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All publications of “Cássio Antonio Tormena”

51 results

Is Structural Quality as Assessed by the “Profil Cultural” Method Related to Quantitative Indicators of Soil Physical Quality?

Rafaela Watanabe, Cássio Antonio Tormena, Maria de Fátima Guimarães, João Tavares, Ricardo Ralisch, Julio Franchini, [...]


ABSTRACT Soil and crop management systems change the soil structure, thereby affecting soil quality. The “profil cultural” method (PCM) has been used to identify the effects of management systems on soil structure; however, few studies relate the structures identified by the PCM to quantitative indicators of soil structural quality. This study aimed to quantify soil structures using the PCM and relate these structures to bulk density (Bd), critical bulk density (Bdc), soil aeration capacity (εa), least limiting water range (LLWR), […]

Soil Quality Evaluation Using the Soil Management Assessment Framework (SMAF) in Brazilian Oxisols with Contrasting Texture

Maurício Roberto Cherubin, Cássio Antônio Tormena, Douglas L. Karlen


ABSTRACT The Soil Management Assessment Framework (SMAF) was developed in the U.S.A. and has been used as a tool for assessing and quantifying changes in soil quality/health (SQ) induced by land uses and agricultural practices in that region and elsewhere throughout the world. An initial study using SMAF in Brazil was recently published, but additional research for a variety of soils and management systems is still needed. Our objective was to use data from five studies in southern Brazil to […]

Sampling Position under No-Tillage System Affects the Results of Soil Physical Properties

Camila Jorge Bernabé Ferreira, Cássio Antonio Tormena, Wagner Henrique Moreira, Lincoln Zotarelli, Edner Betioli, Guilherme Anghinoni


ABSTRACT Understanding the spatial behavior of soil physical properties under no-tillage system (NT) is required for the adoption and maintenance of a sustainable soil management system. The aims of this study were to quantify soil bulk density (BD), porosity in the soil macropore domain (PORp) and in the soil matrix domain (PORm), air capacity in the soil matrix (ACm), field capacity (FC), and soil water storage capacity (FC/TP) in the row (R), interrow (IR), and intermediate position between R and […]

Occasional Soil Turnover and Liming in a Clayey Oxisol Under a Consolidated No-tillage System

Jonez Fidalski, Renato Yagi, Cássio Antonio Tormena


ABSTRACT Accumulation of nutrients and surface compaction have been reported after a long time under a no-tillage system. The aim of this study was to evaluate soil chemical properties, bulk density, and crop yield following a single mechanical intervention associated with liming in a clayey Oxisol under a NT system for 17 consecutive years in Pato Branco, southwestern Paraná, Brazil. A randomized block experimental design was used in a split-plot arrangement, with plowing and harrowing of the soil in the […]

Air Permeability of the Soil Seedbed under a No-Tillage System

Osvaldo Guedes, Alvaro Pires da Silva, Neyde Fabíola Balarezo Giarola, Cássio Antônio Tormena


Air permeability may be used as a soil physical quality indicator. The objective of this study was to determine the air permeability and pore continuity index for the seedbed of an Oxisol cultivated under a no-tillage system that underwent mechanical chiseling and biological promotion of pore formation using the forage radish crop. The study was carried out in an experimental area of the Universidade Estadual de Ponta Grossa (Ponta Grossa State University), Parana, Brazil. The treatments were 18 consecutive years […]

Soil Load-Bearing Capacity in Orange Grove Conservation Systems

Jonez Fidalski, Karina Maria Vieira Cavalieri-Polizeli, Cássio Antonio Tormena, Guilherme Anghinoni, Pedro Antonio Martins Auler


Conservation tillage systems in orange groves can increase soil load-bearing capacity minimizing their risks of soil compaction. The objective of this study was to evaluate load-bearing capacity through preconsolidation pressure and its dependence on water content, bulk density, and organic carbon of a Typic Paleudult soil 18 years after setting up permanent plant cover between the rows of an orange grove. A randomized block experimental design was used, with three replications. Three groundcover treatments subjected to mowing between the rows […]


Valter Roberto Schaffrath, Antônio Carlos Andrade Gonçalves, António Jorge Sousa, Cássio Antonio Tormena


The spatial correlation between soil properties and weeds is relevant in agronomic and environmental terms. The analysis of this correlation is crucial for the interpretation of its meaning, for influencing factors such as dispersal mechanisms, seed production and survival, and the range of influence of soil management techniques. This study aimed to evaluate the spatial correlation between the physical properties of soil and weeds in no-tillage (NT) and conventional tillage (CT) systems. The following physical properties of soil and weeds […]

Quantification of the least limiting water range in an oxisol using two methodological strategies

Wagner Henrique Moreira, Cássio Antônio Tormena, Edner Betioli Junior, Getulio Coutinho Figueiredo, Álvaro Pires da Silva, Neyde Fabíola Balarezo Giarola


The least limiting water range (LLWR) has been used as an indicator of soil physical quality as it represents, in a single parameter, the soil physical properties directly linked to plant growth, with the exception of temperature. The usual procedure for obtaining the LLWR involves determination of the water retention curve (WRC) and the soil resistance to penetration curve (SRC) in soil samples with undisturbed structure in the laboratory. Determination of the WRC and SRC using field measurements (in situ […]

Soil chemical atributes associated with wheat yield in a plot with different yield potentials

Luiz Fernando Machado Kramer, Marcelo Marques Lopes Müller, Cassio Antônio Tormena, Aline Marques Genú, Leandro Michalovicz, Marcelo Vicensi


Different yield potentials between plots and within them have been verified in areas managed under no-till (NT). Precision farming (PF) techniques can help in identifying these distinct areas, but for efficient soil fertility management in areas under long-term NT, there must be representative sampling. The aim of this study was to evaluate the influence of soil chemical properties on wheat yield in accordance with the sampling layer or depth in an area under long-term NT using zones of a plot […]

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 […]

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