<source><![CDATA[Agron J.]]></source>
<year>1962</year>
<volume>54</volume>
<page-range>464-5</page-range></nlm-citation>
</ref>
<ref id="B22">
<label>22.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Walkley]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Black]]></surname>
<given-names><![CDATA[TA]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[An examination of the Degtjareff method for determining soil organic matter, and a proposed modification of the chromic acid titration method]]></article-title>
<source><![CDATA[Soil Sci]]></source>
<year>1934</year>
<volume>37</volume>
<page-range>29-38</page-range></nlm-citation>
</ref>
<ref id="B23">
<label>23.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mulvaney]]></surname>
<given-names><![CDATA[RL]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Nitrogen-inorganic forms]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Sparks]]></surname>
<given-names><![CDATA[DL]]></given-names>
</name>
<name>
<surname><![CDATA[Page]]></surname>
<given-names><![CDATA[AL]]></given-names>
</name>
<name>
<surname><![CDATA[Helmke]]></surname>
<given-names><![CDATA[PA]]></given-names>
</name>
<name>
<surname><![CDATA[Loeppert]]></surname>
<given-names><![CDATA[RH]]></given-names>
</name>
<name>
<surname><![CDATA[Soltanpour]]></surname>
<given-names><![CDATA[PN]]></given-names>
</name>
<name>
<surname><![CDATA[Tabatabai]]></surname>
<given-names><![CDATA[MA]]></given-names>
</name>
<name>
<surname><![CDATA[Johnston]]></surname>
<given-names><![CDATA[CT]]></given-names>
</name>
<name>
<surname><![CDATA[Sumner]]></surname>
<given-names><![CDATA[ME]]></given-names>
</name>
</person-group>
<source><![CDATA[Methods of soil analysis: Part 3. Chemical methods]]></source>
<year>1996</year>
<page-range>1123-84</page-range><publisher-loc><![CDATA[Madison (WI) ]]></publisher-loc>
<publisher-name><![CDATA[American Society of Agronomy]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B24">
<label>24</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bray]]></surname>
<given-names><![CDATA[RH]]></given-names>
</name>
<name>
<surname><![CDATA[Kurtz]]></surname>
<given-names><![CDATA[LT]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Determination of total, organic and available forms of phosphorus in soil]]></article-title>
<source><![CDATA[Soil Sci]]></source>
<year>1945</year>
<volume>59</volume>
<page-range>39-45</page-range></nlm-citation>
</ref>
<ref id="B25">
<label>25.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jackson]]></surname>
<given-names><![CDATA[ML]]></given-names>
</name>
</person-group>
<source><![CDATA[Análisis químico de suelos]]></source>
<year>1964</year>
<publisher-loc><![CDATA[Barcelona ]]></publisher-loc>
<publisher-name><![CDATA[Ediciones Omega]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B26">
<label>26.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bremmer]]></surname>
<given-names><![CDATA[JM]]></given-names>
</name>
<name>
<surname><![CDATA[Mulvaney]]></surname>
<given-names><![CDATA[CS]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Nitrogen total]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Page]]></surname>
<given-names><![CDATA[AL]]></given-names>
</name>
<name>
<surname><![CDATA[Miller]]></surname>
<given-names><![CDATA[RH]]></given-names>
</name>
<name>
<surname><![CDATA[Keeney]]></surname>
<given-names><![CDATA[DR]]></given-names>
</name>
</person-group>
<source><![CDATA[Methods of Soil Analysis: Part 2. Chemical and Microbiological Properties]]></source>
<year>1982</year>
<page-range>595-624</page-range><publisher-loc><![CDATA[Madison (WI) ]]></publisher-loc>
<publisher-name><![CDATA[American Society of Agronomy]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B27">
<label>27.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ritchie]]></surname>
<given-names><![CDATA[W]]></given-names>
</name>
<name>
<surname><![CDATA[Hanway]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<source><![CDATA[How a corn plant develops]]></source>
<year>1997</year>
<publisher-loc><![CDATA[Iowa ]]></publisher-loc>
<publisher-name><![CDATA[State University of Science and Technology]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B28">
<label>28.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lemaire]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Gastal]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Quantifying crop responses to nitrogen and avenues to improve nitrogen-use efficiency]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Lemaire]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Gastal]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Durand]]></surname>
<given-names><![CDATA[JL]]></given-names>
</name>
<name>
<surname><![CDATA[Louarn]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
</person-group>
<source><![CDATA[Crop physiology]]></source>
<year>2015</year>
<page-range>161-206</page-range><publisher-loc><![CDATA[Lusignan ]]></publisher-loc>
<publisher-name><![CDATA[Academic Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B29">
<label>29.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Iqbal]]></surname>
<given-names><![CDATA[Z]]></given-names>
</name>
<name>
<surname><![CDATA[Latif]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Ali]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Iqbal]]></surname>
<given-names><![CDATA[MM]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effect of fertigated phosphorus on P use efficiency and yield of wheat and maize]]></article-title>
<source><![CDATA[Songklanakarin J Sci Technol]]></source>
<year>2003</year>
<volume>25</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>697-702</page-range></nlm-citation>
</ref>
<ref id="B30">
<label>30.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Allen]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<source><![CDATA[Evapotranspiración del cultivo: guías para la determinación de los requerimientos de agua de los cultivos]]></source>
<year>2006</year>
<publisher-loc><![CDATA[Roma ]]></publisher-loc>
<publisher-name><![CDATA[FAO]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B31">
<label>31.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Caviglia]]></surname>
<given-names><![CDATA[O]]></given-names>
</name>
<name>
<surname><![CDATA[Sadras]]></surname>
<given-names><![CDATA[V]]></given-names>
</name>
<name>
<surname><![CDATA[Andrade]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Modelling long-term effects of cropping intensification reveals increased water and radiation productivity in the south-eastern Pampas]]></article-title>
<source><![CDATA[Field Crops Res]]></source>
<year>2013</year>
<volume>149</volume>
<page-range>300-11</page-range></nlm-citation>
</ref>
<ref id="B32">
<label>32.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Trenbath]]></surname>
<given-names><![CDATA[BR]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Resource use by intercrops]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Francis]]></surname>
<given-names><![CDATA[CA]]></given-names>
</name>
</person-group>
<source><![CDATA[Multiple cropping systems]]></source>
<year>1986</year>
<page-range>57-81</page-range><publisher-loc><![CDATA[New York ]]></publisher-loc>
<publisher-name><![CDATA[MPC]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B33">
<label>33.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Di Rienzo]]></surname>
<given-names><![CDATA[JA]]></given-names>
</name>
<name>
<surname><![CDATA[Casanoves]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Balzarini]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Gonzalez]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Tablada]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Robledo]]></surname>
<given-names><![CDATA[CW]]></given-names>
</name>
</person-group>
<source><![CDATA[InfoStat]]></source>
<year>2016</year>
<publisher-loc><![CDATA[Córdoba ]]></publisher-loc>
<publisher-name><![CDATA[Universidad Nacional de Córdoba, Facultad de Ciencias Agropecuarias]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B34">
<label>34.</label><nlm-citation citation-type="book">
<collab>INIA</collab>
<source><![CDATA[Banco de datos agroclimáticos]]></source>
<year>1900</year>
<publisher-loc><![CDATA[Montevideo ]]></publisher-loc>
<publisher-name><![CDATA[INIA]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B35">
<label>35.</label><nlm-citation citation-type="book">
<collab>USDA</collab>
<source><![CDATA[Guide Soil Quality Test Kit Guide]]></source>
<year>1999</year>
<publisher-loc><![CDATA[Washington ]]></publisher-loc>
<publisher-name><![CDATA[USDA]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B36">
<label>36.</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Piedrahíta]]></surname>
<given-names><![CDATA[O]]></given-names>
</name>
</person-group>
<source><![CDATA[Acidez del suelo]]></source>
<year>2009</year>
</nlm-citation>
</ref>
<ref id="B37">
<label>37.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Barbazán]]></surname>
<given-names><![CDATA[MM]]></given-names>
</name>
<name>
<surname><![CDATA[Bordoli]]></surname>
<given-names><![CDATA[JM]]></given-names>
</name>
<name>
<surname><![CDATA[Coitiño]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[del Pino]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Hoffman]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Mazzilli]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Avances en estudios de potasio en Uruguay]]></article-title>
<source><![CDATA[Nutrición de los cultivos para la intensificación productiva sustentable]]></source>
<year>2013</year>
<page-range>151-5</page-range><publisher-loc><![CDATA[Acassuso ]]></publisher-loc>
<publisher-name><![CDATA[IPNI]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B38">
<label>38.</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Perdomo]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
</person-group>
<source><![CDATA[Recomendación de Dosis de Fertilización]]></source>
<year>2021</year>
</nlm-citation>
</ref>
<ref id="B39">
<label>39.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pizarro]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
</person-group>
<source><![CDATA[Riego localizado de alta frecuencia]]></source>
<year>1990</year>
<edition>2nd ed</edition>
<publisher-loc><![CDATA[Madrid ]]></publisher-loc>
<publisher-name><![CDATA[Mundi-Prensa]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B40">
<label>40.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Teixeira de Mello]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
</person-group>
<source><![CDATA[Efecto del uso del suelo sobre la calidad del agua y las comunidades de peces en sistemas lóticos de la cuenca baja del Río Santa Lucía (Uruguay)]]></source>
<year>2007</year>
<publisher-loc><![CDATA[Montevideo (UY) ]]></publisher-loc>
<publisher-name><![CDATA[Universidad de la República, Facultad de Ciencias]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B41">
<label>41.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lafitte]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Fisiología del maíz tropical]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Paliwal]]></surname>
<given-names><![CDATA[RL]]></given-names>
</name>
<name>
<surname><![CDATA[Granados]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Lafitte]]></surname>
<given-names><![CDATA[HR]]></given-names>
</name>
<name>
<surname><![CDATA[Violic]]></surname>
<given-names><![CDATA[AD]]></given-names>
</name>
</person-group>
<source><![CDATA[El maíz en los trópicos: mejoramiento y producción]]></source>
<year>2001</year>
<publisher-loc><![CDATA[Roma ]]></publisher-loc>
<publisher-name><![CDATA[FAO]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B42">
<label>42.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rodríguez]]></surname>
<given-names><![CDATA[LA]]></given-names>
</name>
<name>
<surname><![CDATA[Sombrero]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Cedrán]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Efectos de la fertilización nitrogenada en el cultivo de maíz]]></article-title>
<source><![CDATA[Tierras de Castilla y León: Agricultura]]></source>
<year>2014</year>
<numero>223</numero>
<issue>223</issue>
<page-range>44-51</page-range></nlm-citation>
</ref>
<ref id="B43">
<label>43.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Soto]]></surname>
<given-names><![CDATA[O]]></given-names>
</name>
<name>
<surname><![CDATA[Jahn]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
<name>
<surname><![CDATA[Arredondo]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Mejoramiento del porcentaje de proteína en maíz para ensilaje con el aumento y parcialización de la fertilización nitrogenada]]></article-title>
<source><![CDATA[Agric Téc]]></source>
<year>2004</year>
<volume>64</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>156-62</page-range></nlm-citation>
</ref>
<ref id="B44">
<label>44.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ruiz]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Características nutritivas de hojas verdes y secas de maíz destinado a ensilaje]]></article-title>
<source><![CDATA[Agric Téc (Chile)]]></source>
<year>1993</year>
<volume>53</volume>
<page-range>356-8</page-range></nlm-citation>
</ref>
<ref id="B45">
<label>45.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Barrios]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Basso]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Efecto de la fertilización nitrogenada sobre componentes del rendimiento y calidad nutricional del grano de seis híbridos de maíz]]></article-title>
<source><![CDATA[Bioagro]]></source>
<year>2018</year>
<volume>30</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>39-48</page-range></nlm-citation>
</ref>
<ref id="B46">
<label>46.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Tanaka]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Yamaguchi]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<source><![CDATA[Producción de materia seca, componentes de rendimiento y rendimiento de grano en maíz]]></source>
<year>1981</year>
<publisher-loc><![CDATA[Chapingo ]]></publisher-loc>
<publisher-name><![CDATA[Rama de botánica]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B47">
<label>47.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bravo]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Chan]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Relaciones agua-suelo-planta atmósfera del maíz de riego en zonas semiáridas]]></article-title>
<source><![CDATA[Terra]]></source>
<year>1987</year>
<volume>5</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>132-9</page-range></nlm-citation>
</ref>
<ref id="B48">
<label>48.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lemcoff]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Loomis]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Nitrogen influences on yield determination in maize 1]]></article-title>
<source><![CDATA[Crop Sci]]></source>
<year>1986</year>
<volume>26</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>1017-22</page-range></nlm-citation>
</ref>
<ref id="B49">
<label>49.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Blumenthal]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Lyon]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Stroup]]></surname>
<given-names><![CDATA[W]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Optimal plant population and nitrogen fertility for dryland corn in western Nebraska]]></article-title>
<source><![CDATA[Agron J.]]></source>
<year>2003</year>
<volume>95</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>878-3</page-range></nlm-citation>
</ref>
<ref id="B50">
<label>50.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pietrobón]]></surname>
<given-names><![CDATA[MH]]></given-names>
</name>
<name>
<surname><![CDATA[Imvinkelried]]></surname>
<given-names><![CDATA[O]]></given-names>
</name>
<name>
<surname><![CDATA[Dellaferrera]]></surname>
<given-names><![CDATA[IM]]></given-names>
</name>
<name>
<surname><![CDATA[Montenegro]]></surname>
<given-names><![CDATA[AJ]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Eficiencia de uso de los recursos, productividad producción en maíz según diferentes cultivos antecesores]]></article-title>
<source><![CDATA[FAVE Secc Cienc agrar]]></source>
<year>2016</year>
<volume>15</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>74-84</page-range></nlm-citation>
</ref>
<ref id="B51">
<label>51.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pedrol]]></surname>
<given-names><![CDATA[HM]]></given-names>
</name>
<name>
<surname><![CDATA[Castellarín]]></surname>
<given-names><![CDATA[JM]]></given-names>
</name>
<name>
<surname><![CDATA[Ferraguti]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Rosso]]></surname>
<given-names><![CDATA[O]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Respuesta a la fertilización nitrogenada y eficiencia en el uso del agua en el cultivo de maíz según nivel hídrico]]></article-title>
<source><![CDATA[Inf agron Cono Sur]]></source>
<year>2008</year>
<numero>40</numero>
<issue>40</issue>
<page-range>17-20</page-range></nlm-citation>
</ref>
<ref id="B52">
<label>52.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Fontanetto]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Keller]]></surname>
<given-names><![CDATA[O]]></given-names>
</name>
<name>
<surname><![CDATA[Giailevra]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Belotti]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Negro]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Aspectos del manejo del cultivo de maíz de segunda y de la fertilización nitrogenada en la región pampeana norte de Argentina]]></article-title>
<source><![CDATA[Información Técnica Cultivos de Verano]]></source>
<year>2008</year>
<numero>112</numero>
<issue>112</issue>
<page-range>37-45</page-range></nlm-citation>
</ref>
<ref id="B53">
<label>53.</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Roque]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Heredia]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Del Franco]]></surname>
<given-names><![CDATA[ME]]></given-names>
</name>
<name>
<surname><![CDATA[Benedetto]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[Mastromauro]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Boveda]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Experiencias prácticas sobre manejo de riego por pulsos con enfoque en fertirriego]]></source>
<year>2017</year>
</nlm-citation>
</ref>
<ref id="B54">
<label>54.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Esteve]]></surname>
<given-names><![CDATA[GJ]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Apuntes sobre riego localizado]]></article-title>
<source><![CDATA[Servicio de Extensión Agraria]]></source>
<year>1986</year>
<numero>2</numero>
<issue>2</issue>
<page-range>29-37</page-range></nlm-citation>
</ref>
<ref id="B55">
<label>55.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wong]]></surname>
<given-names><![CDATA[JAC]]></given-names>
</name>
<name>
<surname><![CDATA[Sánchez]]></surname>
<given-names><![CDATA[DGR]]></given-names>
</name>
<name>
<surname><![CDATA[Ríos]]></surname>
<given-names><![CDATA[JLB]]></given-names>
</name>
<name>
<surname><![CDATA[Cervantes]]></surname>
<given-names><![CDATA[GG]]></given-names>
</name>
<name>
<surname><![CDATA[Sosa]]></surname>
<given-names><![CDATA[ES]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Rendimiento de maíz forrajero en respuesta a fertilización nitrogenada y densidad de población]]></article-title>
<source><![CDATA[Rev Fitotec Mex]]></source>
<year>2006</year>
<volume>29</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>97-101</page-range></nlm-citation>
</ref>
<ref id="B56">
<label>56.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Alvarez]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Steinbach]]></surname>
<given-names><![CDATA[HS]]></given-names>
</name>
<name>
<surname><![CDATA[Alvarez]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Grigera]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Recomendaciones para la fertilización nitrogenada de trigo y maíz en la pampa ondulada]]></article-title>
<source><![CDATA[Informaciones Agronómicas]]></source>
<year>2003</year>
<volume>18</volume>
<page-range>14-9</page-range></nlm-citation>
</ref>
<ref id="B57">
<label>57.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cabrera]]></surname>
<given-names><![CDATA[ML]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Mineralización y nitrificación: procesos claves en el ciclo del nitrógeno]]></article-title>
<source><![CDATA[Inf agron Cono Sur]]></source>
<year>2007</year>
<volume>34</volume>
<page-range>1-9</page-range></nlm-citation>
</ref>
<ref id="B58">
<label>58.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Perdomo]]></surname>
<given-names><![CDATA[CH]]></given-names>
</name>
<name>
<surname><![CDATA[Barbazán]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Durán Monzoni]]></surname>
<given-names><![CDATA[JM]]></given-names>
</name>
</person-group>
<source><![CDATA[Nitrógeno]]></source>
<year>2008</year>
<publisher-loc><![CDATA[Montevideo ]]></publisher-loc>
<publisher-name><![CDATA[Facultad de Agronomía]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B59">
<label>59.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Murungu]]></surname>
<given-names><![CDATA[FS]]></given-names>
</name>
<name>
<surname><![CDATA[Chiduza]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Muchaonyerwa]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Mnkeni]]></surname>
<given-names><![CDATA[PNS]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Decomposition, nitrogen and phosphorus mineralization from winter-grown cover crop residues and suitability for a smallholder farming system in South Africa]]></article-title>
<source><![CDATA[Nutr Cycling Agroecosyst]]></source>
<year>2011</year>
<volume>89</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>115-23</page-range></nlm-citation>
</ref>
<ref id="B60">
<label>60.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ceriani]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Innella]]></surname>
<given-names><![CDATA[JA]]></given-names>
</name>
</person-group>
<source><![CDATA[Efecto de la fertilización nitrogenada tardía (V10-11) sobre el rendimiento de maíz en condiciones de riego y secano]]></source>
<year>2012</year>
<publisher-loc><![CDATA[Montevideo (UY) ]]></publisher-loc>
<publisher-name><![CDATA[Universidad de la República, Facultad de Agronomía]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B61">
<label>61.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Abraham]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[Falco]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
</person-group>
<source><![CDATA[Efecto de la fertilización nitrogenada tardía (V10-12) sobre el rendimiento de maíz en condiciones de riego y secano]]></source>
<year>2016</year>
<publisher-loc><![CDATA[Montevideo (UY) ]]></publisher-loc>
<publisher-name><![CDATA[Universidad de la República, Facultad de Agronomía]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B62">
<label>62.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Blackmer]]></surname>
<given-names><![CDATA[AM]]></given-names>
</name>
<name>
<surname><![CDATA[Schepers]]></surname>
<given-names><![CDATA[JS]]></given-names>
</name>
<name>
<surname><![CDATA[Varvel]]></surname>
<given-names><![CDATA[GE]]></given-names>
</name>
<name>
<surname><![CDATA[Walter-Shea]]></surname>
<given-names><![CDATA[EA]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Nitrogen deficiency detection using reflected shortwave radiation from irrigated corn canopies]]></article-title>
<source><![CDATA[Agron J.]]></source>
<year>1996</year>
<volume>88</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>1-5</page-range></nlm-citation>
</ref>
<ref id="B63">
<label>63.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Farrell]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Gili]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Noellemeyer]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Spectral indices from aerial images and their relationship with properties of a corn crop]]></article-title>
<source><![CDATA[Precis Agric]]></source>
<year>2018</year>
<volume>19</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>1127-37</page-range></nlm-citation>
</ref>
<ref id="B64">
<label>64.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Maresma]]></surname>
<given-names><![CDATA[Á]]></given-names>
</name>
<name>
<surname><![CDATA[Ariza]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Martínez]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Lloveras]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Martínez-Casasnovas]]></surname>
<given-names><![CDATA[JA]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Analysis of vegetation indices to determine nitrogen application and yield prediction in maize (Zea mays L.) from a standard UAV service]]></article-title>
<source><![CDATA[Remote Sens]]></source>
<year>2016</year>
<volume>8</volume>
<numero>12</numero>
<issue>12</issue>
<page-range>973</page-range></nlm-citation>
</ref>
<ref id="B65">
<label>65.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Feng]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Xu]]></surname>
<given-names><![CDATA[W]]></given-names>
</name>
<name>
<surname><![CDATA[He]]></surname>
<given-names><![CDATA[Z]]></given-names>
</name>
<name>
<surname><![CDATA[Yang]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Advances in plant nutrition diagnosis based on remote sensing and computer application]]></article-title>
<source><![CDATA[Neural Comput Appl]]></source>
<year>2020</year>
<volume>32</volume>
<page-range>16833-42</page-range></nlm-citation>
</ref>
<ref id="B66">
<label>66.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Garcia Arnal Barbedo]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Detection of nutrition deficiencies in plants using proximal images and machine learning: a review]]></article-title>
<source><![CDATA[Comput Electron Agric]]></source>
<year>2019</year>
<volume>162</volume>
<page-range>482-92</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
