252 results

Saturated hydraulic conductivity and steady-state infiltration rate database for Brazilian soils

Marta Vasconcelos Ottoni ORCID logo , Wenceslau Geraldes Teixeira ORCID logo , Aline Mari Huf dos Reis ORCID logo , Letícia Guimarães Pimentel ORCID logo , Luciana Rodrigues Souza ORCID logo , Jackson Adriano Albuquerque ORCID logo , [...]

20/jan/2025

ABSTRACT Soil saturated hydraulic conductivity (Ksat) and steady-state infiltration rate (SSIR) are essential and necessary soil properties for different geoscience applications. Values of these hydraulic properties for the Brazilian territory are difficult to access and are dispersed in research efforts carried out around the country. This study developed an easy-to-manipulate, freely accessible database of soil saturated hydraulic conductivity, comprising field and laboratory analyses, and steady-state infiltration rates for Brazilian soils. This database was named Ksat-SSIR-DB. One analysis of the Ksat-SSIR-DB […]

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Soil fauna diversity in integrated production systems in the Brazilian Cerrado

Smaiello Flores da Conceição Borges dos Santos ORCID logo , Henrique Antunes de Souza ORCID logo , Luís Alfredo Pinheiro Leal Nunes ORCID logo , Lucrécia Pacheco Batista ORCID logo , Michaelly Heidy Moraes Matos ORCID logo , Geania de Sousa Vera ORCID logo , [...]

12/dez/2024

ABSTRACT Soil fauna is an important indicator of soil quality. This study aimed to evaluate soil fauna collected using pitfall traps and soil chemical and microbiological properties under different land uses in the Cerrado. The systems evaluated were soybean under 14-year no-till; soybean under 3-year no-till; eucalyptus rows; soybean grown between eucalyptus rows, and native Cerrado. Collected individuals were identified as classes, subclasses, order, or family classes. We evaluated the number of individuals trap-1 day-1, total richness, average richness, Shannon […]

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Influence of Solenopsis invicta Buren on soil chemical properties, silicon pools, and phytolith assemblages in organic agricultural soils

Carlos Alberto Ribeiro de Moura ORCID logo , Eduardo Carvalho da Silva Neto ORCID logo , Marcos Gervasio Pereira ORCID logo , Maria Elizabeth Fernandes Correia ORCID logo

25/nov/2024

ABSTRACT Ants mediate ecosystem services that can modulate crop performance and overall agroecosystem functioning. Our study investigated how the activity of Solenopsis invicta Buren (Hymenoptera: Formicidae) influences soil chemical properties, soil silicon pools, and soil phytoliths. We hypothesized Solenopsis invicta Buren activity would increase the macronutrient content, available silicon for plants (PASi), and amorphous silicon (ASi) in nest soils, which is related to changes in the phytolith assemblage. This study was conducted on agricultural soil under organic management, covering an […]

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Soil hydraulic properties, mineralogical alteration and pore formation in Regosols from southern Brazil

Fabrício de Araújo Pedron ORCID logo , Gabriel Antônio Deobald ORCID logo , Paulo Ivonir Gubiani ORCID logo , Luís Antônio Coutrim dos Santos ORCID logo , Antônio Carlos de Azevedo ORCID logo , José Miguel Reichert ORCID logo , [...]

27/ago/2024

ABSTRACT Regosols (Neossolos) are soils with use limitations mainly related to effective depth, abundant presence of rock and saprolite fragments, and frequently high slope gradients; besides that, they represent a new agricultural frontier for grain production in southern Brazil. This study evaluated soil saturated hydraulic conductivity (Ksat) and water retention and availability in Regosols and saprolites derived from volcanic rocks in southern Brazil and the relationship of these variables with porosity in saprolithic horizons characterized by mineralogical weathering. The study […]

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Automatic measurement of water infiltration into the soil

Lucas Raimundo Rauber ORCID logo , Micael Stolben Mallman ORCID logo , Dalvan José Reinert ORCID logo , Fábio Soares Pires ORCID logo , Francieli de Vargas ORCID logo , Paulo Ivonir Gubiani ORCID logo

30/abr/2024

ABSTRACT In hydrological modeling and for the development of projects related to soil and water conservation and civil engineering, determination of water infiltration variables into the soil plays a key role. However, measuring infiltration with manual infiltrometers is work-intensive and requires several people, which casts doubts on the consistency of the process description. Our objective was to develop automated and compact systems for data acquisition by double-concentric-ring and Cornell infiltrometers. The systems are based on air differential pressure sensors and […]

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Subsurface evaluation for aquaculture ponds in the Amazon Region

Pedro Andrés Chira Oliva ORCID logo , João Andrade dos Reis Júnior ORCID logo , Karina Palheta Gomes ORCID logo , Ramon Torres Pena ORCID logo , Ingracia Santiago Nunes ORCID logo , Samuel da Costa dos Santos ORCID logo , [...]

08/abr/2024

ABSTRACT Few Brazilian rural landowners are aware of the technology available to survey the subsoil of terrains earmarked for aquaculture operations. This study evaluated subsoils of Monte Alegre (area 1) and Montenegro 3 (area 2) aquaculture zones in the geographic region of Bragança (Amazon region, northern Brazil), and the adequacy of these areas for aquaculture. Ground Penetrating Radar, electrical conductivity measurements, and sedimentological analyses were applied to evaluate the subsoil of fish farms. Apparent conductivity values recorded by the Electromagnetic […]

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Limiting physical properties of Technosols formed by the Fundão dam failure, Minas Gerais, Brazil

Betsy Carolina Muñoz de Páez ORCID logo , Moacir de Souza Dias Junior ORCID logo , Eduardo da Costa Severiano ORCID logo , Marco Aurélio Carbone Carneiro ORCID logo , Paula Cristina Caruana Martins ORCID logo

27/mar/2024

ABSTRACT Physical properties of the Technosols formed by the tailings deposition may constitute a physical barrier that limits water movement and plant development due to the properties received from those sediments. This study aimed to evaluate the physical quality of the Technosols formed by the deposition of sediments displaced by the Fundão Dam failure, Mariana, Minas Gerais State, Brazil, based on the evaluation of physical properties and Load Bearing Capacity Models (LBCM). For that, three areas under different vegetation types […]

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Soil diversity metabarcoding from cacao crop wild relatives in a tropical biodiversity hot spot in Colombia

Luis Alberto Chica Cárdenas ORCID logo , Monica Arias Peñaloza, Martha Lucía Cepeda Hernández ORCID logo , Martha Josefina Vives Flórez ORCID logo

26/mar/2024

ABSTRACT Theobroma cacao, the source for chocolate fabrication, is a high-value crop that faces challenges such as the impact of climate change, pathogens, and cadmium accumulation. Soil associated with T. cacao has been extensively studied, looking for bio-controllers and microorganisms capable of Cd accumulation. However, there is no information about the microbial structure and interactions occurring in soil associated with cacao wild relatives, which represent a repository for biological diversity and its potential for biotechnological applications. We performed an extracellular […]

Origin and properties of kaolinites from soils of a toposequence in Southern Brazil

Daniela Nicole Ferreira ORCID logo , Vander de Freitas Melo ORCID logo , Samara Alves Testoni ORCID logo , Pablo Vidal-Torrado ORCID logo , Jairo Calderari de Oliveira Junior ORCID logo

25/mar/2024

ABSTRACT Kaolinite is the main clay mineral in most soils around the world and has been widely used for industrial purposes. This research aimed to study chemical, morphological and crystallographic characteristics of kaolinite, and establish the origin of kaolinitic samples on Serra do Mar and kaolinitic layers on peatlands, located at Southern Brazil. Samples were collected on different geomorphological positions: two samples at Serra do Mar (kaolinitic saprolite – SAP, and kaolinitic layers – KL); and two cores at the […]

Soil physical, chemical and biological properties in Conilon coffee intercropping systems

Joabe Martins de Souza ORCID logo , Fábio Ribeiro Pires ORCID logo , José Ricardo Macedo Pezzopane ORCID logo , Kristhiano Chagas ORCID logo , Alex Favaro Nascimento ORCID logo , José de Oliveira Rodrigues ORCID logo , [...]

25/mar/2024

ABSTRACT Shaded coffee systems may offer a series of benefits, however, studies on shaded cultivation of Conilon coffee crops are still scarce in the literature. This study aimed to evaluate the soil physical, chemical, and biological properties of two Conilon coffee intercropping systems from southeastern Brazil. Two commercial coffee crops – one shaded by macadamia trees and the other by green dwarf coconut trees – were evaluated according to three treatments: coffee plants in the inter-row of the tree species; […]

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