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Nitrous Oxide Emissions in a Wheat/Corn Succession Combining Dairy Slurry and Urea as Nitrogen Sources

Celso Aita, Felipe Tonetto, Rogerio Gonzatto, Stefen Barbosa Pujol, Janquieli Schirmann, Juliano dos Santos Depoi, [...]

03/May/2018

ABSTRACT: The impact on nitrous oxide (N2O) emissions caused by combining dairy slurry (DS) and urea to supply crops with nitrogen (N) is still not well characterized. The main objective of this study was to compare the differences between N2O emissions in the cases of exclusive use of urea and the combined use of DS and urea as N sources to no-tillage wheat and corn. We also compared N2O emissions between two DS application methods (surface-broadcast vs. injection), as well […]

Visual Evaluation of the Soil Structure under Different Management Systems in Lowlands in Southern Brazil

Ivana Kruger Tuchtenhagen, Cláudia Liane Rodrigues de Lima, Adilson Luís Bamberg, Rachel Muylaert Locks Guimarães, Pulido-Moncada Mansonia

20/Apr/2018

ABSTRACT The “Visual Evaluation of Soil Structure” (VESS) is a method used primarily to evaluate the soil structural quality of Oxisols in Brazil and secondly for more specific research, consultancy, and teaching purposes. Since the methodology was never applied and compared with laboratory evaluations of physical properties of hydromorphic soils of the Pampa biome in the south of Brazil, this study evaluated the use of VESS as a visual indicator of the structure quality of a typic eutrophic Albaqualf soil […]

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, [...]

01/Feb/2018

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), […]

Water Erosion in a Long-Term Soil Management Experiment with a Humic Cambisol

Jefferson Schick, Ildegardis Bertol, Fabrício Tondello Barbosa, David José Miquelluti, Neroli Pedro Cogo

01/Aug/2017

ABSTRACT Water erosion, the main factor in soil degradation, is strongly influenced by soil cover and management. The objective of this study was to determine soil and water losses under natural rainfall conditions from 1993 to 2012 in the southern Santa Catarina Plateau, Brazil, in 3.5 × 22.1 m plots with crops in rotation to study the following management treatments: conventional tillage (CT), minimum tillage (MT), and no-tillage (NT), and a treatment with bare soil (BS). The soil cover remaining […]

Effects of Soil Management Practices on Water Erosion under Natural Rainfall Conditions on a Humic Dystrudept

Vinicius Ferreira Chaves de Souza, Ildegardis Bertol, Neuro Hilton Wolschick

12/Jun/2017

ABSTRACT Water erosion is the main cause of soil degradation and is influenced by rainfall, soil, topography, land use, soil cover and management, and conservation practices. The objective of this study was to quantify water erosion in a Humic Dystrudept in two experiments. In experiment I, treatments consisted of different rates of fertilizer applied to the soil surface under no-tillage conditions. In experiment II, treatments consisted of a no-tillage in natural rangeland, burned natural rangeland and natural rangeland. Forage turnip, […]

Collembola Community Structure as a Tool to Assess Land Use Effects on Soil Quality

Luís Carlos Iuñes de Oliveira Filho, Osmar Klauberg Filho, Dilmar Baretta, Cynthia Akemi Shinozaki Tanaka, José Paulo Sousa

09/Dec/2016

ABSTRACT: Collembolan species are differently affected by soil tillage (conventional, minimum tillage, and no-tillage) and are known to modify plant growth. This study relies on the relationships between Collembola community structures and land use systems as a proxy for characterizing changes in soil quality. Thus, Collembola community structure (eco-morphological groups – edaphic, hemiedaphic and epigeic, and morphotypes) were examined in a no-tillage system and crop-livestock integration system to evaluate the discriminative power of the Collembola community structure and to determine […]

Carbon Stocks in Compartments of Soil Organic Matter 31 Years after Substitution of Native Cerrado Vegetation by Agroecosystems

Eloisa Aparecida Belleza Ferreira, Mercedes Maria da Cunha Bustamante, Dimas Vital Siqueira Resck, Cícero Célio de Figueiredo, Alexandre de Siqueira Pinto, Juaci Vitória Malaquias

13/Apr/2016

ABSTRACT Changes in carbon stocks in different compartments of soil organic matter of a clayey Latossolo Vermelho Distrófico (Typic Haplustox), caused by the substitution of native savanna vegetation (cerrado sensu stricto) by agroecosystems, were assessed after 31 years of cultivation. Under native vegetation, a stock of 164.5 Mg ha-1 C was estimated in the 0.00-1.00 m layer. After 31 years of cultivation, these changes in soil C stocks were detected to a depth of 0.60 m. In the case of […]

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

12/Apr/2016

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 […]

ORGANIC CARBON CONTENTS AND STOCKS IN PARTICLE SIZE FRACTIONS OF A TYPIC HAPLUDOX FERTILIZED WITH PIG SLURRY AND SOLUBLE FERTILIZER

Maria Sueli Heberle Mafra, Paulo Cezar Cassol, Jackson Adriano Albuquerque, Marco André Grohskopf, Andreia Patrícia Andrade, Luiz Paulo Rauber, [...]

01/Jul/2015

The use of pig slurry (PS) as fertilizer can affect the soil quality and increase total stocks of soil organic carbon (TOC). However, the effects of PS on TOC amount and forms in the soil are not fully understood, particularly in areas under no-tillage (NT). The purpose of this study was to determine TOC contents and stocks in the particulate (POC) and mineral-associated C fractions (MAC) of an Oxisol after nine years of maize-oat rotation under NT, with annual applications […]

PHYSICAL, CHEMICAL, AND BIOLOGICAL QUALITY IN AN OXISOL UNDER DIFFERENT TILLAGE AND FERTILIZER SOURCES

Maurício Roberto Cherubin, Mateus Tonini Eitelwein, Cristiano Fabbris, Sidinei Wolnei Weirich, Rodrigo Ferreira da Silva, Vanderlei Rodrigues da Silva e, [...]

01/Mar/2015

Soil quality (SQ) assessment is an important strategy for defining management practices and systems capable of maintaining and/or improving the sustainability of agricultural systems. Thus, the aim of this study was to evaluate changes in SQ by physical, chemical, and biological indicators in an Oxisol under different tillage systems and fertilizer sources. The study was conducted in Taquaruçu do Sul, RS, Brazil based on an experiment set up in 2009 in a randomized block design with four replications. The treatments […]

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