3299 results

Geochemical background and geopedological interactions of selenium in soils from Piauí state, Northeastern Brazil

Gustavo de Sousa de Oliveira Leite ORCID logo , Clístenes Williams Araújo do Nascimento ORCID logo , Rennan Cabral Nascimento ORCID logo , Cácio Luiz Boechat ORCID logo , Pâmalla Graziely Carvalho Morais ORCID logo , Paloma Cunha Saraiva ORCID logo , [...]

25/Mar/2024

ABSTRACT Although Selenium (Se) plays a role as a micronutrient for humans through vegetable consumption, it is also recognized as toxic when present in excessive quantities. Therefore, quantifying Se contents in soils can prevent diseases influenced by crop Se deficiency or excess. We aimed to measure background contents, establish quality reference values (QRV) for Se in soils from two Brazilian biomes (Cerrado and Caatinga), and assess how geopedological factors affect Se content and spatial variability. Two hundred and eight composite […]

Visual Abstract

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 […]

Oxidative stress as markers in identification of aluminum-tolerant peach tree rootstock cultivars and clonal selections

Marcos Vinícius Miranda Aguilar ORCID logo , Gerâne Silva Wertonge ORCID logo , Thalía Preussler Birck ORCID logo , Luana da Rosa Lovato ORCID logo , Flaiane Catarine Rosa da Rosa ORCID logo , Jacson Hindersmann ORCID logo , [...]

11/Mar/2024

ABSTRACT Peach rootstock and scion cultivars are selected in breeding programs considering resistance to pests and diseases, salt tolerance, drought tolerance, and vigor. However, rootstock tolerance to aluminum (Al), which is markedly present in tropical and subtropical soils of the world, is not considered. Thus, it is essential to define potential markers that can contribute to the selection of Al-resistant or Al-tolerant peach rootstocks. The objective of this study was to identify Al-tolerant peach tree rootstock cultivars and clonal selections […]

Visual Abstract

Nitrification inhibitor addition to farm dairy effluent to reduce nitrous oxide emissions

Vanina Rosa Noemí Cosentino ORCID logo , Romina Ingrid Romaniuk ORCID logo , Natalia Andrea Mórtola ORCID logo , Edit Otero Estrada ORCID logo , Nicole Martinek ORCID logo , Marcelo Javier Beltran ORCID logo , [...]

11/Mar/2024

ABSTRACT Increasing the use of nitrogen (N) fertilizers will be necessary to enhance grain and pasture yields to satisfy the growing world demand for food. Organic amendments, such as farm dairy effluents (FDE), are an alternative to traditional synthetic fertilizers. However, part of the applied N could be lost as ammonia (NH3) volatilization or nitrous oxide (N2O) emission, decreasing N availability to plants. Nitrification inhibitors, such as dicyandiamide (DCD), suppress the microbial process of nitrification, decreasing soil nitrate concentration and, […]

Visual Abstract

Disposal of solid waste from civil construction: a screening proposal for a suitability system and case study in Nepomuceno, Minas Gerais

Luana Sousa Costa ORCID logo , Marcelo Henrique Procópio Pelegrino ORCID logo , Bruno Silva Villela ORCID logo , Maria Eduarda Carvalho Monteiro ORCID logo , Raísa Brito Vilela ORCID logo , Daniela de Fátima Pedroso ORCID logo , [...]

11/Mar/2024

ABSTRACT Most Brazilian municipalities do not have regulated areas for solid waste disposal in civil construction. Usually, residues are disposed of vacant lots and dumps, posing risks to the population health and the environment. Soils are the primary means for the disposal or recycling of waste, highlighting the importance of well-characterized soils and their respective landscape. This study aimed to establish a land suitability system for solid residues in civil construction and apply such information in a case study in […]

Visual Abstract

Differential effects on soil water repellency of Eucalyptus and Pinus plantations replacing natural pastures

Maximiliano González-Sosa ORCID logo , Pablo González-Barrios ORCID logo , Oscar José Bentancur ORCID logo , Mario Pérez-Bidegain ORCID logo

11/Mar/2024

ABSTRACT Land-use changes from native pastures to forest plantations in humid temperate areas have raised concerns about their potential impact on the environment. This study aimed to assess the effects of such changes on soil water properties, focusing on the impact of the forest species planted and their relationship with changes in soil C content. Specifically, we aimed to identify the development of surficial soil hydrophobicity and changes in soil water holding capacity. A long-term forest experiment with variable planting […]

Visual Abstract

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 […]

Visual Abstract

Grazing intensity and nitrogen fertilization timing to increase soil organic carbon stock and nitrogen in integrated crop-livestock systems

Talyta Zortéa ORCID logo , Tangriani Simioni Assmann ORCID logo , Carolina Riviera Duarte Maluche Baretta ORCID logo , Andre Brugnara Soares ORCID logo , Juliana Aparecida Marchetti ORCID logo , Rafaela Dulcieli Daneluz Rintzel ORCID logo , [...]

07/Dec/2023

ABSTRACT Integrated crop-livestock systems (ICLS) foster synergistic relationships to increase nitrogen (N) cycling and soil organic carbon (SOC) accrual in agricultural setups. This study evaluated how the grazing intensity and N fertilization (rates and timing) affect both SOC and N fractions, and soil organic matter chemical composition in an ICLS managed under no-tillage in an Oxisol, six years after initiation. The ICLS was compared to a nearby pasture (PA) and a native forest (NF). The treatments consisted of two grazing […]

Visual Abstract

Inversion of soil properties with hyperspectral reflectance in construction areas of high-standard farmland

Zhang Qiuxia ORCID logo , Liu Wenkai, Zhang Hebing ORCID logo , Wang Xinsheng ORCID logo , Ma Shouchen

07/Dec/2023

ABSTRACT High-standard farmland construction is an important process that can enhance food security and accelerate new-style modernization agriculture. Hyperspectral remote sensing can provide data and technical support for this type of construction to provide a reference when optimizing high-standard farmland construction areas. This study was performed in Xinzheng City, the primary grain-producing areas in Henan Province. Field sampling and indoor hyperspectral spectroscopy (350~2500 nm) were combined; spectral transformations such as continuum removal (CR) were performed after Savitzky‒Golay (SG) convolution smoothing; […]

Carbon and nitrogen stocks in a Rhodic Nitisol under different tillage methods and mineral and organic fertilizers

Camila Rosana Wuaden ORCID logo , Rodrigo da Silveira Nicoloso ORCID logo , Paulo Cezar Cassol ORCID logo , Caroline Aparecida Matias ORCID logo , Letícia Paweukievicz ORCID logo

07/Dec/2023

ABSTRACT Changes in soil management, for example by more vigorous crops, adoption of conservation tillage and optimization of fertilization, can increase soil organic carbon (SOC) and total nitrogen (TN) stocks. We hypothesized that corn – black oat rotation under no-tillage (NT) and adequate soil fertilization can increase these stocks, compared to conventional tillage (CT). This study compared these two tillage methods and organic with mineral fertilizers, regarding their effects on C and N cycling and SOC and TN stocks in […]

1 9 10 11 12 13 330