• en
46 results

Physical, Chemical, and Microbiological Properties of Soil under Different Plant Covers in the Seridó Desertification Region in the Brazilian Semiarid

Adriana Ferreira Martins, Ignácio Hernan Salcedo, Flávio Pereira de Oliveira ORCID logo , Walter Esfrain Pereira


ABSTRACT The Seridó Desertification Region is a result of inadequate management of the native Caatinga vegetation, which generated degraded areas with little or no capacity for plant production. The area has experienced a succession of different land uses, but little is known about the impact of these changes. The present study tested the hypothesis that the intense degradation of the Caatinga drastically decreased vegetal biomass production, which favored direct soil exposure and resulted in a lower abundance and diversity of […]

Aggregate Stability in Soil with Humic and Histic Horizons in a Toposequence under Araucaria Forest

Daniel Hanke, Deborah Pinheiro Dick


ABSTRACT Aggregate stability is one of the most important factors in soil conservation and maintenance of soil environmental functions. The objective of this study was to investigate the aggregate stability mechanisms related to chemical composition of organic matter in soil profiles with humic and histic horizons in a toposequence under Araucaria moist forest in southern Brazil. The soils sampled were classified as Humic Hapludox (highest position), Fluvaquentic Humaquepts (lowest slope position), and Typic Haplosaprists (floodplain). The C and N contents […]

Physical Properties of a Hapludox after Three Decades under Different Soil Management Systems

Franciani Rodrigues da Silva, Jackson Adriano Albuquerque, André da Costa, Sandra Mara Vieira Fontoura, Cimélio Bayer and, Maria Izabel Warmling


ABSTRACT Changes in soil physical properties due to different management systems occur slowly, and long-term studies are needed to assess soil quality. The objectives of this study were to evaluate the effects of soil management systems and liming methods on the physical properties of a Latossolo Bruno Alumínico típico (Hapludox). A long-term experiment that began in 1978 with conventional and no-tillage systems was assessed. In addition, different liming methods (no lime, incorporated lime, and lime on the soil surface) have […]


Wellingthon da Silva Guimarães Júnnyor, Eduardo da Costa Severiano, Alessandro Guerra da Silva, Wainer Gomes Gonçalves, Renata Andrade, Brendow Roberto Rodrigues Martins, [...]


ABSTRACT Increasing attention has recently been given to sweet sorghum as a renewable raw material for ethanol production, mainly because its cultivation can be fully mechanized. However, the intensive use of agricultural machinery causes soil structural degradation, especially when performed under inadequate conditions of soil moisture. The aims of this study were to evaluate the physical quality of a Latossolo Vermelho Distroférrico (Oxisol) under compaction and its components on sweet sorghum yield forsecond cropsowing in the Brazilian Cerrado (Brazilian tropical […]


Sabrina Passoni, Luiz Fernando Pires, Richard Heck, Jadir Aparecido Rosa


Analysis of the soil pore system represents an important way of characterizing soil structure. Properties such as the shape and number of pores can be determined through soil pore evaluations. This study presents a three-dimensional (3D) characterization of the shape and number of pores of a sub-tropical soil. To do so, a second generation X-ray microtomograph equipped with a plain type detector was employed. A voltage of 120 kV and current of 80 mA was applied to the X-ray tube. […]


Laura Fernanda Simões da Silva, Mara de Andrade Marinho, Edson Eiji Matsura, Miguel Cooper, Ricardo Ralisch


In evaluation of soil quality for agricultural use, soil structure is one of the most important properties, which is influenced not only by climate, biological activity, and management practices but also by mechanical and physico-chemical forces acting in the soil. The purpose of this study was to evaluate the influence of conventional agricultural management on the structure and microstructure of a Latossolo Vermelho distroférrico típico (Rhodic Hapludox) in an experimental area planted to maize. Soil morphology was described using the […]

Changes in a Rhodic Hapludox under no-tillage and urban waste compost in the northwest of Rio Grande do Sul, Brazil

Moacir Tuzzin de Moraes, Vanderlei Rodrigues da Silva, Maurício Roberto Cherubin, Reimar Carlesso, Henrique Debiasi, Renato Levien


The use of urban waste compost as nutrient source in agriculture has been a subject of investigation in Brazil and elsewhere, although the effects on soil physical and chemical properties and processes are still poorly known. The aim of this study was to evaluate the effect of application of urban waste compost and mineral fertilizer on soil aggregate stability and organic carbon and total nitrogen content of a Rhodic Hapludox under no-tillage in the northwestern region of Rio Grande do […]

Influence of the grazing height of ryegrass and oat on the physical properties of an Oxisol after seven years of crop-livestock system

Wagner Henrique Moreira, Cássio Antonio Tormena, Edner Betioli Junior, Leonardo Pim Petean, Sérgio José Alves


The pressure applied by animal hooves can lead to soil surface compaction in a crop-livestock system (CLIS), with effects on soil physical quality. The hypothesis of this study was that the trampling of animals as a result of grazing on oat and ryegrass crops in a Latossolo Vermelho distroférrico (Oxisol) under no-tillage in a CLIS degrades soil physical quality. The aim of this study was to evaluate the effect of different grazing heights on soil bulk density (BD), total porosity […]

Alternative method for quantification of the least limiting water range in the laboratory

Wagner Henrique Moreira, Leonardo Pim Petean, Edner Betioli Junior, Cássio Antonio Tormena, Getúlio Coutinho Figueiredo, Álvaro Pires da Silva


The least limiting water range (LLWR) is defined by the amplitude of the water content (θ) in the soil in which limitations to plant growth associated with water availability, aeration and soil resistance to penetration (SR) are minimal. In general, LLWR determination requires expensive equipment, and obtaining water retention and SR data is laborious. The use of pressure membranes and Richards’ pressure plates requires a long time to determine the water retention curve (WRC) due to the need for achieving […]

Least limiting water range for the assessment of soil physical degradation

Rachel Muylaert Locks Guimarães, Cássio Antonio Tormena, Éverton Blainski, Jonez Fidalski


The effects of soil use and management on soil physical quality have been largely discussed due to its environmental and agronomic impacts. The least limiting water range (LLWR) is a modern indicator of soil physical quality that can indicate processes and mechanisms linked to soil physical degradation caused by soil use and management. The aim of this work was to quantify the influence of different land uses and soil tillage on the LLWR of an Oxisol (170, 40 and 790 […]

1 2 3 5