3296 results

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/Dec/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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Rhizosphere microbiome engineering of Triticum aestivum L.

Shabana Wagi ORCID logo , Peer Schenk ORCID logo , Ambreen Ahmed ORCID logo , Eladl Eltanahay ORCID logo

07/Dec/2023

ABSTRACT Root-associated microbiomes (RAMs) are complex microbial communities, essential for plant growth and development. The RAMs interact with the roots, maintain the root architecture, protect plants from a plethora of pathogens and biotic and abiotic stress and intensify nutrient uptake, i.e., improve plant growth and yield. A wide variety of microbial populations is usually found in the rhizosphere. Plant exudates also play a significant role in the establishment of rhizospheric microbial communities. This study deals with the approach of microbiome […]

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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Slope position controls prescribed fire effects on soil: a case study in the high-elevation grassland of Itatiaia National Park

Ana Paula Pessim de Oliveira ORCID logo , Eduardo Carvalho da Silva Neto ORCID logo , Robson Altiellys Tosta Marcondes ORCID logo , Marcos Gervasio Pereira ORCID logo , Marcelo Souza Motta ORCID logo , Yan Vidal de Figueiredo Gomes Diniz ORCID logo , [...]

28/Nov/2023

ABSTRACT There is a need for greater knowledge about the medium- and long-term effects of prescribed fire management on soil in ecosystems prone to wildfires and more vulnerable to climate change. This study examined the short- and medium-term effects of prescribed fire on soil chemical properties and chemical fractions of soil organic matter (SOM) in two positions of the landscape in a high-elevation grassland environment. The ecosystem is located in the mountain peaks of southeastern Brazil associated with the Atlantic […]

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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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Rock-soil skeleton increases water infiltration

Suélen Matiasso Fachi ORCID logo , Paulo Ivonir Gubiani ORCID logo , Fabrício de Araújo Pedron ORCID logo , Lucas Raimundo Rauber ORCID logo

28/Nov/2023

ABSTRACT A widespread assumption among researchers and technicians is that stony soils are more susceptible to degradation. However, the role of rock fragments in the hydrology of stony soils, especially in regard to infiltration, is still a research gap. The aim of this study was to test the hypothesis that an increase in rock fragments in the soil profile increases the water infiltration rate. Infiltration tests using a double-ring infiltrometer were conducted on February 11, 2021, and December 11, 2022, […]

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Establishing environmental soil phosphorus thresholds to mitigate its transfer to water bodies in Mato Grosso State, Brazil

Walquiria Chaves da Silva ORCID logo , Paulo Cezar Cassol ORCID logo , Rodrigo da Silveira Nicoloso ORCID logo , Gilmar Luiz Mumbach ORCID logo , Daniel João Dall''Orsoletta ORCID logo , Douglas Luiz Grando ORCID logo , [...]

28/Nov/2023

ABSTRACT Excessive phosphorus (P) applications can increase nutrient levels in the soil, facilitating its transference to aquatic environments and causing contamination. Thus, the environmental P threshold (P-threshold) is a tool to establish a sound level of P in the soil, in which P values below the threshold are harmless to the environment. This study aimed to establish a P-threshold equation for the soils of Mato Grosso State, Brazil. Twenty samples of representative soils from the main swine production regions of […]

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Microstructural changes in Oxisols under long-term different management systems

Aristides Osvaldo Ngolo ORCID logo , Fábio Soares de Oliveira ORCID logo , Maurílio Fernandes de Oliveira ORCID logo , Raphael Bragança Alves Fernandes ORCID logo

28/Nov/2023

ABSTRACT There has long been a discussion about the effects of soil management on its structure. Since changes can occur due to management and time of use, more accurate assessments can be achieved if carried out in long-term experiments. This study investigated the long-term effects of soil management on the physical quality of a Cerrado Oxisol (Latossolo Vermelho), focusing on microstructural changes. Micromorphology and computed tomography techniques were used to assess the soil’s microstructure. The study compared areas under long-term […]

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/Oct/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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Hydropedological digital mapping: machine learning applied to spectral VIS-IR and radiometric data dimensionality reduction

Priscilla Azevedo dos Santos ORCID logo , Helena Saraiva Koenow Pinheiro ORCID logo , Waldir de Carvalho Carvalho ORCID logo , Igor Leite da Silva ORCID logo , Nilson Rendeiro Pereira ORCID logo , Silvio Barge Bhering ORCID logo , [...]

03/Oct/2023

ABSTRACT Pedosphere-hydrosphere interface accounts for the association between soil hydrology and landscape, represented by topographic and Remote Sensing data support and integration. This study aimed to analyze different statistical radiometric and spectral data selection methods and dimensionality reduce environment-related data to support the classification of soil physical-hydric properties, such as soil basic infiltration rate (bir) and saturated hydraulic conductivity (Ksat); as well as to act in data mining processes applied to hydropedological properties digital mapping. Accordingly, research integrated information from […]

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