44 results

Physical properties of a Brazilian sandy loam soil after the traffic of a military vehicle M113 BR

Beatriz Wardzinski Barbosa ORCID logo , Fabrício de Araújo Pedron ORCID logo , Cândida Regina Müller ORCID logo , Miriam Fernanda Rodrigues ORCID logo , Paulo Ivonir Gubiani ORCID logo , Ricardo Bergamo Schenato ORCID logo , [...]

06/Nov/2020

ABSTRACT Soil physical properties can be changed after vehicle traffic, especially by heavy military tracked vehicles. The Santa Maria military Instruction Field, where the experiment was carried out, is currently the most used area for armored tracked vehicles training in Brazil, with the M113 BR being the main equipment. The aim of this study was to determine the effect of the straight line and pivoted traffic intensity of the M113 BR on the physical properties and advancement of the compaction […]

Visual Abstract

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 […]

Soil Properties and Carbon Accumulation in an Integrated Crop-Livestock System Under No-Tillage

Nídia Raquel Costa, Marcelo Andreotti, Keny Samejima Mascarenhas Lopes, Kazuo Leonardo Yokobatake, João Paulo Ferreira, Cristiano Magalhães Pariz, [...]

01/May/2015

In production systems such as the integrated crop-livestock system (ICL) under no-tillage, improvements have been observed in chemical, physical, and biological soil properties. Therefore, we aimed to evaluate the changes in chemical and physical soil properties, as well as carbon (C) accumulation, in an Oxisol under irrigated conditions in the Cerrado (Brazilian tropical savanna) in an ICL system under no-tillage. The experiment was carried during the growing of 2010/2011, 2011/2012, and 2012/2013. A randomized block experimental design with four replications […]

Effect of cropping systems in no-till farming on the quality of a Brazilian Oxisol

Getulio de Freitas Seben Junior, José Eduardo Corá, Rattan Lal

01/Aug/2014

The no-till system with complex cropping sequences may improve the structural quality and carbon (C) sequestration in soils of the tropics. Thus, the objective of this study was to evaluate the effects of cropping sequences after eight years under the no-till system on the physical properties and C sequestration in an Oxisol in the municipality of Jaboticabal, Sao Paulo, Brazil. A randomized split-block design with three replications was used. The treatments were combinations of three summer cropping sequences – corn/corn […]

The effects of land use and soil management on the physical properties of an Oxisol in Southeast Brazil

Getulio de Freitas Seben Junior, José Eduardo Corá, Rattan Lal

01/Aug/2014

Soils of the tropics are prone to a decrease in quality after conversion from native forest (FO) to a conventional tillage system (CT). However, the adoption of no-tillage (NT) and complex crop rotations may improve soil structural quality. Thus, the aim of this study was to evaluate the physical properties of an Oxisol under FO, CT, and three summer crop sequences in NT: continuous corn (NTcc), continuous soybean (NTcs), and a soybean/corn rotation (NTscr). Both NT and CT decreased soil […]

Tensile strength of aggregates and compressibility of a soil built up with cover crops in a coal mining area in Candiota, RS, Brazil

Diony Alves Reis, Cláudia Liane Rodrigues de Lima, Eloy Antonio Pauletto

01/Apr/2014

Land reclamation after coal mining is essential for the sustainability of that environment. This study aimed to evaluate the structural quality of a soil built up under different cover crops, taking a soil built up without cover crops and natural soil under native vegetation across from the mining operation as references. It may be concluded that cover crops, especially Tanzania (Panicum maximum), contributed to improvement of the structural quality of the built-up soil, reducing bulk density and increasing macroporosity, total […]

Soil physical properties under maize in monoculture or intercropped with summer legumes

Emerson Dalla Chieza, Thomé Lovato, Ednaldo Da Silva Araújo, Jonatan Tonin

01/Oct/2013

The use of cover crops is a practice that can improve the physical quality of soils. The objective of this work was to evaluate the potential of intercropping of summer legumes with maize to improve soil physical properties. The study was conducted in the field from September 2008 to September 2009, in an Ultisol in Santa Maria, Rio Grande do Sul. The experiment was arranged in a randomized block design with five treatments and four replications. The treatments consisted of […]

Soil physical properties and maize root growth in an ultisol under controlled machine traffic

Michael Mazurana, Jessé Rodrigo Fink, Victor Hugo da Silveira, Renato Levien, Lucas Zulpo, Darlan Brezolin

01/Oct/2013

Soil functions can be hampered by compaction induced by inadequate management. Some soil physical properties are indicators of the existence of compacted layers that can affect the root development of crops. Agricultural practices, e.g., planting of cover crops to improve soil properties, can mitigate the compaction-related problems. The aim of this study was to evaluate the physical attributes of soil and plants, grown under controlled conditions. In an Ultisol under no-tillage with two winter cover crops (fallow and oat + […]

Structural sustainability of cambisol under different land use system

Paula Cristina Caruana Martins, Moacir de Souza Dias Junior, Ayodele Ebenezer Ajayi, Fátima Maria de Souza Moreira

01/Dec/2012

Incongruous management techniques have been associated with some significant loss of agricultural land to degradation in many parts of the world. Land degradation results in the alteration of physical, chemical and biological properties of the soil, thereby posing a serious threat to sustainable agricultural development. In this study, our objective is to evaluate the changes in a Cambisol structure under six land use systems using the load bearing capacity model. Sampling was conducted in Amazonas Region, Brazil, in the following […]

Least limiting water range and degree of soil compaction of an oxisol after 30 years of no-tillage

Edner Betioli Júnior, Wagner Henrique Moreira, Cássio Antônio Tormena, Camila Jorge Bernabé Ferreira, Álvaro Pires da Silva, Neyde Fabíola Balarezo Giarola

01/Jun/2012

The soil physical quality is one of the factors that determine the agronomic, economic and environmental sustainability in long-term no-tillage systems (NT). Soil compaction has been discussed as a factor that contributes to a reduction in physical quality under NT. However, the use of NT can increase soil organic matter and lead to a continuous and stable porous system that mitigates the negative impacts of compaction. The purpose of this study was to evaluate the physical quality of an Oxisol […]

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