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AGRONOMICAL ATTRIBUTES OF SOYBEANS AND SOIL RESISTANCE TO PENETRATION IN NO-TILLAGE AND CHISELED SURFACES REA
Cortez,Jorge W.; Mauad,Munir; Souza,Luiz C. F. de; Rufino,Mauricio V.; Souza,Paulo H. N. de.
ABSTRACT Farming systems may affect soil properties and crop production of components, decreasing yields. This study aimed to assess penetration resistance (PR) and agronomic traits of soybeans under no-tillage (NT) and chiseling (CP). The experiment was carried out in a randomized block with two treatments (tillage and scarification) with 12 repetitions; yet soil penetration resistance (PR) was assessed in a factorial block, considering farming systems and sampling sites (row and interrows). PR was measured with an impact penetrometer, sampling in row and interrows within a 22.5 x 0.1 m2 mesh grid up to 0.60 m depth. The obtained values were higher for NT in the 0.10-0.20 m layer. Great PR values in interrows were only registered within the surface layer....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Compaction; Soil physics; Chiseling.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000100098
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Avaliation of the soil preparation quality in minimum cultivation area planted with eucalypt PFB - Pesquisa Florestal Brasileira
Gava, José Luiz.
Evaluations, of the quality of soil preparation in the plantation lines, were made in areas with potential risk of compaction using the penetrometer to collect data about the depth and width of the furrow. The samplings were made in three sites of production of Eucalyptus in areas of Cia Suzano de Papel e Celulose in the state of São Paulo, managed under minimum cultivation of the soil and where crop was mechanized and intensive. The statistical evaluation of the quality was made through the measurement and assessment of the results of the soil preparation, comparing the results with the technical quality standards pre-established by the company. The data were analyzed graphically and statistically. In the graphic analysis of the three sites sampled, the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Quality control; Compaction; Soil preparation; Sub soiling Controle de qualidade; Compactação; Preparo de solo; Subsolagem.
Ano: 2003 URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1608
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Changes in water availability in the soil due to tractor traffic REA
Gómez-Rodríguez,Katherine; Camacho-Tamayo,Jesús H.; Vélez-Sánchez,Javier E..
Frequent traffic of tractors in agricultural soils, promotes soil compaction and affects the flow and water availability. The aim of this research was to study the effect of compaction induced by tractor traffic on water availability in the soil under different traffic intensities on the same path (0, 1, 3, 6 and 10 passages), to two tractors with 3.3 and 2.6 ton of weights, over three different surface conditions. The study was conducted in an Andisol, representative soil of the study area. It was determined the behavior of the water retention curve, obtaining the gravitational water, available water and hygroscopic water, to 10 and 30 cm of depth. The hygroscopic water is the most prevalent with values ​​of up to 80% of the total water present in the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Compaction; Soil management; Water retention curve; Andisol.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000600008
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Compared performance of penetrometers and effect of soil water content on penetration resistance measurements Rev. Bras. Ciênc. Solo
Mome Filho,Edison Aparecido; Silva,Alvaro Pires da; Figueiredo,Getulio Coutinho; Gimenes,Fernando Henrique Setti; Vitti,André Cesar.
Modern agriculture techniques have a great impact on crops and soil quality, especially by the increased machinery traffic and weight. Several devices have been developed for determining soil properties in the field, aimed at managing compacted areas. Penetrometry is a widely used technique; however, there are several types of penetrometers, which have different action modes that can affect the soil resistance measurement. The objective of this study was to compare the functionality of two penetrometry methods (manual and automated mode) in the field identification of compacted, highly mechanized sugarcane areas, considering the influence of soil water volumetric content (θ) on soil penetration resistance (PR). Three sugarcane fields on a Rhodic Eutrudrox...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Sugarcane; Mechanization; Compaction; Soil water content.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000300006
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DYNAMIC OF PRESSURE-DEFORMATION CURVE IN UNIAXIAL COMPRESSION TEST IN DIFFERENT LOAD TIMES REA
Mazurana,Michael; Levien,Renato; Zulpo,Lucas; Passos,Gabrielle M.; Kerpen,Hyran S..
ABSTRACT: The loading application time by machinery tires and agricultural tires is one of the factors of soil compaction. We evaluated the effect of loading reduction time in uniaxial compression test, in laboratory, in some physical and mechanical parameters, approaching the loading field condition time by machinery with laboratory tests. Soil samples of two Oxisol and one Paleudult under different years of implementation of no tillage system (NT) and of different layers were collected and subjected to uniaxial compression tests, two times of loading application, 300 seconds per load, according to actual methodology and 30 seconds per load in the laboratory. We analyzed the soil deformation to each load, bulk density, pre-compression stress, recompress...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Loading bearing support; Compaction; Recompression index.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000500973
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Effect of different tillage and residue management practices on growth and yield of corn cultivation in Thailand CIGR Journal
Sornpoon, Wlaiwan; Jayasuriya, Hemantha P. W..
The tillage and residue management during soil bed preparation need to be in appropriate manner for sustainable farming practice.  The effects of tillage and residue management methods on corn cropping were studied on loamy soil in Bangrakum district, Phitsanulok Province, Thailand.  The effects of five commonly used tillage methods: subsoiler tillage (ST), three methods of conventional tillage (CT1, CT2 and CT3), no-tillage (NT), as main factors and two corn residue management methods; burned (R1) and unburned (R2), as sub-factors were studied in a randomized strip plot configuration.  Tillage treatment showed significant effect on physical and chemical soil properties, plant growth and development, grain yield, total aboveground biomass and most...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agricultural Engineering; Tillage optimization Tillage; No-tillage; Emergence; Compaction; Subsoiler; Biomass.
Ano: 2013 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2235
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Estimation of precompression stress in an Ultisol cultivated with sugarcane AGRIAMBI
Mendes,Pericles M. B.; Rolim,Mário M.; Lima,Renato P. de; Pedrosa,Elvira M. R.; Tavares,Uilka E.; Simões Neto,Djalma E..
ABSTRACT Compressive soil properties are typically used for the understanding of compaction process. As an alternative to laboratory tests, pedo-transfer functions have been used to estimate the mechanical behaviour of soil as a function of soil physical parameters. The impact of soil bulk density (BD) and gravimetric water content (w) was examined on soil strength and pedo-transfer functions were proposed to predict the precompression stress (σp) in an Ultisol cultivated with sugarcane. Undisturbed soil cores were sampled at the depths of 0-0.20 and 0.20-0.40 m, subjected to different water contents, and subsequently, compression tests were performed to determine σp. The data were subjected to analysis of variance and regression analysis. Bulk density and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Compaction; Soil compressibility; Coastal tablelands.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000500336
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Evaluation of corn planter under travel speed, working depth, pressure wheel and cone index CIGR Journal
Khodaei, Mehdi.
Compaction is one of the restricting factors in desirable seed germination and root growth. As a sign for soil compaction can be a criterion for optimal seed germination. Seeds require some compression of the surrounding soil at planting for optimum growth, which it is made by pressure wheels in planters. Travel speed and working depth affect the soil cone index. A field experiments were conducted to evaluate the effects of the speed and working depth in the beginning of the autumn season. Experiments were performed in the form of factorial split-plot based on a randomized complete block design with two factors, the travel speed (3, 4, and 6 km/h) and working depth (3, 6, 9, 12 and 15 cm) in three replication. Digital cone Penetrometer was used for...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Compaction; Cone index; Corn planter; Depth; Moving speed; Pressure wheel.
Ano: 2015 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3364
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Field Performance of a Winged Scarifier as a Function of Soil Compaction and Water Content Chilean J. Agric. Res.
Cholaky,Carmen; Cisneros,José M; Balbuena,Roberto.
Initial soil conditions, operational aspects, and tool shape affect the efficiency of soil decompaction. The objective of this study was to evaluate the performance of a winged scarifier as a function of soil compaction and edaphic water content. The experiment was carried out in a typical Hapludoll. Treatments considered two soil compaction levels: high (HC) and low compaction (LC); and three soil water contents: wet (WS), humid (HS), and dry (DS) with 9, 14, and 19% gravimetric water content, respectively. A split-plot randomized block design was applied. Tractive effort, disturbed area, tillage depth, specific resistance, and power were evaluated. Results showed that tractive effort was 17% greater in HC than LC, and in both cases HS was greater than WS...
Tipo: Journal article Palavras-chave: Agricultural engineering; Winged scarifier; Bulk density; Water content; Compaction.
Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000100016
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GPS receivers for georeferencing of spatial variability of soil attributes REA
Rosalen,David L; Rodrigues,Marcos S; Chioderoli,Carlos A; Brandão,Flavia J. C; Siqueira,Diego S.
The characterization of the spatial variability of soil attributes is essential to support agricultural practices in a sustainable manner. The use of geostatistics to characterize spatial variability of these attributes, such as soil resistance to penetration (RP) and gravimetric soil moisture (GM) is now usual practice in precision agriculture. The result of geostatistical analysis is dependent on the sample density and other factors according to the georeferencing methodology used. Thus, this study aimed to compare two methods of georeferencing to characterize the spatial variability of RP and GM as well as the spatial correlation of these variables. Sampling grid of 60 points spaced 20 m was used. For RP measurements, an electronic penetrometer was used...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Precision agriculture; GNSS; Compaction; Soil water content.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162011000600013
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Implications of the variability in soil penetration resistance for statistical analysis Rev. Bras. Ciênc. Solo
Gubiani,Paulo Ivonir; Reichert,José Miguel; Reinert,Dalvan José; Gelain,Neiva Somavilla.
Soil penetration resistance (PR) is a measure of soil compaction closely related to soil structure and plant growth. However, the variability in PR hampers the statistical analyses. This study aimed to evaluate the variability of soil PR on the efficiency of parametric and nonparametric analyses in indentifying significant effects of soil compaction and to classify the coefficient of variation of PR into low, medium, high and very high. On six dates, the PR of a typical dystrophic Red Ultisol under continuous no-tillage for 16 years was measured. Three tillage and/or traffic conditions were established with the application of: (i) no chiseling or additional traffic, (ii) additional compaction, and (iii) chiseling. On each date, the nineteen PR data...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Compaction; Coefficient of variation; Normality.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000500003
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Influence of compaction of a forest soil on the soil fauna in a subtropical region: I. Oribatei (Acari, Cryptostigmata) and Collembola (Insecta) Zoologia
Ushiwata,Cláudio T; Sautter,Klaus Dieter; Kobiyama,Masato.
An experiment to observe some changes of composition and population of Oribatei and Collembola was carried out on a Cambicsoil covered with Pinus taeda L. (Pinaceae). This study area is located on the Canguiri Experimental Station Center, Universidade Federal do Paraná, 20km north to Curitiba city, Brazil. The climate of the area is subtropical. The observations resulted in a conclusion that the compaction strongly changes the structure of edaphic mesofauna community as the consequence of the modification of physical properties of soils.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Oribatei; Collembola; Compaction; Subtropical region.
Ano: 1995 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751995000400018
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Interpretation of the stiffness and permeability of Sand-Kaolin mixtures in the framework of homogenization Anais da ABC (AABC)
Boutin,Claude; Kacprzak,Gregory; Doanh,Thiep.
This study deals with the behaviour of mixtures of sand and saturated kaolin paste considered as composite materials made of permeable and deformable (with non-linear behaviour) matrix (the kaolin paste) with rigid and impervious inclusions (the sand grains). Oedometric and permeability tests conducted on such mixtures highlight the key role of the state of the clay paste, and show the existence of a threshold of sand grain concentration above which a structuring effect influences both modulus and permeability. At the light of these experiments, the usual and tangent homogenization process (with simplifying assumptions to make the problem manageable) has been applied to estimate the mixture permeability and tangent compressibility. Qualitative and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Homogenization; Non-linear behaviour; Sand-clay mixtures; Permeability; Tangent modulus; Compaction; Hardening.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652010000100017
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Litter materials and the incidence of carcass lesions in broilers chickens Rev. Bras. Ciênc. Avic.
Garcia,RG; Almeida Paz,ICL; Caldara,FR; Nääs,IA; Bueno,LGF; Freitas,LW; Graciano,JD; Sim,S.
The aim of this study was to evaluate the effects of different litter materials on litter compaction, broiler feathering and the incidence of carcass lesions. In the experiment, 3240 one-day-old Ross® chicks were selected by sex and distributed according to a completely randomized experimental design in a 2 x 6 factorial arrangement (two sex and six litter materials). The following litter materials were used: wood shavings, rice husks, chopped Napier grass, 50% sugar cane bagasse plus 50% wood shavings, 50% sugar cane bagasse plus 50% rice husks, and pure sugar cane bagasse. Litter compaction was weekly assessed using a penetrometer. On days 21, 35 and 42 of the experimental period, feathering on the back and legs was scored according to a 0 - 10 scale. On...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Compaction; Fathering; Quality; Substrate.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2012000100005
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Modelling of soil penetration resistance for an oxisol under no-tillage Rev. Bras. Ciênc. Solo
Tavares Filho,João; Feltran,Clarissa Tieme Matsuda; Oliveira,José Francirlei de; Almeida,Edinei de.
Soil penetration resistance is an important property that affects root growth and elongation and water movement in the soil. Since no-till systems tend to increase organic matter in the soil, the purpose of this study was to evaluate the efficiency with which soil penetration resistance is estimated using a proposed model based on moisture content, density and organic matter content in an Oxisol containing 665, 221 and 114 g kg-1 of clay, silt and sand respectively under annual no-till cropping, located in Londrina, Paraná State, Brazil. Penetration resistance was evaluated at random locations continually from May 2008 to February 2011, using an impact penetrometer to obtain a total of 960 replications. For the measurements, soil was sampled at depths of 0...
Tipo: Info:eu-repo/semantics/article Palavras-chave: No-till; Compaction; Physical properties; Organic matter.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000100010
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Particle passage kinetics and neutral detergent fiber degradability of silage of pineapple waste (aerial parts) under different packing densities R. Bras. Zootec.
Caetano,Graciele Araújo de Oliveira; Villela,Severino Delmar Junqueira; Oliveira,Margarida Maria Nascimento Figueiredo de; Leonel,Fernando de Paula; Tamy,Wagner Pessanha.
The objective of this study was to determine the kinetics of in situ degradability parameters of the dry matter (DM) and neutral detergent fiber (NDF) and the passage of materials originating from the ensilage of the waste from pineapple cultivation (aerial parts). The four treatments utilized were silage of pineapple waste compacted at 600, 700, 900 and 1000 kg/m³. After ensiling the material from the pineapple cultivation, the particle-transit and rumen-degradation kinetics were analyzed. For the analysis of particle transit, chromium was utilized as a marker to mark the fiber. Passage rates were determined by retrieving the markers in the feces of the animals. In the degradation assay, samples were incubated in nylon bags for 0, 6, 18, 48 and 96 hours....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Compaction; Mean retention time in the rumen; Pineapple silage; Rumen fill.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014000100008
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Physical Properties of Soil Structures Identified by the Profil Cultural under Two Soil Management Systems Rev. Bras. Ciênc. Solo
Macedo,Sônia de Fátima Schilickmann; Grimaldi,Michel; Medina,Cristiane Conti; Cunha,José Edézio da; Guimarães,Maria de Fátima; Tavares Filho,João.
ABSTRACT Soil structure plays an important role in water retention, infiltration capacity, porosity, and penetration resistance. The aim of this study was to evaluate the unsaturated hydraulic conductivity and physical properties of Oxisol soils (bulk density and macro-, micro-, and total porosity) in the structures identified using the profil cultural method in areas under two different management practices (perennial pasture and sugarcane). Three pits were dug in each plot to find out how homogeneous morphological structural units (HMSU) were organized in the soil. Next, unsaturated hydraulic conductivity (Ki) was measured in situ inside each HMSU using a triple-ring infiltrometer at multiple suction. Six samples were collected (two samples for each kind...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil use; Compaction; Soil bulk density; Soil porosity.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100524
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Planosol soil sample size for computerized tomography measurement of physical parameters Scientia Agricola
Pedrotti,Alceu; Pauletto,Eloy Antonio; Crestana,Silvio; Cruvinel,Paulo Estevão; Vaz,Carlos Manoel Pedro; Naime,João de Mendonça; Silva,Alvaro Macedo da.
Computerized tomography (CT) is an important tool in Soil Science for noninvasive measurement of density and water content of soil samples. This work aims to describe the aspects of sample size adequacy for Planosol (Albaqualf) and to evaluate procedures for statistical analysis, using a CT scanner with a 241Am source. Density errors attributed to the equipment are 0.051 and 0.046 Mg m-3 for horizons A and B, respectively. The theoretical value for sample thickness for the Planosol, using this equipment, is 4.0 cm for the horizons A and B. The ideal thickness of samples is approximately 6.0 cm, being smaller for samples of the horizon B in relation to A. Alternatives for the improvement of the efficiency analysis and the reliability of the results obtained...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Lowland; Albaqualf; Bulk density; Compaction; Soil moisture.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000400019
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Pore system changes of damaged Brazilian oxisols and nitosols induced by wet-dry cycles as seen in 2-D micromorphologic image analysis Anais da ABC (AABC)
Pires,Luiz F.; Reichardt,Klaus; Cooper,Miguel; Cássaro,Fabio A.M.; Dias,Nivea M.P.; Bacchi,Osny O.S..
Soil pore structure characterization using 2-D image analysis constitutes a simple method to obtain essential information related to soil porosity and pore size distribution (PSD). Such information is important to infer on soil quality, which is related to soil structure and transport processes inside the soil. Most of the time soils are submitted to wetting and drying cycles (W-D), which can cause important changes in soils with damaged structures. This report uses 2-D image analysis to evaluate possible modifications induced by W-D cycles on the structure of damaged soil samples. Samples of three tropical soils (Geric Ferralsol, GF; Eutric Nitosol, EN; and Rhodic Ferralsol, RF) were submitted to three treatments: 0WD, the control treatment in which...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil bulk density; Soil water content; Soil porosity; Micromorphology; Soil structure; Compaction.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652009000100016
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Rate of soil egestion by larvae of Hylamorpha elegans (Burm.) and Phytoloema hermanni Germ. (Coleoptera: Scarabaeidae) Neotropical Entomology
Millas,Paz; Carrillo,Roberto.
Larvae of Hylamorpha elegans (Burm.) and Phytoloema herrmanni Germ. feed on roots, although many Scarabaeidae species are able to feed and survive on soil without living roots. In this study we evaluated the potential of H. elegans and P. herrmanni to ingest soil by estimating the rate of soil egestion. In the laboratory, the rate of soil egestion was determined from gut content and gut transit time of 3rd-instar larvae feeding on soil without roots. The soil egestion rate was 14-21 mg g-1 d-1 for H. elegans and 11-16 mg g-1 d-1 for P. herrmanni. The gut transit time (time of soil passage from mouth to anus) was 2-3 d for both species and the gut content was 41 ± 2 mg g-1 for H. elegans and 32 ± 2 mg g-1 for P. herrmanni. The quantitative importance of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ingest; Compaction; White grub.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2010000500004
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