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Chiseling and gypsum application affecting soil physical attributes, root growth and soybean yield Rev. Ciênc. Agron.
Santos,Esmael Lopes dos; Debiasi,Henrique; Franchini,Julio Cezar; Vieira,Marcos José; Balbinot Junior,Alvadi Antonio.
ABSTRACT This study aimed to evaluate the effect of chiseling and gypsum application on soil physical properties, soybean root growth and grain yield. An experiment was carried out in Londrina, Paraná state, Brazil, under a randomized complete block design, with six replications. The soil in the experimental area is classified as a dystroferric Red Latosol (Oxisol), containing 720 g kg-1 of clay. The experiment comprised four treatments: (1) continuous no-tillage (CNT) system without gypsum application, (2) CNT with gypsum application at 3.5 Mg ha-1, (3) chiseled soil without gypsum, and (4) chiseled soil with gypsum application. Regardless of gypsum application, chiseling increased water infiltration rate in soil and reduced penetration resistance. Gypsum...
Tipo: Info:eu-repo/semantics/article Palavras-chave: No-tillage; Soil penetration resistance; Infiltration rate; Soil compaction.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902019000400536
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Effect of two-axle and three-axle sugarbeet tanker harvester on selected soil-physical properties in dry and wet soil conditions CIGR Journal
Moitzi, Gerhard; Amon, Stefan; Klik, Andreas; Schwen, Andreas.
The effects of two-axle and three-axle sugarbeet harvester under dry (gravimetric soil water content 20%) and wet (gravimentric soil water content 30%) soil conditions on bulk density, soil penetration resistance and saturated hydraulic conductivity were determined in a long-term non-ploughed field with a silty loam soil in the Pannonian region of Austria. The tyre-inflation pressure of the sugarbeet harvester was set to 140 kPa in the front axle and 190 kPa in the middle and rear axles. The total weight of the three-axle harvester was distributed equally with about 20 Mg each axle. Two-axle harvester distributed the total weight of 49.1 Mg to the rear axle with 27.3 Mg and to the front axle with 21.8 Mg.The differences of bulk density (10-15 cm, 25-30 cm,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agricultural Engineering; Soil Science sugarbeet tanker harvester; Soil moisture conditions; Bulk density; Soil penetration resistance; Saturated hydraulic conductivity.
Ano: 2019 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5083
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Improvement of a testing apparatus for dynamometry: procedures for penetrometry and influence of strain rate to quantify the tensile strength of soil aggregates Rev. Bras. Ciênc. Solo
Figueiredo,Getulio Coutinho; Silva,Alvaro Pires da; Tormena,Cássio Antonio; Giarola,Neyde Fabíola Balarezo; Moraes,Sergio Oliveira; Almeida,Brivaldo Gomes de.
Soil penetration resistance (PR) and the tensile strength of aggregates (TS) are commonly used to characterize the physical and structural conditions of agricultural soils. This study aimed to assess the functionality of a dynamometry apparatus by linear speed and position control automation of its mobile base to measure PR and TS. The proposed equipment was used for PR measurement in undisturbed samples of a clayey "Nitossolo Vermelho eutroférrico" (Kandiudalfic Eutrudox) under rubber trees sampled in two positions (within and between rows). These samples were also used to measure the volumetric soil water content and bulk density, and determine the soil resistance to penetration curve (SRPC). The TS was measured in a sandy loam "Latossolo Vermelho...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil compaction; Soil physical quality; Tensile stress; Soil penetration resistance.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000200008
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Physical properties of a rhodic haplustox under two sugarcane harvesting systems Rev. Bras. Ciênc. Solo
Machado,Walquíria; Telles,Tiago Santos; Tavares Filho,João; Guimarães,Maria de Fátima; Alves,Grace Bungenstab; Borges,José Luiz Bernardo.
This study had the purpose of evaluating the effects of two management types of sugarcane: harvesting of burnt cane (BCH) and mechanized harvesting of unburnt green cane (MCH), on some soil physical properties of a dystrophic Rhodic Haplustox. The data were then compared with results for the same soil type under native forest. A completely randomized design was used, with three treatments and 20 replications. The following characteristics were determined: organic matter, aggregate stability, soil bulk density, and porosity at depths of 0-0.20 m and soil penetration resistance. After 15 years of cultivation, there were some alterations in the soil under cane burnt before harvesting, evidenced by a drop in the weighted average diameter of stable aggregates...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Saccharum officinarum; Soil bulk density; Porosity; Soil penetration resistance; Soil aggregate stability.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000600004
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Soil compaction and eucalyptus growth in response to forwarder traffic intensity and load Rev. Bras. Ciênc. Solo
Silva,Sérgio Ricardo da; Barros,Nairam Félix de; Costa,Liovando Marciano da; Leite,Fernando Palha.
During timber exploitation in forest stands harvesting machines pass repeatedly along the same track and can cause soil compaction, which leads to soil erosion and restricted tree root growth. The level of soil compaction depends on the number of passes and weight of the wood load. This paper aimed to evaluate soil compaction and eucalyptus growth as affected by the number of passes and wood load of a forwarder. The study was carried out in Santa Maria de Itabira county, Minas Gerais State - Brazil, on a seven-year-old eucalyptus stand planted on an Oxisol. The trees were felled by chainsaw and manually removed. Plots of 144 m² (four rows 12 m long in a 3 x 2 m spacing) were then marked off for the conduction of two trials. The first tested the traffic...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil bulk density; Water-stable aggregates; Soil penetration resistance; Porosity; Soil organic carbon; Infiltration.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832008000300002
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Soil physical properties under a 'Tanzânia' grass pasture fertilized with mineral nitrogen or intercropped with stylosanthes PAB
Ferreira,Camila Jorge Bernabé; Tormena,Cássio Antonio; Cecato,Ulysses; Franco,Hélio Henrique Soares; Moreira,Wagner Henrique; Galbeiro,Sandra; Ribeiro,Ossival Lolato.
Abstract: The objective of this work was to evaluate the physical properties of a soil with a 'Tanzânia' grass (Megathyrsus maximus) pasture fertilized with mineral nitrogen or intercropped with the legume 'Campo Grande' (Stylosanthes spp.), and subjected to continuous grazing and variable stocking rate, in a three-year chronosequence. The treatments were: 'Tanzânia' grass and Stylosanthes; and 'Tanzânia' grass fertilized with 75, 150, and 225 kg ha-1 N per year. The experiment was carried out in an Oxisol, in a randomized complete block design with three replicates, in split plots divided according to time (first, second, and third experimental years). The following soil properties were assessed annually: soil bulk density, porosity in the soil macropore...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Panicum maximum; Stylosanthes; Soil penetration resistance; Stocking rate.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000400478
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SOYBEAN AGRONOMIC PERFORMANCE AND SOIL PHYSICAL ATTRIBUTES UNDER TRACTOR TRAFFIC INTENSITIES REA
Arcoverde,Sálvio N. S.; Souza,Cristiano M. A. de; Rafull,Leidy Z. L.; Cortez,Jorge W.; Orlando,Roberto C..
ABSTRACT Machinery traffic intensification has been recurrent in intensive agriculture in annual crops, which may lead to structural soil degradation and, consequently, a reduction of its productive capacity. Therefore, this study aimed to assess the influence of tractor traffic intensification on soil physical attributes and soybean yield components. The study was performed in an Oxisol under no-tillage for 10 years, using a randomized block design with five tractor traffic intensities (0, 2, 4, 6, 8, and 12 passes) and five replications. Density, porosity, macroporosity, microporosity, and penetration resistance were assessed in the soil and stem diameter, number of pods per plant, number of grains per pod, grain weight per plant, thousand-grain weight,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil compaction; Yield components; Shoot; Soil penetration resistance; Machinery traffic.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000100113
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Structural changes in latosols of the cerrado region: I - relationships between soil physical properties and least limiting water range Rev. Bras. Ciênc. Solo
Severiano,Eduardo da Costa; Oliveira,Geraldo César de; Dias Júnior,Moacir de Souza; Costa,Katia Aparecida de Pinho; Silva,Fabiano Guimarães; Ferreira Filho,Silvio Marcos.
The agricultural potential of Latosols of the Brazilian Cerrado region is high, but when intensively cultivated under inappropriate management systems, the porosity can be seriously reduced, leading to rapid soil degradation. Consequently, accelerated erosion and sedimentation of springs and creeks have been observed. Therefore, the objective of this study was to evaluate structural changes of Latosols in Rio Verde, Goiás, based on the Least Limiting Water Range (LLWR), and relationships between LLWR and other physical properties. Soil samples were collected from the B horizons of five oxidic Latosols representing the textural variability of the Latosols of the Cerrado biome. LLWR and other soil physical properties were determined at various soil...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil compaction; Degradation of agricultural soils; Soil penetration resistance; Water availability; Soil texture.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000300013
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Structural quality of soils cultivated with coffee and pasture in an environmental protection area Rev. Bras. Ciênc. Solo
Lima,Vico Mendes Pereira; Magalhães,Ciro Augusto de Souza; Oliveira,Geraldo César de; Lima,José Maria de.
Studies of soils in Environmental Protection Areas (EPAs) are of great importance, because they are an essential component of ecosystems, directly interfering in environmental sustainability. The objective of this study was to evaluate the structural quality of soil cultivated with coffee and used as pasture in the Capituva's River microbasin, which is located in the Environmental Protection Area in Coqueiral, south of the state of Minas Gerais. Uniaxial compression test (preconsolidation test) and soil resistance to penetration were used. Undisturbed samples were taken from the surface layer (0-5 cm) of the soils in the area: a typic dystrophic Red Latosol (LVd - Oxisol), a typic eutrophic Red Argisol (PVe - Ultisol), and a typic dystrophic Haplic...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Compression; Environmental sustainability; Soil water availability; Load support capacity; Soil penetration resistance.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000300012
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Variabilidade espacial da resistência à penetração no perfil do solo sob semeadura direta e preparo convencional. Infoteca-e
SANTOS JÚNIOR, J. de D. G. dos; SÁ, M. A. C. de; HURTADO, S. M. C.; REIN, T. A.; SHIRATSUCHI, L. S..
bitstream/CPAC-2010/30249/1/bolpd-208.pdf
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) Palavras-chave: Solo; Resistência; Soil; Soil penetration resistance.
Ano: 2008 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/571869
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