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| Registros recuperados: 139 | |
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| Moraes,Moacir T. de; Debiasi,Henrique; Franchini,Julio C.; Silva,Vanderlei R. da. |
| Soil compaction caused by machinery traffic reduces crop yields. This study aimed to evaluate the effects of intensive traffic, and the soil water content, on the soil penetration resistance (PR) of a Rhodic Eutrudox (Distroferric Red Latosol, Brazilian Classification), managed under no-tillage (NT). The experiment consisted of six treatments: NT with recent chiseling, NT without additional compaction, and NT with additional compaction by 4, 8, 10 and 20 passes of a harvester with a weight of 100 kN (70 kN on the front axle). Undisturbed soil samples were collected at 5.5-10.5 cm and 13.5-18.5 cm depth to quantify the soil bulk density (BD). The PR was assessed in four periods, using an impact penetrometer, inserted in the soil to a depth of 46 cm. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil layers with mechanical impedance; No-tillage; Soil compaction; Soil consistency; Soil profile. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000400014 |
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| Arcoverde,Sálvio N. S.; Souza,Cristiano M. A. de; Cortez,Jorge W.; Maciak,Paulo A. G.; Suárez,Andrés H. T.. |
| ABSTRACT Machine traffic and conventional tillage can cause structural degradation of the soil, affecting the physical attributes and, consequently, the production and longevity of the sugarcane field. The objective of this study was to evaluate the production components of sugarcane cultivars (RB965902, RB985476, RB966928, RB855156, RB975201, RB975242, RB036066 and RB855536) and physical attributes of a Dystroferric Red Latosol (Oxisol) under no-tillage and reduced-tillage systems. The experiment was conducted using a completely randomized experimental design in an 8 × 2 factorial arrangement, with four replicates. The soil attributes evaluated were density, total porosity, macroporosity, microporosity and penetration resistance. The production components... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Saccharum spp.; Plant cane; Soil management; Reduced-tillage; No-tillage. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000200216 |
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| Cortez,Jorge W.; Armando,Egas J.; Motomiya,Anamari Viegas de A.; Rodrigues,Sonia A.; Gonçalves,Eduardo A.. |
| ABSTRACT The soil management system affects physical attributes, and the forward sowing speed can increase or decrease its results. Thus, this work aimed to evaluate management systems before and after soil mobilisation and forward sowing speed on soil physical attributes. Thus, an experiment was conduct in a completely randomized block design with four replications and six soil management systems: no tillage (NT), medium harrowing (MH), subsoiling operation (S), subsoiling and medium harrowing operations (S+MH), cross-subsoiling and medium harrowing (S+MH), and ploughing and two medium harrowing (P+2MH), and four forward sowing speeds: 3.1, 5.1, 5.8, and 7.9 km h−1, applied in the subplots. Soil management affects soil penetration resistance (PR) values,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Subsoiling; Conventional tillage; No-tillage. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000500607 |
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| Auler,André Carlos; Miara,Simone; Pires,Luiz Fernando; Fonseca,Adriel Ferreira da; Barth,Gabriel. |
| Anthropic action, such as the soil use and management systems, promote changes in the soil structure. These changes might hamper the development of plants in soil management practices that involve its mobilization, and the negative effects might be increased due to intensive use. The aim of this study was to evaluate the physico-hydrical properties of a Haplohumox in integrated production systems under different soil managements. The soil superficial (0.0-0.10 m) and sub-superficial (0.10-0.20 m) layers were evaluated in the different systems: conventional tillage (CT), minimum tillage (MT), no-tillage (NT) and chiseled no-tillage (CNT), taking into consideration the annual ryegrass cropped for different uses [cover crop (C), grazing (G) and silage (S)]... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Haplohumox; No-tillage; Soil physical quality; Crop-livestock integration; Agriculture sustainability. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000500013 |
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| Trentin, Robson Gonçalves; Modolo, Alcir José; Vargas, Thiago de Oliveira; Campos, José Ricardo da Rocha; Adami, Paulo Fernando; Baesso, Murilo Mesquita. |
| The heavy traffic of machines in no-tillage systems causes problems as soil compaction and loss of crops productivity. The objective of this paper is to evaluate the productivity of soybeans in reference to furrow openers and the levels of soil compaction in two crops. The experiment was conducted on Rhodic Hapludox by tracing random blocks with subdivided parcels. The soil bulk density levels were laid out in the parcels (1.16, 1.20, 1.22, and 1.26 Mg m-3) and the furrowers in the sub-parcels (double disc and shanks). The resistance to penetration, depth of the furrow, mobilized soil area, final plant stands, height of plants, mean number of beans by pod, 1,000 bean mass, number of pods per plant and productivity of the culture were evaluated. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: No-tillage; Seeder-fertilizer; Soil density.; Mecanização Agrícola. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/35015 |
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| Chioderoli,Carlos Alessandro; Mello,Luiz Malcom Mano de; Noronha,Rafael Henrique de Freitas; Pariz,Cristiano Magalhães; Lima,Ronaldo Cintra. |
| The Technologies setting at Agricultural production system have the main characteristics the vertical productivity, reduced costs, soil physical, chemical and biological improvement to promote production sustainable growth. Thus, the study aimed to determine the variability and the linear and special correlations between the plant and soil attributes in order to select and indicate good representation of soil physical quality for forage productivity. In the growing season of 2006, on the Fazenda Bonança in Pereira Barreto (SP), the productivity of autumn corn forage (FDM) in an irrigated no-tillage system and the soil physical properties were analyzed. The purpose was to study the variability and the linear and spatial correlations between the plant and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil physical properties; Soil management; Geostatistics; No-tillage; Forage crops. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000300008 |
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| Zwirtes,Anderson Luiz; Reinert,Dalvan José; Gubiani,Paulo Ivonir; Silva,Vanderlei Rodrigues Da; Mulazzani,Rodrigo Pivoto; Somavilla,André. |
| Abstract: The objective of this work was to evaluate the effect of different amounts of black oat (Avena strigosa) straw covering soil surface on soil temperature at different depths. The treatments consisted of 0, 3, 6, and 9 Mg ha-1 straw. Soil temperature was measured hourly by a thermocouple inserted at different depths (0, 5, 15, 30, and 50 cm) and was used to adjust an equation correlating the temperature of covered soil with that of bare soil. With the correlations, it was possible to observe a point value of temperature (inversion temperature of straw effect), below which the presence of straw acts positively on the maintenance of soil temperature and above which the presence of straw acts negatively on soil heating. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Avena strigosa; Inversion temperature; Mulch effect; No-tillage; Plant residue; Soil thermal regime. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017001101127 |
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| Guimarães,Rachel Muylaert Locks; Tormena,Cássio Antonio; Alves,Sérgio José; Fidalski,Jonez; Blainski,Éverton. |
| The crop-livestock system can promote soil compaction in surface layers, mainly due to animal trampling. However, plants and their root growth, in interaction with animal trampling, can decrease the deleterious changes in soil structure caused by this system. Up to the present time, the physical soil modifications in crop-livestock systems, including oat and ryegrass crops for winter animal forages are unknown. The objective of this study was to quantify and to relate tensile strength, friability and soil organic carbon in an Oxisol under a crop-livestock system. The study was conducted in Campo Mourão - Paraná, Brazil. Four forage heights were used for the winter forages: 7, 14, 21 and 28 cm. For each forage height, five soil blocks were randomly... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aggregate; Soil structure; No-tillage; Soil physical quality; Microstructure. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000400011 |
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| Seben Junior,Getulio de Freitas; Corá,José Eduardo; Lal,Rattan. |
| 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 organic carbon (SOC) content, SOC stock, water stable aggregates (WSA), geometric mean diameter (GMD), soil total porosity (TP), macroporosity (MA), and the least limiting water range (LLWR). However they increased soil bulk density (BD) and tensile strength (TS) of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: No-tillage; Soil organic carbon; Soil aggregate; Bulk density; Tropical soil; Cerrado. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000400021 |
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| Dorneles,Evelyn Penedo; Lisboa,Bruno Brito; Abichequer,André Dabdab; Bissani,Carlos Alberto; Meurer,Egon José; Vargas,Luciano Kayser. |
| Tillage and fertilization methods may affect soil fertility. With the aim of assessing changes in soil chemical properties over a period of ten years, soil samples of a Paleudult were collected over nine seasons at three layer depths (0-5, 5-10, 10-20 cm) and were chemically analyzed. Grain yield and nutrient export in two summer crops, soybean (Glycine max) and corn (Zea mays), in a field experiment set in Eldorado do Sul, in the state of Rio Grande do Sul, Brazil, were determined. Three soil tillage systems were evaluated, conventional (CT), reduced (RT) and no-tillage (NT), combined with mineral (lime and fertilizers) and organic (poultry litter) fertilization. The no-tillage system stood out as compared to the others, especially in the surface layer,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil fertility; Conventional tillage; No-tillage; Organic matter; Cation exchange capacity. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162015000200175 |
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| Tuchtenhagen,Ivana Kruger; Lima,Cláudia Liane Rodrigues de; Bamberg,Adilson Luís; Guimarães,Rachel Muylaert Locks; Mansonia,Pulido-Moncada. |
| 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 under native grassland, crop-livestock integration, no-tillage, and conventional management systems. Experimental areas with these different management systems were subjected to visual (VESS) and laboratory evaluation of the soil structure. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil degradation; Bulk density; Tensile strength; No-tillage; Conventional tillage. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100412 |
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| Schick,Jefferson; Bertol,Ildegardis; Barbosa,Fabrício Tondello; Miquelluti,David José; Cogo,Neroli Pedro. |
| 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 after tillage was negatively affected by the increase in soil tillage intensity. Soil losses were strongly affected by the management system, while water losses were less affected. Soil losses were 85.29, 6.41, 2.00, and 0.82 Mg ha-1 yr-1 in the BS, CT, MT, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil and water losses; No-tillage; Minimum tillage; Conventional tillage. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100525 |
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| Anjos,João Carlos Rocha dos; Andrade Júnior,Aderson Soares de; Bastos,Edson Alves; Noleto,Donavan Holanda; Melo,Francisco de Brito; Brito,Raimundo Rodrigues de. |
| Abstract: The objective of this work was to evaluate water storage in a Plinthaqualf under different straw levels during the fourth ratoon season of a sugarcane (Saccharum officinarum) crop. The study was conducted in the 2013/2014 crop season, with the cultivar SP-813250, at two soil depths (0.0-0.3 and 0.3-0.6 m), in a randomized complete block design, with five straw levels (0.0, 4.2, 9.5, 13.0, and 18.4 Mg ha-1) and four replicates. Soil moisture content was monitored with a time-domain reflectometer. The straw provided gains of up to 20 Mg ha-1 stems and kept increased water storage in the soil, in comparison with the soil without straw, in all evaluated periods. Maintenance of up to 50% (9.5 Mg ha-1) of sugarcane straw on soil surface promotes better... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Saccharum officinarum; No-tillage; Soil mulch; Water balance. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000600464 |
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| Freitas,Rômulo M. O. de; Dombroski,Jeferson L. D.; Freitas,Francisco C. L. de; Nogueira,Narjara W.; Leite,Tiago S.; Praxedes,Sidney C.. |
| ABSTRACT The resilience of crops to drought depends heavily on the cultural practices adopted, which can have a direct effect on water use efficiency. The aim of this study was to assess the influence of irrigation intervals on the growth, water consumption and water use efficiency of cowpea crops (cv. BRS Guariba) under conventional and no-tillage systems. The experiment was carried out in the semi-arid region of Rio Grande do Norte, Brazil, using a split-plot in a randomised complete block design, with four replications. Treatments consisted of two cultivation systems in the whole plots (conventional and no-tillage) and six irrigation intervals in the subplots (2, 6, 10, 14, 18 and 22 days) which were applied at full bloom. The biomass of the different... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vigna unguiculata; No-tillage; Mulch; Water deficit. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000400271 |
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| Balbinot Junior,Alvadi Antonio; Veiga,Milton da; Moraes,Anibal de; Pelissari,Adelino; Mafra,Álvaro Luiz; Piccolla,Cristiano Dela. |
| The objective of this work was to evaluate the effect of winter land use on the amount of residual straw, the physical soil properties and grain yields of maize, common bean and soybean summer crops cultivated in succession. The experiment was carried out in the North Plateau of Santa Catarina state, Brazil, from May 2006 to April 2010. Five strategies of land use in winter were evaluated: intercropping with black oat + ryegrass + vetch, without grazing and nitrogen (N) fertilization (intercropping cover); the same intercropping, with grazing and 100 kg ha-1 of N per year topdressing (pasture with N); the same intercropping, with grazing and without nitrogen fertilization (pasture without N); oilseed radish, without grazing and nitrogen fertilization... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Compaction; Cover crops; Crop-livestock integration; No-tillage; Organic carbon. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2011001000032 |
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| Registros recuperados: 139 | |
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