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Chemical and physical-hydric characterisation of a red latosol after five years of management during the summer between-crop season Rev. Bras. Ciênc. Solo
Silva,José Fausto Guimarães; Severiano,Eduardo da Costa; Costa,Kátia Aparecida de Pinho; Benites,Vinícius de Melo; Guimarães Júnnyor,Wellingthon da Silva; Bento,José Carlos.
Agricultural production systems that include the production of mulch for no-tillage farming and structural improvement of the soil can be considered key measures for agricultural activity in the Cerrado region without causing environmental degradation. In this respect, our work aimed to evaluate the chemical and physical-hydric properties of a dystrophic Red Latosol (Oxisol) in the municipality of Rio Verde, Goias, Brazil, under different soil management systems in the between-crop season of soybean cultivation five years after first planting. The following conditions were evaluated: Brachiaria brizantha cv. Marandu as a cover crop during the between-crop season; Second crop of maize intercropped with Brachiaria ruziziensis; Second crop of grain alone in a...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Brachiaria; Crop succession; No-tillage; Least limiting water range; Water availability.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000500023
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Controlled traffic and soil physical quality of an Oxisol under sugarcane cultivation Scientia Agricola
Souza,Gustavo Soares de; Souza,Zigomar Menezes de; Cooper,Miguel; Tormena,Cássio Antônio.
Machinery traffic in sugarcane (Saccharumsp.) plantations reduces soil physical quality, and hinders both root development and crop yield. We evaluated the physical quality of an Oxisol and the development of sugarcane roots under controlled traffic. The treatments assessed were: without controlled machinery traffic (WCT), controlled traffic by adjusting the tractor and infield wagons to a 3.0 m track width with the operator guiding the machinery (CT1) and the previous treatment using real time kinematic / global positioning system (RTK / GPS) precision auto steer (CT2). Soil samples were collected from the planting rows, seedbed and inter-row center to determine the least limiting water range (LLWR) and soil porosity from scanned 2-D images. The root dry...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Least limiting water range; Soil compaction; Machinery traffic; Root system.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162015000300270
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Effect of cropping systems in no-till farming on the quality of a Brazilian Oxisol Rev. Bras. Ciênc. Solo
Seben Junior,Getulio de Freitas; Corá,José Eduardo; Lal,Rattan.
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 (Zea mays L.) (CC), soybean/soybean (Glycine max L. Merryll) (SS), and soybean-corn (SC); and seven winter crops - corn, sunflower (Helianthus annuus L.), oilseed radish (Raphanus sativus L.), pearl millet (Pennisetum americanum (L.)...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cerrado; Crop rotation; Winter crops; Soil aggregates; Least limiting water range; Bulk density.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000400023
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Hydrophysical Quality of an Oxisol and Sugarcane Yield in Chisel Plow-Based Sugarcane Ratoon Management Rev. Bras. Ciênc. Solo
Garbiate,Marcos Vinicius; Vitorino,Antonio Carlos Tadeu; Prado,Eber Augusto Ferreira do; Mauad,Munir; Pellin,Douglas Martins Pereira.
ABSTRACT Mechanical harvesting has increasingly been used in sugarcane production units, and it has often resulted in reduced structural quality of the soil due to soil compaction caused by machine traffic. Thus, sugarcane ratoon crops have often been chiseled to overcome such a problem. The aim of the current study is to assess some physical properties of a Latossolo Vermelho Distroférrico (Rhodic Hapludox) that was chiseled after the third harvest in a sugarcane ratoon crop. The study was conducted in a commercial crop area throughout the 2011/2012 crop year. A randomized block experimental design was used, with five replications. The treatments consisted of five chiseling operations in sugarcane ratoon crops, namely: T1 - single-shank ripper with...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Least limiting water range; Load-bearing capacity; Pre-compacting pressure; Water behavior.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100530
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Is Structural Quality as Assessed by the "Profil Cultural" Method Related to Quantitative Indicators of Soil Physical Quality? Rev. Bras. Ciênc. Solo
Watanabe,Rafaela; Tormena,Cássio Antonio; Guimarães,Maria de Fátima; Tavares Filho,João; Ralisch,Ricardo; Franchini,Julio; Debiasi,Henrique.
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), and soil air permeability (Ka) under different soil and crop management systems. The study was developed in a long-term experiment (24 years) involving two systems of soil management (no-tillage and conventional tillage) and two...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Least limiting water range; Air permeability; No-tillage; Conventional tillage.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100510
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Least limiting water range, S-index and compressibility of a Udalf under different management systems. Repositório Alice
LIMA, C. L. R. de; DUPONT, P. B.; PILLON, C. N.; MIOLA, E. C. C..
Agricultural areas in the region of Turuçu, on the Southeast Hillside in the state of Rio Grande do Sul (RS), Brazil present many examples of soil physical degradation. Accord-ingly, strategies aimed at evaluating and ameliorating the structural quality of soils should be developed to ensure the sustainable use of these areas. This study aimed to evaluate the least limiting water range (LLWR), S-index, compressibility parameters, organic carbon and the organic matter granulometric fractions of a Udalf under different agricultural uses. Soil samples with disturbed and non-disturbed structure from the 0.00 to 0.10 m layer were collected on farms in the Southeast Hillside, Turuçu region, RS, for analyzing soil under: i) conventional system of corn after...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Faixa de água menos limitante; Least limiting water range; LLWR; Solo; Física do Solo.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1118599
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Minipenetrômetro dinâmico para determinação da resistência à penetração em amostras de solo indeformadas Repositório Alice
SÁ, M.A.C. de; SANTOS JUNIOR, J. de D.G. dos; RESCK, D.V.S.; FERREIRA, E.A.B.; FRANZ, C.A.B..
O objetivo deste trabalho foi descrever e testar um minipenetrômetro dinâmico para a determinação da resistência do solo à penetração, em amostras indeformadas. Foram construídas quatro peças de diferentes massas, para a mensuração da resistência à penetração em solos com conteúdos variáveis de água. Para o teste, foram utilizadas amostras de um Latossolo Vermelho, sob sistemas de plantio convencional e direto. Avaliaram-se o índice de cone, a densidade do solo e os conteúdos gravimétrico e volumétrico de água do solo. O equipamento avaliado é confiável, preciso, de baixo custo e tem potencial para promover mais estudos sobre intervalo hídrico ótimo do solo.
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Intervalo hídrico ótimo; Índice de cone; Qualidade física do solo; Least limiting water range; Cone index; Soil physical quality.
Ano: 2007 URL: http://www.alice.cnptia.embrapa.br/handle/doc/122837
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Physical quality of an Oxisol cultivated with maize submited to cover crops in the pre-cropping period Rev. Bras. Ciênc. Solo
Pereira,Fabiana de Souza; Andrioli,Itamar; Beutler,Amauri Nelson; Almeida,Cinara Xavier de; Pereira,Faber de Souza.
The intensive use of land alters the distribution of the pore size which imparts consequences on the soil physical quality. The Least Limiting Water Range (LLWR) allows for the visualization of the effects of management systems upon either the improvement or the degradation of the soil physical quality. The objective of this study was to evaluate the physical quality of a Red Latosol (Oxisol) submited to cover crops in the period prior to the maize crop in a no-tillage and conventional tillage system, using porosity, soil bulk density and the LLWR as attributes. The treatments were: conventional tillage (CT) and a no-tillage system with the following cover crops: sunn hemp (Crotalaria juncea L.) (NS), pearl millet (Pennisetum americanum (L.) Leeke) (NP)...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Management systems; Physical attributes; Least limiting water range.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000100021
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Physical quality of soils under a crop-livestock-forest system in the cerrado/amazon transition region. Repositório Alice
MOREIRA, G. M.; NEVES, J. C. L.; ROCHA, G. C.; MAGALHÃES, C. A. de S.; FARIAS NETO, A. L. de; MENEGUCI, J. L. P.; FERNANDES, R. B. A..
EN: Integrated crop-livestock-forest (iCLF) systems have gained prominence in the past decades as an alternative of sustainable land use, particularly in regions in which there is pressure against agricultural expansion in protected ecosystems such as the Brazilian Amazon. In this context, the objective of this study is to evaluate the effects of one year of use of the iCLF system in the Cerrado/Amazon transition region to determine its impact on soil quality compared to other traditional land uses in the region (planted forest, crop, forage, and native forest). The results indicated that the iCLF system did not jeopardize the soil physical quality, and only the crop land use affected the soil physical attributes. The land uses with the lowest impact on...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Integrated crop-livestock-forest system; Least limiting water range; Agrosilvopastoral system.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1100018
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Soil Chemical and Physical Properties on an Inceptisol after Liming (Surface and Incorporated) Associated with Gypsum Application Rev. Bras. Ciênc. Solo
Bortolanza,Delcio Rudinei; Klein,Vilson Antonio.
ABSTRACT Inceptsoils have high aluminum contents, and amendments are required to ensure a satisfactory crop development. Liming is efficient in neutralizing Al3+, but when applied to the topsoil its action is restricted to the surface layers, and sometimes lime incorporation into the soil is recommendable. However, tillage may negatively alter physical soil properties. Thus, gypsum could be an alternative to increase Ca2+ levels and reduce Al saturation in deeper layers, without requiring tillage. An experiment was initiated in 2010, to assess chemical and physical soil properties. Soil samples were collected in February 2013. A random block design with sub-subplots and two replications was used. Lime was applied to the surface of the main plot (0, 8 and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Al saturation; Soil water retention; Least limiting water range.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100527
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SWEET SORGHUM PERFORMANCE AFFECTED BY SOIL COMPACTION AND SOWING TIME AS A SECOND CROP IN THE BRAZILIAN CERRADO Rev. Bras. Ciênc. Solo
Júnnyor,Wellingthon da Silva Guimarães; Severiano,Eduardo da Costa; Silva,Alessandro Guerra da; Gonçalves,Wainer Gomes; Andrade,Renata; Martins,Brendow Roberto Rodrigues; Custódio,Guilherme Dias.
ABSTRACT Increasing attention has recently been given to sweet sorghum as a renewable raw material for ethanol production, mainly because its cultivation can be fully mechanized. However, the intensive use of agricultural machinery causes soil structural degradation, especially when performed under inadequate conditions of soil moisture. The aims of this study were to evaluate the physical quality of aLatossolo Vermelho Distroférrico (Oxisol) under compaction and its components on sweet sorghum yield forsecond cropsowing in the Brazilian Cerrado (Brazilian tropical savanna). The experiment was conducted in a randomized block design, in a split plot arrangement, with four replications. Five levels of soil compaction were tested from the passing of a tractor...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Sorghum bicolor (L.); Sowing time; Soil structure; Water limitation; Least limiting water range; Agroenergy.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000601744
Registros recuperados: 11
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