<?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>0187-5779</journal-id>
<journal-title><![CDATA[Terra Latinoamericana]]></journal-title>
<abbrev-journal-title><![CDATA[Terra Latinoam]]></abbrev-journal-title>
<issn>0187-5779</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de la Ciencia del Suelo A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0187-57792015000200161</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Comportamiento de la actividad enzimática del suelo al aplicar mucílago de nopal ( Opuntia spp.)]]></article-title>
<article-title xml:lang="en"><![CDATA[Behavior of soil enzyme activity to apply cactus mucilage ( Opuntia spp.)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Muñoz Bojorges]]></surname>
<given-names><![CDATA[Julio Cesar]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Quintero Lizaola]]></surname>
<given-names><![CDATA[Roberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pérez Nieto]]></surname>
<given-names><![CDATA[Joel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Valdés Velarde]]></surname>
<given-names><![CDATA[Eduardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García Favela]]></surname>
<given-names><![CDATA[Braulio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rojas Acosta]]></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  ]]></institution>
<addr-line><![CDATA[Chapingo Edo. De México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Colegio de Postgraduados Campus Montecillo ]]></institution>
<addr-line><![CDATA[Montecillo Edo. De México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Autónoma Chapingo Depto. De Fitotecnia ]]></institution>
<addr-line><![CDATA[Chapingo Edo. De México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Autónoma Chapingo Depto. De Preparatoria Agrícola ]]></institution>
<addr-line><![CDATA[Chapingo Edo. De México]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2015</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2015</year>
</pub-date>
<volume>33</volume>
<numero>2</numero>
<fpage>161</fpage>
<lpage>167</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-57792015000200161&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-57792015000200161&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-57792015000200161&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: El mucílago de nopal contiene polisacáridos que pueden influir en la actividad enzimática del suelo. Se emplearon dos suelos, arenoso (63%) y arcilloso (67%), donde se probaron tres dosis de mucílago de nopal; T80-20, T40-60, T10-90 (porcentaje de mucílago-agua), más el testigo solo con agua. Los tratamientos se colocaron en una cámara de ambiente controlado a 25 °C y humedad de 40%. Se tomaron muestras a los 7, 14 y 21 días, después de aplicado el mucílago. Se valoró la actividad de las enzimas: amilasa, celulasa, lipasa e invertasa, que participan en el ciclo del carbono para saber cómo afecta el mucílago de nopal en ellas. A los 21 días en el suelo arcilloso, con el tratamiento T80-20 hubo mayor actividad de: amilasa (91 mg de azúcares reductores 10 g-1 de materia seca 24 h-1), lipasa (133.33 nM de 4-metil umbeliferona g-1 de materia seca 24 h-1) e invertasa (5.53 mg de glucosa 10 g-1 de materia seca 24 h-1), y la celulasa en el T40-60 presentó la mayor actividad (72.66 &#956;g de glucosa g-1 de materia seca 24 h-1). En el suelo arenoso a los 21 días, el T80-20 fue el que presentó mayor actividad lipasa (60.66 nM de 4 metil umbeliferona g-1 de materia seca 24 h-1), el T40-60: invertasa (1.86 mg de glucosa 10 g-1 de materia seca 24 h-1) y celulasa (33.66 ug de glucosa g-1de materia seca 24 h-1), y el T10-90 amilasa (43.66 mg de azúcares reductores 10 g-1 de materia seca 24 h-1). El mucílago de nopal incrementó la actividad enzimática (amilasa, celulasa, lipasa e invertasa) en los dos tipos de suelo.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: The cactus mucilage contains polysaccharides that can influence the enzymatic activity of the soil. Two soils were used, sandy (63%) and clay (67%), three doses tested cactus mucilage; T80-20, T40-60, T10-90 (percentage of mucilage-water), plus control with only water. The treatments were placed in a controlled environment chamber at 25 °C and humidity of 40%, samples at 7, 14 and 21 days after application of the mucilage were taken. The enzyme activity was assessed; amylase, cellulase, lipase and invertase, involved in the carbon cycle to see the effect of mucilage in the activity of these enzymes. After 21 days in clay soil, T80-20 treatment had greater activity in the amylase enzyme (91 mg of reducing sugars 10 g-1 dry matter 24 h-1), lipase (133.33 nM 4-methyl umbelliferon g-1 dry matter 24 h-1) and invertase (5.53 mg glucose 10 g-1 dry matter 24 h-1) and T40-60 cellulase treatment had the highest activity (72.66 ug glucose mg-1 24 h-1 dry matter). In the sandy soil after 21 days treatment T80-20 was the largest for lipase enzyme (60.66 nM 4-methyl umbelliferone g-1 dry matter 24 h-1), the T40-60 for invertase enzyme (1.86 mg glucose10 g-1 dry matter 24 h-1) and cellulase (33.66 ug glucose g-1 24 h-1 dry matter) and T10-90 for amylase enzyme (43.66 mg of reducing sugars 10 g-1 of 24 h-1 dry matter).The cactus mucilage increased enzymatic activity (amylase, cellulase, lipase and invertase) in both soil types.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[amilasa]]></kwd>
<kwd lng="es"><![CDATA[celulasa]]></kwd>
<kwd lng="es"><![CDATA[lipasa]]></kwd>
<kwd lng="es"><![CDATA[invertasa]]></kwd>
<kwd lng="en"><![CDATA[amylase]]></kwd>
<kwd lng="en"><![CDATA[cellulase]]></kwd>
<kwd lng="en"><![CDATA[lipase]]></kwd>
<kwd lng="en"><![CDATA[invertase]]></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[Bakshi]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Varma]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Soil enzyme: The state-of-art]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Shukla]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Varma]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Soil enzymology]]></source>
<year>2011</year>
<page-range>1-23</page-range><publisher-loc><![CDATA[Berlin Heidelberg. Germany ]]></publisher-loc>
<publisher-name><![CDATA[Springer-Verlag]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Microbial responses to simulated tillage in cultivated and uncultivated soils]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Calderón]]></surname>
<given-names><![CDATA[J. F.]]></given-names>
</name>
<name>
<surname><![CDATA[Jackson]]></surname>
<given-names><![CDATA[L. E.]]></given-names>
</name>
<name>
<surname><![CDATA[Scow]]></surname>
<given-names><![CDATA[K. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Rolston]]></surname>
<given-names><![CDATA[D. E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Soil Biol. Biochem.]]></source>
<year>2000</year>
<volume>32</volume>
<page-range>1547-59</page-range></nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Rheology and aggregation of cactus (Opuntia ficus-indica) mucilage in solution]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cárdenas]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Higuera-Ciapara]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
<name>
<surname><![CDATA[Goycoolea]]></surname>
<given-names><![CDATA[F. M.]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Prof. Assoc. Cactus Develop.]]></source>
<year>1998</year>
<volume>2</volume>
<page-range>152-9</page-range></nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Organic matter influence on clay wettability and soil aggregate stability]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Chenu]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Bissonnais]]></surname>
<given-names><![CDATA[Y Le]]></given-names>
</name>
<name>
<surname><![CDATA[Arrouays]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
</person-group>
<source><![CDATA[Soil Sci. Soc. Am. J.]]></source>
<year>2000</year>
<volume>64</volume>
<page-range>1479-86</page-range></nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Soil physical quality part I. Theory effect of soil texture, density, and organic matter, and effect on root growth]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Dexter]]></surname>
<given-names><![CDATA[A. R.]]></given-names>
</name>
</person-group>
<source><![CDATA[Geoderma]]></source>
<year>2004</year>
<volume>120</volume>
<page-range>201-14</page-range></nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Soil acid and alkaline phosphatase activity as pH adjustment indicators]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Dick]]></surname>
<given-names><![CDATA[W. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Cheng]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Wang]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
</person-group>
<source><![CDATA[Soil Biol. Biochem.]]></source>
<year>2000</year>
<volume>32</volume>
<page-range>1915-9</page-range></nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Changes in soil microbial community structure with tillage under long-term wheat-fallow management]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Drijber]]></surname>
<given-names><![CDATA[R. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Doran]]></surname>
<given-names><![CDATA[J. W.]]></given-names>
</name>
<name>
<surname><![CDATA[Parkhurst]]></surname>
<given-names><![CDATA[A. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Lyon]]></surname>
<given-names><![CDATA[D. J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Soil Biol. Biochem.]]></source>
<year>2000</year>
<volume>32</volume>
<page-range>1419-30</page-range></nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Changes in physical properties and chemical composition of cactus pear (Opuntia ficus-indica) during maturation]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Duru]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Turker]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Prof. Assoc. Cactus Develop.]]></source>
<year>2005</year>
<volume>7</volume>
<page-range>22-33</page-range></nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Cactus extract increases water infiltration rates in two soils]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gardiner]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Felker]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Carr]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
</person-group>
<source><![CDATA[Comunn. Soil Sci. Plant Anal.]]></source>
<year>1999</year>
<volume>30</volume>
<page-range>1707-12</page-range></nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gianfreda]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Bollag]]></surname>
<given-names><![CDATA[J. M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Influence of natural and anthropogenic factors on enzyme activity in soil]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Stosky]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Bollag]]></surname>
<given-names><![CDATA[J. M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Soil biochemistry]]></source>
<year>1996</year>
<volume>9</volume>
<publisher-loc><![CDATA[New York, NY, USA ]]></publisher-loc>
<publisher-name><![CDATA[Marcel Dekker]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Modification of portland cement mortars with cactus gum]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hernández Z.]]></surname>
<given-names><![CDATA[J. B.]]></given-names>
</name>
<name>
<surname><![CDATA[Caballero B.]]></surname>
<given-names><![CDATA[C. E.]]></given-names>
</name>
<name>
<surname><![CDATA[Rosas J.]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[López L.]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[Hinojosa T.]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Castano]]></surname>
<given-names><![CDATA[V. M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Chem. Chem. Tecnol.]]></source>
<year>2007</year>
<volume>1</volume>
<page-range>175-7</page-range></nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Chemical characterization of the mucilage from fruits of Opuntia ficus indica]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Matsuhiro]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Lillo]]></surname>
<given-names><![CDATA[L. E.]]></given-names>
</name>
<name>
<surname><![CDATA[Sáenz]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Urzúa]]></surname>
<given-names><![CDATA[C. C.]]></given-names>
</name>
<name>
<surname><![CDATA[Zárate]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
</person-group>
<source><![CDATA[Carboh. Pol.]]></source>
<year>2006</year>
<volume>63</volume>
<page-range>263-7</page-range></nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Rheological properties of the mucilage gum (Opuntia ficus-indica)]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Medina Torres]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Brito de la Fuente]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Torrestiana S.]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Katthain]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<source><![CDATA[Food Hydrocol.]]></source>
<year>2000</year>
<volume>14</volume>
<page-range>417-24</page-range></nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Microbial diversity and soil functions]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Nannipieri]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Ascher]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Ceccherini]]></surname>
<given-names><![CDATA[M. T.]]></given-names>
</name>
<name>
<surname><![CDATA[Landi]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Pietramellara]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Renella]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<source><![CDATA[Eur. J. Soil Sci.]]></source>
<year>2003</year>
<volume>54</volume>
<page-range>655-70</page-range></nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Nannipieri]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Kandeler]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Ruggiero]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Enzyme activities and microbiological and biochemical processes in soil]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Burns]]></surname>
<given-names><![CDATA[R. G.]]></given-names>
</name>
<name>
<surname><![CDATA[Dick]]></surname>
<given-names><![CDATA[R. P.]]></given-names>
</name>
</person-group>
<source><![CDATA[Enzymes in the environment: Activity, ecology and applications]]></source>
<year>2002</year>
<page-range>1-33</page-range><publisher-loc><![CDATA[New York, NY, USA ]]></publisher-loc>
<publisher-name><![CDATA[Marcel Dekker]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Locus of urease activity in soil]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Paulson]]></surname>
<given-names><![CDATA[K. N.]]></given-names>
</name>
<name>
<surname><![CDATA[Kurtz]]></surname>
<given-names><![CDATA[L. T.]]></given-names>
</name>
</person-group>
<source><![CDATA[Soil Sci. Soc. Am. Proc.]]></source>
<year>1969</year>
<volume>33</volume>
<page-range>897-901</page-range></nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Quiquampoix]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Servagent-Noinville]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Baron]]></surname>
<given-names><![CDATA[M. H.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Enzyme adsorption on soil mineral surfaces and consequences for the catalytic activity]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Burns]]></surname>
<given-names><![CDATA[R. G.]]></given-names>
</name>
<name>
<surname><![CDATA[Dick]]></surname>
<given-names><![CDATA[R. P.]]></given-names>
</name>
</person-group>
<source><![CDATA[Enzymes in the environment: Activity ecology and applications]]></source>
<year>2002</year>
<page-range>285-306</page-range><publisher-loc><![CDATA[New York, NY, USA ]]></publisher-loc>
<publisher-name><![CDATA[Marcel-Dekker]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Some factors influencing the determination of phosphatase activity in native soils and soils sterilized by irradiation]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ramírez-Martínez]]></surname>
<given-names><![CDATA[J. R.]]></given-names>
</name>
<name>
<surname><![CDATA[McLaren]]></surname>
<given-names><![CDATA[A. D.]]></given-names>
</name>
</person-group>
<source><![CDATA[Enzymologia]]></source>
<year>1996</year>
<volume>31</volume>
<page-range>23-38</page-range></nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rebolledo R.]]></surname>
<given-names><![CDATA[H. H.]]></given-names>
</name>
</person-group>
<source><![CDATA[Manual SAS por computadora, análisis estadístico de datos expermentales]]></source>
<year>2002</year>
<publisher-loc><![CDATA[México, D. F. ]]></publisher-loc>
<publisher-name><![CDATA[Trillas]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[A survey of the activities of enzimes hidrolysing sucrose and starch in soils under pasture]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ross]]></surname>
<given-names><![CDATA[D. J.]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Soil. Sci.]]></source>
<year>1966</year>
<volume>17</volume>
<page-range>1-15</page-range></nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Cactus pear fruits and cladodes: A source of functional components for foods]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sáenz]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Acta Hortic.]]></source>
<year>2002</year>
<volume>581</volume>
<page-range>253-63</page-range></nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Opuntia spp. mucilage's: A functional component with industrial perspectives]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sáenz]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Sepulveda]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Matsuhiro]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Arid Environ.]]></source>
<year>2004</year>
<volume>57</volume>
<page-range>275-90</page-range></nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Xylanase, CM-celulase and invertase activity in soil: An improved method]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Schinner]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[Mersi]]></surname>
<given-names><![CDATA[W. von]]></given-names>
</name>
</person-group>
<source><![CDATA[Soil Biol. Biochem.]]></source>
<year>1990</year>
<volume>22</volume>
<page-range>511-5</page-range></nlm-citation>
</ref>
<ref id="B24">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Schinner]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[Óhlinger]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Kandeler]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Margesin]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<source><![CDATA[Bodenbiologische arbeitesmethoden]]></source>
<year>1991</year>
<publisher-loc><![CDATA[New York, NY, USA ]]></publisher-loc>
<publisher-name><![CDATA[Springer Verlag]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B25">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Extraction and characterization of mucilage in Opuntia spp]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sepúlveda]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Sáenz]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Aliaga]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Aceituno]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Arid Environ.]]></source>
<year>2007</year>
<volume>68</volume>
<page-range>534-45</page-range></nlm-citation>
</ref>
<ref id="B26">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[A greenhouse study on root dynamics of cactus pears, Opuntia ficus-indica and O. robusta]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Snyman]]></surname>
<given-names><![CDATA[H. A.]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Arid Environ.]]></source>
<year>2006</year>
<volume>65</volume>
<page-range>529-42</page-range></nlm-citation>
</ref>
<ref id="B27">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Light and electron microscopy of stained microaggregates: The role of organic matter and microbes in soil aggregation]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Tiessen]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Stewart]]></surname>
<given-names><![CDATA[and J. W. B.]]></given-names>
</name>
</person-group>
<source><![CDATA[Biogeochemistry]]></source>
<year>1988</year>
<volume>5</volume>
<page-range>312-22</page-range></nlm-citation>
</ref>
<ref id="B28">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Decomposition of carbon-14-labeled proteins, peptides, and amino acids, free and complexed with humic polymers]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Verma]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Martin]]></surname>
<given-names><![CDATA[J. P.]]></given-names>
</name>
<name>
<surname><![CDATA[Haider]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
</person-group>
<source><![CDATA[Soil. Sci. Soc. Am. Proc.]]></source>
<year>1975</year>
<volume>39</volume>
<page-range>279-84</page-range></nlm-citation>
</ref>
<ref id="B29">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Zimmerman]]></surname>
<given-names><![CDATA[A. R.]]></given-names>
</name>
<name>
<surname><![CDATA[Ahn]]></surname>
<given-names><![CDATA[M. Y.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Organo-mineral-enzyme interaction and soil enzyme activity]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Shukla]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Varma]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Soil enzymology]]></source>
<year>2011</year>
<page-range>271-88</page-range><publisher-loc><![CDATA[Berlin Heidelberg. Germany ]]></publisher-loc>
<publisher-name><![CDATA[Springer-Verlag]]></publisher-name>
</nlm-citation>
</ref>
</ref-list>
</back>
</article>
