252 results

Microbial contribution to the carbon flux in the soil: A literature review

Lucas Carvalho Basilio Azevedo ORCID logo , Simone Cristina Braga Bertini ORCID logo , Adão Siqueira Ferreira ORCID logo , Nathalia Silva Rodovalho ORCID logo , Luiz Fernando Romanholo Ferreira ORCID logo , Ajay Kumar ORCID logo

25/mar/2024

ABSTRACT Carbon flows into and out of the soil are important processes that contribute to controlling the global climate. The relationship between soil organisms and the climate is interdependent since the organisms that contribute to carbon and greenhouse gas fluxes are simultaneously affected by climate change and soil management. Temperature, soil moisture, pH, nutrient level, redox potential and organic matter quality are key elements affecting the microorganisms involved in organic carbon flows in the soil. Climate, topography (slope and position […]

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Steady infiltration rate: Relation to antecedent soil moisture, soil permeability, and measurement method and period

Lucas Raimundo Rauber ORCID logo , Dalvan José Reinert ORCID logo , Paulo Ivonir Gubiani ORCID logo , Suelen Matiasso Fachi ORCID logo

16/jan/2024

ABSTRACT Soil steady water infiltration rate (SIR) is a key variable in hydrological modeling, but its relationship to antecedent soil moisture is not yet well understood. We tested the hypothesis that the SIR decreases with the increase in antecedent moisture, and that this relationship depends on permeability to water on the soil surface, the measurement method, and the measurement period. We conducted an experiment in an Argissolo Vermelho-Amarelo Distrófico abrúptico (Psammentic Paleudult – Soil Taxonomy), measuring infiltration in up to […]

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Physiological and morphological responses of Arabica coffee cultivars to soil compaction

Elísia Gomes Ramos ORCID logo , Vanessa Maria de Souza Barros ORCID logo , José Danizete Brás Miranda ORCID logo , Laís Maria Rodrigues Silva ORCID logo , Júlio Cesar Lima Neves ORCID logo , Renata Maria Strozi Alves Meira ORCID logo , [...]

07/dez/2023

ABSTRACT Compaction caused by mechanization affects soil quality and, consequently, the development of crops. This study aimed to evaluate the effect of different degrees of soil compaction on the physiology, morphology, and anatomy of different coffee cultivars in a controlled environment. The experiment was carried out in a greenhouse, with randomized block design in a 5 × 5 factorial arrangement, with five coffee cultivars (Arara, Catuaí Amarelo IAC 62, Catuaí Vermelho 144, MGS Paraíso 2 and Mundo Novo IAC 379-19) […]

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Inoculation effects of growthpromoting bacteria on corn root architecture: influence of nitrogen levels, bacterial populations, and plant genotypes

Albiane Carvalho Dias ORCID logo , Gabriela Cavalcanti Alves ORCID logo , Thamires Ferreira Rodrigues da Silva ORCID logo , Veronica Massena Reis ORCID logo

07/dez/2023

ABSTRACT Inoculating corn with diazotrophic bacteria as growth promoters has been demonstrated to be an efficient agricultural practice in Brazil, mainly due to the root stimulation they provide to plants. This study investigates the corn (Zea mays L.) root architecture in a greenhouse assay where A. baldaniorum Sp245 and H. seropedicae ZAE94 strains were inoculated and evaluated for 22 days under two N levels: 0.6 and 6 mmol L-1 of N. Short-term bioassays were conducted to assess the plant’s response […]

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Edaphic properties in a eucalyptusforest ecotone in the Nova Baden State Park, Southeastern Brazil

Ariovaldo Machado Fonseca Júnior ORCID logo , Luiz Alberto Silva Rodrigues Pinto ORCID logo , Cristiane Figueira da Silva ORCID logo , Robert Ferreira ORCID logo , Igor de Sousa Morais ORCID logo , Rodrigo Camara ORCID logo , [...]

07/dez/2023

ABSTRACT State parks are integral protection units created to protect ecosystems. However, anthropic activities may have been previously performed before their creation, forming transitional areas. Studies that evaluate the modifications of edaphic properties in these environments are scarce. The aim of this study was to evaluate the changes in soil properties and litter stock in areas of eucalyptus-forest ecotones. Litter stock (Stocklitter) and total soil organic carbon content and stock (TOCsoil), weighted mean diameter (MWD), origin of aggregates (biogenic or […]

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Cracking process in expansive soil with and without vegetation covers in dry and rainy seasons at field scale

Silvio Romero de Melo Ferreira ORCID logo , Arthur Gomes Dantas Araújo ORCID logo , Martha Maria Bezerra Santos ORCID logo

28/nov/2023

ABSTRACT The presence of desiccation cracks in the soil alters its hydromechanical behavior, increasing the soil’s water infiltration capacity, mobilizing the potential for expansion. This may affect the performance of the structural elements of the construction. This study aimed to evaluate the mechanics of expansion, contraction and cracking of the expansive soil of Paulista – Pernambuco, Brazil, through field trials, subject to wetting cycles and drying. The studied soil is a sandy silty clay of high compressibility with medium to […]

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Soil microbial properties are improved by the adoption of soil management and conservation practices in no-tillage system

Jhonatan Spliethoff ORCID logo , Adriana Knob ORCID logo , Leandro Rampim ORCID logo , Marcelo Marques Lopes Müller ORCID logo , Cristiano Andre Pott ORCID logo

28/nov/2023

ABSTRACT No-tillage system (NTS) plays a prominent role in conservation agriculture, however, its benefits can be further improved by adopting complementary soil management and conservation practices, such as using autumnal cover crops, contour seeding, and terraces. This study aimed to evaluate how soil biological activity responds to soil management and conservation systems. The treatments consisted of three macroplots with an area of 11.000 m2 each, as follows: a) Non-Terraced catchment (NTC), cultivated in NTS similar to most farmers of the […]

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Cadmium and copper transport in alluvial soils in the Brazilian semiarid region: column percolation and modeling

Vitor Hugo de Oliveira Barros ORCID logo , Adriana Thays Araújo Alves ORCID logo , Severino Martins dos Santos Neto ORCID logo , Artur Paiva Coutinho ORCID logo , Laurent Lassabatere ORCID logo , Manuella Virgínia Salgueiro Gondim ORCID logo , [...]

03/out/2023

ABSTRACT Regarding the Brazilian textile industry, part of the northeast region stands out as the second-largest textile manufacturing hub in the country. Despite its importance, this industrial activity has been bringing relevant environmental concerns regarding the disposal of textile effluents, especially from industrial laundries. This waste contains many chemicals and among them are various types of heavy metals. To assess environmental risks associated with heavy metals, pollutant transfer needs to be investigated. This study evaluated the retention and mobility of […]

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Changes in physical and hydraulic properties in sandy soils of the Pampa Biome under different uses

Rodrigo de Moraes Galarza ORCID logo , Rodrigo Pivoto Mulazzani ORCID logo , Daniel Boeno ORCID logo , Paulo Ivonir Gubiani ORCID logo

03/out/2023

ABSTRACT The naturally fragile sandy soils of the Pampa Biome (PB) may be degraded with the introduction of poorly managed agricultural crops. Anthropic use can markedly decrease vegetation cover on sandy soils, leaving them more exposed to erosive agents. Decreases in organic matter content, biodiversity, and nutrient availability, increased soil compaction, and decreased water availability are also some of the impacts caused on PB soils by implementing poorly managed agricultural crops. In Rio Grande do Sul, in areas with sandier […]

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Conservation agriculture practices in a peanut cropping system: Effects on pod yield and soil penetration resistance

Olavo Betiol ORCID logo , Denizart Bolonhezi ORCID logo , Élcio Ríos Perez Leal ORCID logo , Chandler Edwin Gruener ORCID logo , Marcos Doniseti Michelotto ORCID logo , Carlos Eduardo Angeli Furlani ORCID logo , [...]

16/ago/2023

ABSTRACT Conservation agriculture principles applied to peanut can reduce soil erosion and production costs when cultivated in rotation with sugarcane. Still, the problem with soil compaction is the leading cause of skepticism about the efficacy of this practice. This research aimed to study the effect of three soil management strategies compared with conventional for peanut cv. IAC-OL3, cultivated in rotation with sugarcane using the MEIOSI (method of intercropping occurring simultaneously) system for agronomic practices with additional analysis on changes in […]

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