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Resultados 246897-246916 de 269024

    • Soil CH4 and N2O emissions from rice paddy fields in southern Brazil as affected by crop management levels : a three-year field study 

      Zschornack, Tiago; Rosa, Carla Machado da; Reis, Cecília Estima Sacramento dos; Pedroso, Gabriel Munhoz; Camargo, Estefânia Silva; Santos, Daiane Carvalho dos; Boeni, Madalena; Bayer, Cimelio (2018) [Artigo de periódico]
      Rice yield increases in response to improvements in crop management, but the impact on greenhouse gas (GHG) emissions in the subtropical region of Southern Brazil remains unknown. A three-year field study was developed ...

    • Soil compressibility under irrigated perennial and annual crops in a semi-arid environment 

      Watanabe, Rafaela; Figueiredo, Getulio Coutinho; Silva, Álvaro Pires da; Neves, Júlio César L.; Oliveira, Teogenes Senna de (2017) [Artigo de periódico]
      In irrigated soils, a continuous state of high moisture reduces resistance of the soil to applied external forces, favouring compaction. The aim of this study was to evaluate the susceptibility to compaction of developed ...

    • Soil corrosion of the AISI1020 steel buried near electrical power transmission line towers 

      Fraga, Anderson de Oliveira; Klunk, Marcos Antonio; Oliveira, Adriano Agnoletto; Furtado, Gilnei Goncalves; Knörnschild, Gerhard Hans; Dick, Luis Frederico Pinheiro (2014) [Artigo de periódico]
      Soil corrosion of carbon steel samples buried up to hundred days close to a high voltage power transmission line tower was examined by weight loss vs. time. A higher weight loss was observed if the samples were electrically ...

    • Soil erodibility under natural rainfall conditions as the K factor of the universal soil loss equation and application of the nomograph for a subtropical ultisol 

      Cassol, Elemar Antonino; Silva, Tiago Stumpf da; Eltz, Flavio Luiz Foletto; Levien, Renato (2018) [Artigo de periódico]
      Erodibility represents the intrinsic susceptibility of the soil to the erosion process, represented by the K factor in the Universal Soil Loss Equation (USLE). In Brazil, there are few field experiments determined with a ...

    • Soil fungistasis against fusarium graminearum under different crop management systems 

      Lisboa, Bruno Britto; Bayer, Cimelio; Passaglia, Luciane Maria Pereira; Camargo, Flavio Anastacio de Oliveira; Silveira, Anelise Beneduzi da; Silveira, Adriana Ambrosini da; Vargas, Luciano Kayser (2015) [Artigo de periódico]
      Soil management, in terms of tillage and cropping systems, strongly influences the biological properties of soil involved in the suppression of plant diseases. Fungistasis mediated by soil microbiota is an important component ...

    • Soil loss and runoff in southern Brazil in conservation systems : a long-term experiment 

      Dambros, Liana; Lima, Luciana da Silva Corrêa; Barros, Cláudia Alessandra Peixoto de; Cassol, Elemar Antonino (2024) [Artigo de periódico]
      Brazil has high soil loss rates due to its tropical and subtropical climate characteristics. In this sense, soil use and management practices may minimize such losses. In this study, experimental plots were monitored for ...

    • Soil methane oxidation in a long-term no-tillage system in Southern Brazil 

      Bayer, Cimelio; Gomes, Juliana; Vieira, Frederico Costa Beber; Zanatta, Josiléia Acordi; Piccolo, Marisa Cássia; Dieckow, Jeferson (2013) [Artigo de periódico]

    • Soil moisture and soybean physiology affected by drought in an integrated crop-livestock system 

      Martins, Amanda Posselt; Costa, Sérgio Ely Valadão Gigante de Andrade; Anghinoni, Ibanor; Kunrath, Taise Robinson; Cecagno, Diego; Reichert, Jose Miguel; Balerini, Fabrício; Dillenburg, Lucia Rebello; Carvalho, Paulo Cesar de Faccio (2016) [Artigo de periódico]
      The objective of this work was to evaluate the impact of grazing intensities after 11 years of an integrated crop-livestock system, under no-tillage, on soil moisture and soybean physiological parameters during a summer ...

    • Soil moisture estimation with GNSS reflectometry : a conceptual review 

      Euriques, Jorge Felipe; Krueger, Cláudia Pereira; Machado, Wagner Carrupt; Sapucci, Luiz Fernando; Geremia-Nievinski, Felipe (2021) [Artigo de periódico]
      Soil moisture monitoring enables efficient management and use of water resources, having great importance for several purposes, such as: monitoring of risk areas; delimitation of areas susceptible to flooding; geotechnical ...

    • Soil organic carbon in an integrated crop-livestock system under different grazing intensities 

      Cecagno, Diego; Gomes, Murilo Veloso; Costa, Sérgio Ely Valadão Gigante de Andrade; Martins, Amanda Posselt; Denardin, Luiz Gustavo de Oliveira; Bayer, Cimelio; Anghinoni, Ibanor; Carvalho, Paulo Cesar de Faccio (2018) [Artigo de periódico]
      An integrated crop-livestock system (ICLS) under no-till may be an effective tool to promote soil organic carbon (SOC) accumulation. However, it is not yet clear how pasture management affects SOC accumulation. In this ...

    • Soil organic matter in fire-affected pastures and in an Araucaria forest in South-Brazilian Leptosols 

      Potes, Mariana da Luz; Dick, Deborah Pinheiro; Santana, Graciele Sarante; Tomazi, Michely; Bayer, Cimelio (2012) [Artigo de periódico]
      The objective of this work was to evaluate the distribution pattern and composition of soil organic matter (SOM) and its physical pools of Leptosols periodically affected by fire over the last 100 years in South Brazil. ...

    • Soil penetration resistance mapping quality : effect of the number of subsamples 

      Pias, Osmar Henrique de Castro; Cherubin, Maurício Roberto; Basso, Claudir José; Santi, Antônio Luis; Molin, José Paulo; Bayer, Cimelio (2018) [Artigo de periódico]
      There is no consensus in the literature regarding how many subsamples are needed to perform accurate on-farm soil penetration resistance (SPR) mapping. Therefore, the objective of this study was to define the number of ...

    • Soil physical and hydraulic changes in different yielding zones under no-tillage in Brazil 

      Santi, Antônio Luis; Damian, Junior Melo; Cherubin, Maurício Roberto; Amado, Telmo Jorge Carneiro; Eitelwein, Mateus Tonini; Vian, André Luis; Bejarano Herrera, Wilfrand Ferney (2016) [Artigo de periódico]
      Soil physical and structural degradation may influence crop productivity over time in long-term notillage system areas. A field study was conducted at two sites, Palmeira das Missões and Não-MeToque, in southern Brazil to ...

    • Soil physical and hydraulic properties in the Donato stream basin, RS, Brazil part 1 : spatial variability 

      Siqueira, Tirzah Moreira; Louzada, José Antônio Saldanha; Pedrollo, Olavo Correa; Castro, Nilza Maria dos Reis; Oliveira, Marquis Henrique Campos de (2019) [Artigo de periódico]
      The processes of water flow and water storage in the soil are directly associated with its hydraulic properties, which may vary significantly in space. Therefore, this study aimed to perform a spatial analysis of saturated ...

    • Soil physical and hydraulic properties in the Donato stream basin, RS, Brazil part 2 : geostatistical simulation 

      Siqueira, Tirzah Moreira; Louzada, José Antônio Saldanha; Pedrollo, Olavo Correa; Castro, Nilza Maria dos Reis; Oliveira, Marquis Henrique Campos de (2019) [Artigo de periódico]
      Geostatistical simulation has been the most promising and used technique for the analysis of uncertainties of soil physical and hydraulic properties, with high spatial heterogeneity. This study carried out a stochastic ...

    • Soil seed bank in a subtropical grassland under different grazing intensities 

      Silva, Graziela Har Minervini; Overbeck, Gerhard Ernst (2020) [Artigo de periódico]
      Grazing is an important determinant for the composition and structure of grasslands; however, soil seed bank (SSB) response to grazing intensity is poorly investigated. We analyzed SSB richness and density in a subtropical ...

    • Soil seed bank variation patterns according to environmental factors in a natural grassland 

      Maia, Fernanda Costa; Medeiros, Renato Borges de; Pillar, Valerio de Patta; Focht, Telmo (2004) [Artigo de periódico]
      O trabalho objetivou determinar o banco de sementes presente em uma área excluída de campo natural localizado na região sul do Brasil e sua correspondência com fatores abióticos que possuem influência no desenvolvimento e ...

    • Soil susceptibility to compaction under use conditions in southern Brazil 

      Mazurana, Michael; Levien, Renato; Inda Junior, Alberto Vasconcellos; Conte, Osmar; Bressani, Luiz Antonio; Müller, Jônatan (2017) [Artigo de periódico]
      The degree of soil compaction is intensified by its inadequate management, compaction being variable depending on soil type since even under identical management conditions, different types have different abilities to ...

    • Soil variability in different landscape positions in the Porto Alegre Botanical Garden, Southern Brazil 

      Silva Neto, Luis de França da; Nascimento, Paulo Cesar do; Inda Junior, Alberto Vasconcellos; Silva, Edsleine Ribeiro (2015) [Artigo de periódico]
      Knowledge of soil characteristics in areas where activities related to the environment are developed, such as Porto Alegre Botanical Garden (JB-PoA), is a fundamental condition for the sustainable use of this natural ...

    • A soja como tema interdisciplinar para a aprendizagem de conceitos químicos 

      Freddi, Junior Alessandro (2019) [Dissertação]
      Esta dissertação é resultado do Mestrado Profissional em Química em rede nacional (PROFQUI/UFRGS). No referencial teórico estão contempladas as questões: pedagógica na qual define-se a Situação de Estudo (SE), metodológica ...