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95 resultados encontrados para: TEMA: Contaminación de suelos
11.
Libro
Descubre la ciencia: antología 3 / selección de textos Gerardo González Núñez ; dirección editorial Tomás García Cerezo
González Núñez, Gerardo ; García Cerezo, Tomás (ed.) ;
Ciudad de México, México : Grupo Editorial Patria , c2017
Clasificación: 303.483 / P5/3
Cerrar
SIBE Campeche
ECO040006860 (Disponible) , ECO040006859 (Disponible)
Disponibles para prestamo: 2
Cerrar
SIBE San Cristóbal
ECO010019408 (Disponible) , ECO010019407 (Disponible)
Disponibles para prestamo: 2
Cerrar
SIBE Tapachula
ECO020013692 (Disponible) , ECO020013693 (Disponible)
Disponibles para prestamo: 2
Cerrar
SIBE Villahermosa
ECO050006341 (Disponible) , ECO050006340 (Disponible)
Disponibles para prestamo: 2
Índice | Resumen en: Español |
Resumen en español

La divulgación científica pretende hacer accesible el conocimiento generado por la ciencia. Su función no es traducirlo, como si se tratara de otro idioma, sino transformarlo para tender un puente entre la ciencia y el ciudadano común; busca la universalización del conocimiento generado por los científicos para explicar de forma sencilla, al público no especializado, fenómenos asombrosos o procesos impresionantes que ocurren a nuestro alrededor. En Descubre la ciencia. Antología 3, el lector encontrará artículos de gran interés pertenecientes a la biología, la física, la química y la tecnología, entre otras disciplinas: Aguas profundas: crónica de un desastre anunciado. Fertilizantes: ¿orgánicos o industriales?. Jugo de Sol: combustible a partir de fotosíntesis artificial. Los productos "milagro": ni placebo ni panacea, sólo fraude. Mensajes a las estrellas. Robots blandos. Microplásticos, insospechado problema ambiental. Animación digital y realidad virtual. Reportero robot, la nueva era del periodismo

Índice

Presentación
Aguas profundas: crónica de un desastre anunciado
Fertilizantes: ¿orgánicos o industriales?
Jugo de Sol: combustible a partir de fotosíntesis artificial
Los productos “milagro”: ni placebo ni panacea, sólo fraude
Mensajes a las estrellas
Robots blandos
Microplásticos, insospechado problema ambiental
Animación digital y realidad virtual
Reportero robot, la nueva era del periodismo
Créditos completos de los artículos
Créditos iconográficos


12.
Artículo
*Solicítelo con su bibliotecario/a
Evaluation of enzyme activities in long-term polluted soils with mine tailing deposits of San Luis Potosí, México
Martínez Toledo, Ángeles (coaut.) ; Montes Rocha, Ángel (coaut.) ; González Mille, Donaji Josefina (coaut.) ; Espinosa Reyes, Guillermo ; Torres Dosal, Arturo ; Mejia Saavedra, Jesús J. (coaut.) ; Ilizaliturri Hernández, César Arturo (coaut.) ;
Contenido en: Journal of Soils and Sediments Vol. 17, no. 2 (February 2017), p. 364-375 ISSN: 1439-0108
Nota: Solicítelo con su bibliotecario/a
Resumen en: Inglés |
Resumen en inglés

Purpose San Luis Potosí is one of the largest metal producers; mining activity has been responsible for metal emissions for over 100 years, from several sources (deposits, tailings, effluents, and dusts) generating effects in human and ecosystem health. The objective of this study was to evaluate the effect of the concentrations of heavy metals in the soil health of four municipalities of San Luis Potosí contaminated with mine tailings, using enzyme activity as a biochemical endpoint. Materials and methods Four municipalities contaminated with residues of historical mining activity were analyzed (25 topsoil samples per type of site contaminated and reference). The parameters that were analyzed included pH; organic matter (OM); electrical conductivity (EC); percentage of clay, As, Cd, Cr, Cu, Hg, Pb, and Zn; and arylsulfatase (ARS), β-glucosidase (BG), urease (UR), and fluorescein diacetate hydrolysis (FDA) activities in soil. Differences among the parameters per municipality and type of site were evaluated using a factorial analysis of variance. The relationships were analyzed by Pearson’s correlation and a stepwise distance-based linear model permutation test (DistLM). Results were visualized using a distance-based redundancy analysis (dbRDA). A hazard quotient (HQ) for metals was calculated in order to estimate the effects on soil microbial processes.

Results and discussion A concentration gradient (mg/kg) of Zn (4744.5–65,585.7), Pb (1321.0–31,932.2), As (ND-8736.7), and Cu (130.9–8475.4) was found in the contaminated sites. The HQ showed a very high hazard level for the elements detected in all contaminated sites (1.4–655.8). The pattern of enzymatic inhibition found was ARS (95.8 %), UR (90.6 %), FDA (86.9 %), and BG (76.0 %). Strong negative relationships were observed among enzymatic activities and heavy metals in the following inhibitory effect Cu > As > Zn > Pb. Metals and covariables explained from 84 to 86 % of variability in enzyme activity. EC, Cu, and As showed a strong inhibitory effect; and parameters such as OM, pH, and clay were found to have a slightly inducing effect. Conclusions In this study, the heavy metal concentrations were higher than the ones obtained in other reports for this region. The HQ reveals the presence of possible risks for the health of life in the region. The decrease of enzyme activities in soil could trigger adverse changes in the flow of matter and energy in ecosystems. This study provides a field baseline that could be part of a long-term monitoring program for these locations.


13.
- Artículo con arbitraje
*Solicítelo con su bibliotecario/a
Growth of four tropical tree species in petroleum-contaminated soil and effects of crude oil contamination
Pérez Hernández, Isidro ; Ochoa Gaona, Susana (coaut.) ; Adams, R.H. (coaut.) ; Rivera Cruz, María del Carmen (coaut.) ; Pérez Hernández, V. (coaut.) ; Jarquín Sánchez, Aarón (coaut.) ; Geissen Geissen, Violette (coaut.) ; Martínez Zurimendi, Pablo (coaut.) ;
Contenido en: Environmental Science and Pollution Research Vol. 24, no. 2 (January 2017), p. 1769–1783 ISSN: 1614-7499
Nota: Solicítelo con su bibliotecario/a
Resumen en: Inglés |
Resumen en inglés

Under greenhouse conditions, we evaluated establishment of four tree species and their capacity to degrade crude oil recently incorporated into the soil; the species were as follows: Cedrela odorata (tropical cedar), Haematoxylum campechianum (tinto bush), Swietenia macrophylla (mahogany), and Tabebuia rosea (macuilis). Three-month-old plants were planted in soil with three treatments of heavy petroleum and a control (C0 0 mg kg−¹; C1 18,000 mg kg−¹; C2 31,700 mg kg−¹; C3 47,100 mg kg−¹) with four repetitions per treatment and species; the experiment was carried out for 245 days. Height and biomass of all species significantly diminished as petroleum concentration increased, although plant survival was not affected. The quantity of colonyforming units (CFU) of rhizospheric bacteria varied among tree species and treatments; petroleum stimulated bacterial CFU for S. macrophylla. The number of fungi CFU for S. macrophylla and T. rosea was significantly greater in C0 than in soil with petroleum, but among species and among different concentrations, no significant differences were found. The greatest percentage of total petroleumhydrocarbon (TPH) degradation was found in C1 for soil without plants (45 %). Differences from the remaining treatments (petroleum concentrations in soil and plant species) were not significant (P < 0.05). Among all trees, H. campechianum had the greatest TPH degradation (32.5 % in C2). T. rosea (C1) and H. campechianum (C2) resulted in petroleum degradation at levels ranging from 20.5 to 32.5 %. On the basis of this experiment, the tree species used did not improve TPH degradation. However, all of them showed high rates of survival and vigor. So, as tree species provide goods and services, experiments with inoculation of hydrocarbonclastic microorganisms, addition of fertilizers, and mixture of tree and grasses are recommended.


14.
- Artículo con arbitraje
*Solicítelo con su bibliotecario/a
Incorporation of microplastics from litter into burrows of Lumbricus terrestris
Huerta Lwanga, Esperanza (coaut.) ; Gertsen, Hennie (coaut.) ; Gooren, Harm (coaut.) ; Peters, Piet (coaut.) ; Salánki, Tamás (coaut.) ; van der Ploeg, Martine (coaut.) ; Besseling, Ellen (coaut.) ; Koelmans, Albert A. (coaut.) ; Geissen Geissen, Violette (coaut.) ;
Contenido en: Environmental Pollution Vol. 220, part A (January 2017), p. 523–531 ISSN: 0269-7491
Nota: Solicítelo con su bibliotecario/a
Resumen en: Inglés |
Resumen en inglés

Pollution caused by plastic debris is an urgent environmental problem. Here, we assessed the effects of microplastics in the soil surface litter on the formation and characterization of burrows built by the anecic earthworm Lumbricus terrestris in soil and quantified the amount of microplastics that was transported and deposited in L. terrestris burrows. Worms were exposed to soil surface litter treatments containing microplastics (Low Density Polyethylene) for 2 weeks at concentrations of 0%, 7%, 28%, 45% and 60%. The latter representing environmentally realistic concentrations found in hot spot soil locations. There were significantly more burrows found when soil was exposed to the surface treatment composed of 7% microplastics than in all other treatments. The highest amount of organic matter in the walls of the burrows was observed after using the treatments containing 28 and 45% microplastics.

The highest microplastic bioturbation efficiency ratio (total microplastics (mg) in burrow walls/initial total surface litter microplastics (mg)) was found using the concentration of 7% microplastics, where L. terrestris introduced 73.5% of the surface microplastics into the burrow walls. The highest burrow wall microplastic content per unit weight of soil (11.8 ± 4.8 g kg-¹) was found using a concentration of 60% microplastics. L. terrestris was responsible for size-selective downward transport when exposed to concentrations of 7, 28 and 45% microplastics in the surface litter, as the fraction ≤50 μm microplastics in burrow walls increased by 65% compared to this fraction in the original surface litter plastic. We conclude that the high biogenic incorporation rate of the small-fraction microplastics from surface litter into burrow walls causes a risk of leaching through preferential flow into groundwater bodies. Furthermore, this leaching may have implications for the subsequent availability of microplastics to terrestrial organisms or for the transport of plastic-associated organic contaminants in soil.


15.
- Artículo con arbitraje
Metales pesados en suelos y sedimentos de la zona cañera del sur de Quintana Roo, México
Tun Canto, Gibrán Eduardo ; Álvarez Legorreta, Teresa ; Zapata Buenfil, Gonzalo ; Sosa Cordero, Eloy ;
Contenido en: Revista Mexicana de Ciencias Geológicas Vol. 34, no. 3 (2017), p. 157-169 ISSN: 2007-2902
PDF
Resumen en: Español | Inglés |
Resumen en español

Con el objetivo de determinar la presencia y distribución de los metales pesados en la zona cañera de la cuenca del Río Hondo, sur de Quintana Roo, México, se colectaron 10 muestras de sedimentos superficiales del canal de desagüe principal y 18 muestras de suelos superficiales desarrollados sobre un acuífero kárstico en las parcelas aledañas al canal. Las muestras de ambas matrices ambientales fueron tomadas en febrero de 2016, durante la temporada de secas. Se determinaron las concentraciones totales de Hg, Cd, Cu y Fe, y valores fisicoquímicos como el pH, materia orgánica y la capacidad de intercambio catiónico de los suelos. Para comprender la distribución de los metales pesados se obtuvieron parámetros estadísticos descriptivos; además, se hicieron correlaciones de Pearson, análisis de varianza, pruebas t de Student, análisis de componentes principales y de dendrogramas. Las concentraciones promedio de metales pesados encontradas en suelo y sedimentos en orden descendente fueron: Fe > Cu > Cd > Hg con valores en suelo de 25,334.13 mg∙kg-¹, 10.56 mg∙kg-¹, 0.55 mg∙kg-¹ y 0.02 mg∙kg-¹, respectivamente; y para sedimento los valores obtenidos fueron 19,952.68 mg∙kg-¹, 8.00 mg∙kg-¹, 0.54 mg∙kg-¹ y 0.06 mg∙kg-¹, respectivamente. Los valores de los parámetros fisicoquímicos (pH, materia orgánica y capacidad de intercambio catiónico) resultaron homogéneos dentro del área de estudio.

Las concentraciones detectadas de Hg, Cd y Cu podrían provenir de fuentes antropogénicas. Se determinó que el Fe se encuentra de manera natural en el área analizada y su distribución posiblemente ha sido afectada por la actividad agrícola. El factor que determina la distribución de los metales pesados en los suelos agrícolas de la zona cañera es el arrastre de partículas de suelo causado por los escurrimientos, y el mayor aporte de estos contaminantes al drenaje agrícola ocurre principalmente por el arrastre de partículas provenientes de suelos de tipo gleysol.

Resumen en inglés

In order to determine the heavy metals content and distribution in an area cultivated with sugarcane in the Río Hondo basin, southern Quintana Roo, Mexico, 10 samples of surficial sediments were collected from the main agricultural drain and 18 samples from soils developed on a karst aquifer. The samples were obtained on february 2016, during the dry season. Concentrations of Hg, Cd, Cu, and Fe and physicochemical parameters such pH, organic matter and cation exchange capacity were measured. In order to understand the distribution of the heavy metals, we performed descriptive statistics, Pearson correlation, analysis of variance, t test, principal component analysis and hierarchical clustering analysis. The mean concentration of heavy metals in soil, in descending order were: Fe > Cu > Cd > Hg with soil values of 25,334.13 mg·kg-¹, 10.56 mg·kg-¹, 0.55 mg·kg-¹ and 0.02 mg·kg-¹, respectively; the sediment values found were 19,952.68 mg·kg-¹, 8.00 mg·kg-¹, 0.54 mg·kg-¹ and 0.06 mg·kg-¹, respectively. The physical and chemical parameters were homogeneous within the study area. The origin of Hg, Cd and Cu concentrations could be anthropogenic. Although Fe is naturally found in the study area, it is possible that the current distribution of this metal is also due to agricultural activity. The main factor in the distribution of heavy metals in the agricultural soils of the sugarcane zone is the carrying of soil particulates caused by runoff, and the greater contribution of these pollutants to the agricultural drain occurs mainly by the entrainment of particulates from gleysol type soils.


16.
Artículo
PDF
Resumen en: Inglés |
Resumen en inglés

Background Rural communities in the Amazonian southern border of Ecuador have benefited from governmental social programmes over the past 9 years, which have addressed, among other things, diseases associated with poverty, such as soil transmitted helminth infections. The aim of this study was to explore the prevalence of geohelminth infection and several factors associated with it in these communities. Methods This was a cross sectional study in two indigenous communities of the Amazonian southern border of Ecuador. The data were analysed at both the household and individual levels. Results At the individual level, the prevalence of geohelminth infection reached 46.9% (95% CI 39.5% to 54.2%), with no differences in terms of gender, age, temporary migration movements or previous chemoprophylaxis. In 72.9% of households, one or more members were infected. Receiving subsidies and overcrowding were associated with the presence of helminths. Conclusions The prevalence of geohelminth infection was high. Our study suggests that it is necessary to conduct studies focusing on communities, and not simply on captive groups, such as schoolchildren, with the object of proposing more suitable and effective strategies to control this problem.


17.
- Artículo con arbitraje
*Solicítelo con su bibliotecario/a
2,4-D mobility in clay soils: impact of macrofauna abundance on soil porosity
Prado, P. (autor/a) ; Gastelum Strozzi, A. (autor/a) ; Huerta Lwanga, Esperanza (autora) ; Duwig, C. (autor/a) ; Zamora, O. (autor/a) ; Delmas, P. (autor/a) ; Casasola, D. (autor/a) ; Márquez, J. (autor/a) ;
Disponible en línea
Contenido en: Geoderma Vol. 279 (October 2016), p. 87–96 ISSN: 0016-7061
Nota: Solicítelo con su bibliotecario/a
Resumen en: Inglés |
Resumen en inglés

Pesticides in agriculture are commonly used to meet the growing food demand; however they compromise the quality of water and soil. The pesticide 2,4-D is one of the most widely used herbicides in the world, it belongs to the group of synthetic herbicides that control broadleafweeds. In this paper the risk of groundwater contamination by 24-D and its major metabolite, 2,4-DCP, is studied in a context of high density of soil worms. We compared the adsorption, desorption, degradation and displacement of 2,4-D in soils from Tabasco Region having different properties: clay, organic matter, iron and aluminum oxides contents. In addition to the classical soil physicochemical characterizations, a 3D analysis of the soil structure and porosity was performed by analyzing images acquired by Computed Tomography. The objective was to evaluate the effect of soil properties and macroporosity produced by the macrofauna activity on solute movement. All the four soils studied sorbed the herbicides, more importantly 2,4-DCP, the metabolite, than 2,4-D itself. The distribution coefficients for 2,4-D sorption were linear and varied between 1 and 4 while those for 2,4-DCP were above 10. The contents of iron and aluminumhave an important role in the adsorption of these two compounds. In aerobic conditions, the herbicides half-life was about 2 days. Water movement occurred in physical equilibriumin three of the four soils; soil dispersivity ranged from1.2 to 7 cm, clay content being the main factor. After 20 to 60 days depending on the soil, no 2,4-D leaching was observed through the soil columns, except for one soil were there was preferential flow.

Earthworms burrows were exhibited and quantified in the soils samples through the analysis of Computer Tomography (CT) images, they appeared as small, snail-shaped, rounded volume of 3 to 7mmradiuswith a higher density with respect to the surrounding soil. Theywere extracted fromthe original data using a combination of image processing and mathematical morphology operators. Based on the results obtained, it can be concluded that preferential flow caused by both high clay content and the presence of macrofauna pores significantly reduces the buffering capacity of the soil, increasing the risk of contamination by herbicides of the underlying aquifer.


18.
Tesis - Maestría
Metales pesados en suelos y sedimentos de la zona cañera del sur de Quintana Roo, México / Gibran Eduardo Tun Canto
Tun Canto, Gibrán Eduardo (autor) ; Álvarez Legorreta, Teresa (directora) ; Zapata Buenfil, Gonzalo de Jesús (asesor) ; Sosa Cordero, Eloy (asesor) ;
Chetumal, Quintana Roo, México : El Colegio de la Frontera Sur , 2016
Clasificación: TE/333.714097267 / T8
Bibliotecas: Chetumal
Cerrar
SIBE Chetumal
ECO030008627 (Disponible)
Disponibles para prestamo: 1
Resumen en español

Con el objetivo de determinar la presencia y distribución de los metales pesados en la zona cañera de Quintana Roo, se colectaron sedimentos del dren principal y suelos en las parcelas aledañas al mismo, que se desarrollan sobre un acuífero kárstico. Se tomaron 18 muestras de suelo y 10 de sedimentos en la superficie de ambas matrices ambientales en febrero de 2016, correspondiente a la temporada de secas. Se determinaron las concentraciones de Hg, Cd, Cu, Fe y parámetros físico-químicos como el pH y materia orgánica en ambos sustratos y capacidad de intercambio catiónico en suelo. Para comprender la distribución de los metales pesados se obtuvieron estadísticos descriptivos; además de aplicar correlaciones de Pearson, análisis de varianza, pruebas t de Student, análisis de componentes principales y análisis de conglomerados. Las concentraciones promedio de metales pesados encontradas en suelo y sedimentos en orden descendente fueron: Fe > Cu > Cd > Hg con valores en suelo de 25334.13 mg kg-¹, 10.56 mg kg-¹, 0.55 mg kg-¹, 0.02 mg kg-¹, respectivamente; y para sedimento de 19952.68 mg kg-¹, 8.00 mg kg-¹, 0.54 mg kg-1, 0.06 mg kg-¹ respectivamente. Los valores de los parámetros físico-químicos (pH, materia orgánica, capacidad de intercambio catiónico) resultaron homogéneos dentro del área de estudio. Las concentraciones detectadas de Hg, Cd y Cu provienen de fuentes antropogénicas, el Fe se encuentra de manera natural, pero su distribución ha sido afectada, las concentraciones de metales pesados no se asocian linealmente con los parámetros físico-químicos. El factor que determina la distribución de los metales pesados en los suelos agrícolas del área de estudio es el arrastre de arcillas causado por la escorrentía. El mayor aporte de estos contaminantes hacia el dren ocurre principalmente por el arrastre de arcillas provenientes de los suelos de tipo gleysol.

Índice

Capítulo 1.0 Introducción
Capítulo 2.0 Metales pesados en suelos y sedimentos de la zona cañera del sur de Quintana Roo, México
Resumen
Abstract
Introducción
Metodología
Zona de estudio
Muestreo
Acondicionamiento de muestras
Determinación de parámetros fisicoquímicos
Determinación de MP
Análisis estadísticos
Resultados y Discusión
Parámetros fisicoquímicos
Concentraciones de MP en suelos y sedimentos
Relación entre MP y parámetros físico-químicos
Distribución de MP en suelos y sedimentos
Conclusiones
Referencias
Pie de Figuras
Figuras
Capítulo 3.0 Conclusiones
Literatura citada


Resumen en: Inglés |
Resumen en inglés

The purpose of this study was to assess the levels of polybrominated diphenyl ethers (PBDEs), polychlorinated biphenyls (PCBs), dichlorodiphenyltrichloroethane (DDT), dichlorodiphenyldichloroethane (DDE), and four heavy metals (arsenic, cadmium, and lead) in outdoor surface soils (50 samples) collected from the metropolitan area of Monterrey in Mexico. Total PBDEs levels ranged from 1.80 to 127 µg/kg, with mean total PBDEs level of 14.2 ± 21.5 µg/kg (geometric mean ± standard deviation). For PCBs, the mean total level in the studied soils was 23.5 ± 20.2 µg/kg (range 4.0–65.5 µg/kg). An important finding in our study was that all soil samples (100 %) had detectable levels of the metabolite p,p′-DDE. Moreover, the mean total DDT level (∑p′p-DDT and p′p-DDE) was approximately 132 ± 175 µg/kg. The mean levels for arsenic, cadmium, and lead in soil were 5.30 ± 1.35 (range 1.55–7.85) mg/kg, 2.20 ± 1.20 (range 0.65–6.40) mg/kg, and 455 ± 204 (range 224–1230) mg/kg, respectively. Our study has several limitations, the most notable of which is the small sample of soils evaluated. However, this screening study provided concentration data for the occurrence of POPs and four heavy metals in soil from the metropolitan area of Monterrey, Nuevo Leon, Mexico, and taking into consideration that soil is an important pathway of exposure for people, a biomonitoring program for the surveillance of the general population in the metropolitan area of Monterrey, Nuevo Leon is deemed necessary.


20.
Tesis - Licenciatura
Caracterización fisicoquímica de los suelos del cultivo de durazno (Prunus persica) de la comunidad El Duraznal, municipio de San Cristóbal de Las Casas, Chiapas / Roger Espinosa Lázaro
Espinosa Lázaro, Roger ; Carmona de la Torre, Jesús (director) ; Rincón Rosales, Reiner (asesor) ;
Tuxtla Gutiérrez, Chiapas, México : Subsecretaría de Educación Superior, Dirección General de Educación Superior Tecnológica, Instituto Tecnológico de Tuxtla Gutiérrez , 2015
Clasificación: TE/631.42097275 / E8
Bibliotecas: San Cristóbal
Cerrar
SIBE San Cristóbal
ECO010018044 (Disponible)
Disponibles para prestamo: 1
Índice

Índice de Figuras
Índice de Cuadros
I. Introducción
II. Justificación
III. Objetivos
3.1 Objetivo general
3.2 Objetivos específicos
IV. Caracterización del Área Donde Se Desarrolló el Proyecto
4.1 Visión
4.2 Misión
4.3 Principios directrices
4.4 Laboratorios de análisis de suelos y plantas
V. Problemas a Resolver VI. Alcances y Limitaciones
VII. Fundamento Teórico
7.1 Aspectos botánicos del durazno (Prunus pérsica)
7.2 Morfología
7.3 Clasificación taxonómica
7.4 Origen y distribución
7.5 Producción mundial
7.5.1 Producción nacional
7.5.2 Producción a nivel estado
7.6 Característica agrícolas del durazno
7.6.1 Valor nutricional del durazno
7.6.2 Etapa fenológicas del cultivo de durazno
7.6.3 Requerimientos de suelo para el cultivo de durazno
7.6.3.1 Condiciones físicas y químicas del suelo
7.6.4 Épocas de siembra
7.7 Variedades de durazno
7.8 Manejo fitotécnico de plantación
7.8.1 Plagas y enfermedades
7.9 Estructura y función del suelo
7.9.1 Nutrimentos del suelo
7.9.2 Ciclos biogeoquímicos del suelo
7.9.2.1. Ciclo del Nitrógeno
7.9.2.2. Ciclo del carbono
7.9.2.3. Ciclo del fosforo
7.9.2.4. Ciclo del azufre
1.10. Características de la Comunidad el Duraznal
7.10.1. Antecedentes étnicos de la comunidad el Duraznal
7.10.2. Zona de estudio El Duraznal
7.10.3. Descripción de las actividades agrícolas
7.10.4. Características de los suelos y vegetación en la comunidad el Duraznal
VIII. Procedimiento y Descripción de las Actividades Realizadas
8.1. Ubicación del sitio experimental
8.2. Colecta y muestreo de suelos en parcelas demostrativas
8.3. Encuestas técnicas con productores
8.4. Determinación de parámetros físico y químico del suelo
8.4.1. Parámetros físicos
8.4.1.1. Textura
8.4.1.2. Densidad real
8.4.1.3. pH
8.4.1.4. Conductividad eléctrica (CE)

8.4.1.5. Capacidad de Intercambio Catiónico (CIC)
8.4.2. Parámetros químicos
8.4.2.1. Materia orgánica (MO)
8.4.2.2. Nitrógeno total (NT)
8.4.2.3. Fosforo (P)
8.4.2.4. Potasio (K)
8.5. Análisis estadísticos de datos
IX. Resultados y Discusión
9.1. Características del sitio de estudio
9.2. Encuesta Técnicas con Productores
9.3. Características físicas y químicas del suelo de la comunidad El Duraznal
9.4. Análisis de correlación entre los parámetros físicos y químicos analizados en el suelo de las parcelas experimentales del Duraznal
9.5. Transferencia de información técnica a los productores de durazno de la comunidad El Duraznal
9.5.1. Suelo
9.5.2. Riego
9.5.3. Fertilización
IX. Conclusión y Recomendaciones
X. Bibliografía
XI. Anexos