https://socictopen.socict.org/files/original/b8986c862e115b63e9e79730ff0e912b.pdf 79047da83ed4b32c550d1c17bb4cc430 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Agricultura sostenible Description An account of the resource Dominio científico: Agricultura sostenible Text A resource consisting primarily of words for reading. Examples include books, letters, dissertations, poems, newspapers, articles, archives of mailing lists. Note that facsimiles or images of texts are still of the genre Text. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Soil properties in areas submitted to organic and natural management in highland region of Rio de Janeiro State / <br> Caracterização de propriedades edáficas em áreas sob manejo orgânico e natural na região serrana do Estado do Rio de Janeiro Creator An entity primarily responsible for making the resource Marcos Gervasio Pereira, Arcângelo Loss, Alexandre Ravelli, Sirgiane Vianna Cardozo Description An account of the resource This work was accomplished in Nova Friburgo, highland region of Rio de Janeiro State. It was studied two rural properties whose producers use organic and natural management of the soil. The natural management differs from the organic for not using crop rotation and organic fertilization with animal dejections. The two rural properties present distinct soil classes; therefore, a comparison among the two soil management systems was not possible. The study had as main objective to evaluate the degree of modification of soil properties in areas submitted to organic and natural management. In each area soil samples were collected under crop areas and control. In natural management, the control was a fallow area. In organic management, the control was a secondary forest area. The results showed that in the area under natural crop management levels of Ca, Ca+Mg, P and pH in water were statistically higher, when compared to the control. For H+Al, the highest values occurred in the reference area, when compared to cultivated areas. In the organic management, higher values of Ca, Ca + Mg, Na, K and P were observed in the crop area in all depths. However, for H + Al and NO3 - , the higher values were found in the control area. A degradation of the soil physical properties in the area under natural management was indicated by variation in aggregate stability and soil bulk density, but the organic management has benefited those properties. The selected and evaluated variables were capable to discriminate the different management systems studied by the main components analysis.Foram estudadas duas propriedades rurais em Nova Friburgo, RJ, com sistemas alternativos de produção, manejo orgânico e manejo natural do solo. O manejo natural difere do orgânico por não utilizar rotação de culturas e adubação orgânica com dejetos animais. As propriedades rurais apresentam classes de solos distintas, não sendo possível haver uma comparação entre os sistemas de manejo. O estudo teve como objetivo, avaliar o grau de modificação das propriedades edáficas em áreas submetidas aos manejos orgânico e natural. Em cada área foram coletadas amostras de terra sob áreas de cultivo e testemunha. No manejo natural, a testemunha foi uma área em pousio. No manejo orgânico, a testemunha foi uma área de floresta secundária. Os resultados mostraram que os teores de Ca, Ca + Mg, P e pH na área sob manejo natural, foram mais altos e estatisticamente significativos sob cultivo, quando comparados à área testemunha. Para o conteúdo de H + Al, os maiores valores ocorrem na área testemunha, em relação à área de cultivo. No sistema de manejo orgânico foram verificados maiores valores de Ca, Ca + Mg, Na, K e P na área sob cultivo, em todas as profundidades. No entanto, para H + Al e NO3 -, os maiores valores foram encontrados na área testemunha. Observou-se uma deterioração das propriedades físicas do solo (DMP e Ds) na área sob manejo natural. Em relação ao manejo orgânico, este beneficiou essas propriedades. As variáveis selecionadas e avaliadas por meio da análise de componentes principais serviu para discriminar as formas de manejo estudadas. Date A point or period of time associated with an event in the lifecycle of the resource 2008 Subject The topic of the resource Agricultura natural, Agricultura orgânica, Olericultura Identifier An unambiguous reference to the resource within a given context 10.5433/1679-0359.2008v29n3p515 Source A related resource from which the described resource is derived Semina: Ciências Agrárias Publisher An entity responsible for making the resource available Universidade Estadual de Londrina Coverage The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant Agriculture (General) Relation A related resource <a href="http://www.uel.br/revistas/uel/index.php/semagrarias/article/view/2763" target="_blank" rel="noreferrer noopener">http://www.uel.br/revistas/uel/index.php/semagrarias/article/view/2763</a>