<?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>2007-0934</journal-id>
<journal-title><![CDATA[Revista mexicana de ciencias agrícolas]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Mex. Cienc. Agríc]]></abbrev-journal-title>
<issn>2007-0934</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-09342016001203263</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Indicadores de calidad de un suelo para la producción de maíz bajo sistemas agroforestal y monocultivo]]></article-title>
<article-title xml:lang="en"><![CDATA[Indicators of soil quality for maize production under agroforestry systems and monoculture]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez Serrano]]></surname>
<given-names><![CDATA[Andrés Camilo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cristóbal Acevedo]]></surname>
<given-names><![CDATA[David]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Álvarez Sánchez]]></surname>
<given-names><![CDATA[Edna]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Uribe Gómez]]></surname>
<given-names><![CDATA[Miguel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma Chapingo Posgrado en Ciencias Agroforestería para el Desarrollo Sostenible ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2016</year>
</pub-date>
<volume>7</volume>
<numero>spe16</numero>
<fpage>3263</fpage>
<lpage>3275</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-09342016001203263&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-09342016001203263&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-09342016001203263&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen En una plantación de olivo, ubicada en el municipio de Texcoco, Estado de México, bajo la cual se siembra maíz desde hace 30 años, se evaluó la influencia de los árboles sobre los indicadores físicos, químicos y biológicos de calidad de suelo. Se establecieron dos tratamientos: sistema agroforestal (SAF) y monocultivo (MC), cada uno con tres repeticiones; se realizaron mediciones de: 1) propiedades físicas; 2) propiedades químicas; 3) propiedades biológicas; 4) escurrimiento, pérdida de suelo; y 5) producción de maíz. El sistema agroforestal presentó menores porcentajes de capacidad de campo y punto de marchitez permanente, favoreció mejores condiciones para el desarrollo de la actividad microbiana y la presencia de mesofauna, redujo valores de escurrimiento y pérdida de suelo, y no presentó diferencias significativas en cuanto a las propiedades químicas; evidenciando una mayor conservación del suelo. No obstante, este aparente beneficio ecológico no se vio reflejado sobre la producción de maíz, que fue de 4 670 kg ha-1, en el SAF, y de 6 379 kg ha-1 en el MC, probablemente por el efecto negativo de la sombra de los árboles sobre el cultivo de maíz.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract In an olive plantation, located in the municipality of Texcoco, Estado de Mexico, under which corn is planted for 30 years, the influence of trees on the physical, chemical and biological indicators of soil quality was evaluated. The treatments were: agroforestry system (SAF) and monoculture (MC), each with three repetitions; measurements were performed: 1) physical properties; 2) chemical properties; 3) biological properties; 4) runoff, soil loss; and 5) corn production. The agroforestry system had lower percentages of field capacity and wilting point, favored better conditions for the development of microbial activity and the presence of mesofauna, reduced values of runoff and soil loss, and no significant differences in the chemical properties; showing greater soil conservation. However, this apparent environmental benefit was not reflected on the production of corn, which was 4 670 kg ha-1, in SAF, and 6 379 kg ha-1 in the MC, probably by the negative effect of shade of trees on the cultivation of corn.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[agroforestería]]></kwd>
<kwd lng="es"><![CDATA[conservación de suelo]]></kwd>
<kwd lng="es"><![CDATA[escurrimiento]]></kwd>
<kwd lng="es"><![CDATA[fertilidad]]></kwd>
<kwd lng="en"><![CDATA[agroforestry]]></kwd>
<kwd lng="en"><![CDATA[drainage]]></kwd>
<kwd lng="en"><![CDATA[fertility]]></kwd>
<kwd lng="en"><![CDATA[soil conservation]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Anderson]]></surname>
<given-names><![CDATA[J. P. E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Soil respiration]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Miller]]></surname>
<given-names><![CDATA[A. L.]]></given-names>
</name>
<name>
<surname><![CDATA[Keeney]]></surname>
<given-names><![CDATA[R. H.]]></given-names>
</name>
</person-group>
<source><![CDATA[Methods of soil analysis. Part 2: chemical and microbiological properties]]></source>
<year>1982</year>
<page-range>837-71</page-range><publisher-loc><![CDATA[Madison, Wisconsin, USA ]]></publisher-loc>
<publisher-name><![CDATA[Society of Agronomy and Soil Science Society of America]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ávila]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Harmand]]></surname>
<given-names><![CDATA[J. H.]]></given-names>
</name>
<name>
<surname><![CDATA[Dambrine]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Jiménez]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[Beer]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Oliver]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Dinámica del nitrógeno en el sistema agroforestal Coffea arabica con Eucalyptus def lupta en la zona sur de Costa Rica]]></article-title>
<source><![CDATA[Agroforestería en las Amércias]]></source>
<year></year>
<volume>41</volume>
<numero>42</numero>
<issue>42</issue>
<page-range>83-91</page-range></nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Barreto]]></surname>
<given-names><![CDATA[C. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Soriano]]></surname>
<given-names><![CDATA[F. H.]]></given-names>
</name>
<name>
<surname><![CDATA[Galvão dos Santos]]></surname>
<given-names><![CDATA[M. B.]]></given-names>
</name>
<name>
<surname><![CDATA[Reis de Araujo]]></surname>
<given-names><![CDATA[Q.]]></given-names>
</name>
<name>
<surname><![CDATA[Freire]]></surname>
<given-names><![CDATA[F. J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Características químicas e físicas de um solo sob floresta]]></article-title>
<source><![CDATA[sistema agroflorestal e pastagem no sul da Bahia]]></source>
<year>2006</year>
<volume>19</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>415-25</page-range></nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Betalot]]></surname>
<given-names><![CDATA[M. J. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Guerrini]]></surname>
<given-names><![CDATA[I. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Mendoza]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Pinto]]></surname>
<given-names><![CDATA[M. S. V.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Productivity, leaf nutrient content and soil carbon stocked in agroforestry and traditional management of maize (Zea mays L.)]]></article-title>
<source><![CDATA[Am. J. Plant Sci.]]></source>
<year>2014</year>
<volume>5</volume>
<page-range>884-98</page-range></nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cruz]]></surname>
<given-names><![CDATA[J. C.]]></given-names>
</name>
<name>
<surname><![CDATA[Pereira]]></surname>
<given-names><![CDATA[I. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Costa]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Gontijo]]></surname>
<given-names><![CDATA[M. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Herbert]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Fernández]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Santana]]></surname>
<given-names><![CDATA[D. P.]]></given-names>
</name>
</person-group>
<source><![CDATA[Manejo da cultura do Milho. EMBRAPA]]></source>
<year>2006</year>
<page-range>12</page-range><publisher-loc><![CDATA[MG ]]></publisher-loc>
<publisher-name><![CDATA[Sete Lagoas]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[De la Rosa]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
</person-group>
<source><![CDATA[Evaluación agro-ecológica de suelos para un desarrollo sostenible]]></source>
<year>2008</year>
<numero>87</numero>
<issue>87</issue>
<page-range>404</page-range><publisher-loc><![CDATA[Madrid, España ]]></publisher-loc>
<publisher-name><![CDATA[Mundi prensa]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Eswaran]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Lal]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Reich]]></surname>
<given-names><![CDATA[P. F.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Land degradation: an overview]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Bridges]]></surname>
<given-names><![CDATA[E. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Hannam]]></surname>
<given-names><![CDATA[I. D.]]></given-names>
</name>
<name>
<surname><![CDATA[Oldeman]]></surname>
<given-names><![CDATA[L. R.]]></given-names>
</name>
<name>
<surname><![CDATA[Pening de Vries]]></surname>
<given-names><![CDATA[F. W. T.]]></given-names>
</name>
<name>
<surname><![CDATA[Scherr]]></surname>
<given-names><![CDATA[S. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Sompatpanit]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<source><![CDATA[Responses to land degradation. Proc. 2nd. International Conference on Land Degradation and Desertification]]></source>
<year>2001</year>
<page-range>254</page-range><publisher-loc><![CDATA[Thailand. Oxford Press, New Delhi, India ]]></publisher-loc>
<publisher-name><![CDATA[Khon Kaen]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Karyanto]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Rahmadi]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Franklin]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Susilo]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[Morais. J.]]></surname>
<given-names><![CDATA[de]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Collembola, Acari y otra mesofauna del suelo: el método Berlese]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Moreira]]></surname>
<given-names><![CDATA[F. M. S.]]></given-names>
</name>
<name>
<surname><![CDATA[Huising]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Bignell]]></surname>
<given-names><![CDATA[D. E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Manual de biología de suelos tropicales, muestreo y caracterización de la biodiversidad bajo suelo]]></source>
<year>2012</year>
<page-range>337</page-range><publisher-loc><![CDATA[México ]]></publisher-loc>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México (UNAM)- Instituto Nacional de Ecología (INE)]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Krishnamurthy]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Ávila]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Agroforestería básica. PNUMA. Oficina regional paraAmérica Latina y el Caribe]]></source>
<year>1999</year>
<numero>3</numero>
<issue>3</issue>
<page-range>340</page-range><publisher-loc><![CDATA[México, D. F. ]]></publisher-loc>
<publisher-name><![CDATA[Serie de textos básicos para la FormaciónAmbiental]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Macedo]]></surname>
<given-names><![CDATA[R. L. G.]]></given-names>
</name>
<name>
<surname><![CDATA[Gomez]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Venturin]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Silva]]></surname>
<given-names><![CDATA[doVale R.]]></given-names>
</name>
<name>
<surname><![CDATA[de Oliveira]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
</person-group>
<source><![CDATA[Revista Árvore Viçosa]]></source>
<year>2006</year>
<volume>30</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>701-9</page-range></nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mahecha]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[El silvopastoreo: una alternativa de producción que disminuye el impacto ambiental de la ganadería bovina]]></article-title>
<source><![CDATA[Rev. Colomb. Cienc. Pec.]]></source>
<year>2002</year>
<volume>15</volume>
<page-range>226-31</page-range></nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Matoso]]></surname>
<given-names><![CDATA[C. P.]]></given-names>
</name>
<name>
<surname><![CDATA[Silva]]></surname>
<given-names><![CDATA[R. H.]]></given-names>
</name>
<name>
<surname><![CDATA[de Freitas]]></surname>
<given-names><![CDATA[G. B.]]></given-names>
</name>
<name>
<surname><![CDATA[Prieto]]></surname>
<given-names><![CDATA[H. E.]]></given-names>
</name>
<name>
<surname><![CDATA[Jaramillo]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Lages]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Análise comparativa das características da serrapilheira e do solo em cafezais (Coffea arabica) cultivados em sistema agroflorestal e em monocultura, na zona da mata MG]]></article-title>
<source><![CDATA[Rev. Árvore]]></source>
<year></year>
<volume>31</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>805-12</page-range></nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Melloni]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Guimarães]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Nogueira]]></surname>
<given-names><![CDATA[M. I.]]></given-names>
</name>
<name>
<surname><![CDATA[Marcondes]]></surname>
<given-names><![CDATA[F. B.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Avaliação da qualidade de solos sob diferentes coberturas florestais e de pastagem no sul de Minas Gerais]]></article-title>
<source><![CDATA[R. Bras. Ci. Solo]]></source>
<year>2008</year>
<volume>32</volume>
<page-range>2461-70</page-range></nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Moreno]]></surname>
<given-names><![CDATA[S. E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Características territoriales, ambientales y sociopolíticas del municipio de Texcoco, Estado de México]]></article-title>
<source><![CDATA[Quivera]]></source>
<year>2007</year>
<volume>9</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>177-206</page-range></nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Nair]]></surname>
<given-names><![CDATA[P. K. R]]></given-names>
</name>
</person-group>
<source><![CDATA[An introduction to agroforestry]]></source>
<year>1993</year>
<page-range>499</page-range><publisher-loc><![CDATA[Dordrecht, The Netherlands ]]></publisher-loc>
<publisher-name><![CDATA[Kluwer Academic]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pinese]]></surname>
<given-names><![CDATA[J. F.]]></given-names>
</name>
<name>
<surname><![CDATA[Moreira]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Rodrigues]]></surname>
<given-names><![CDATA[S. C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Monitoramento de erosão laminar em diferentes usos da terra]]></article-title>
<source><![CDATA[Uberlândia, -M. G. Sociedade &amp; Natureza, Uberlândia]]></source>
<year>2008</year>
<volume>20</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>157-75</page-range></nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="">
<collab>SEMARNAT</collab>
<source><![CDATA[Norma oficial mexicana NOM-021-RECNAT-2000]]></source>
<year>2000</year>
<publisher-loc><![CDATA[México D. F. ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="book">
<collab>SEMARNAT-CP</collab>
<source><![CDATA[Evaluación de la degradación del suelo causada por el hombre en la República Mexicana, escala 1:250 000]]></source>
<year>2003</year>
<publisher-loc><![CDATA[México ]]></publisher-loc>
<publisher-name><![CDATA[Memoria Nacional 2001-2002]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Singer]]></surname>
<given-names><![CDATA[M. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Ewing]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Soil quality]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Sumner]]></surname>
<given-names><![CDATA[M. E.]]></given-names>
</name>
</person-group>
<source><![CDATA[handbook of soil science. Chapter 11]]></source>
<year>2000</year>
<page-range>387</page-range><publisher-loc><![CDATA[Boca Raton, Florida ]]></publisher-loc>
<publisher-name><![CDATA[CRC Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Shaxson]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[Barber]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<source><![CDATA[Optimización de la humedad del suelo para la producción vegetal, el significado de la porosidad del suelo]]></source>
<year>2005</year>
<page-range>105</page-range><publisher-loc><![CDATA[Roma, Italia ]]></publisher-loc>
<publisher-name><![CDATA[FAO]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Unger]]></surname>
<given-names><![CDATA[P. W.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Common soil and water conservation practices]]></article-title>
<source><![CDATA[soil erosion, conservation, and rehabilitation]]></source>
<year>1996</year>
<page-range>402</page-range><publisher-loc><![CDATA[New York ]]></publisher-loc>
<publisher-name><![CDATA[Marcel Dekker]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="">
<collab>UNCCD</collab>
<source><![CDATA[Desertification, particularly in Africa]]></source>
<year>1996</year>
</nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="book">
<collab>UNCCD</collab>
<source><![CDATA[Benefits of sustainable land management. 16 p. USDA. 1999. Soli taxonomy. A basic system of soil classification for making and interpreting soil surveys]]></source>
<year>2009</year>
<numero>436</numero>
<issue>436</issue>
<page-range>870</page-range><publisher-name><![CDATA[Agriculture handbook]]></publisher-name>
</nlm-citation>
</ref>
</ref-list>
</back>
</article>
