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| Registros recuperados: 32 | |
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| Leão,Marisol G. A. de; Marques Júnior,José; Souza,Zigomar M. de; Siqueira,Diego S.; Pereira,Gener T.. |
| The technique of precision agriculture and soil-landscape allows delimiting areas for localized management, allowing a localized application of agricultural inputs and thereby may contribute to preservation of natural resources. Therefore, the objective of this work was to characterize the spatial variability of chemical properties and clay content in the context of soil-landscape relationship in a Latosol (Oxisol) under cultivation of citrus. Soil samples were collected at a depth of 0.0-0.2 m in an area of 83.5 ha planted with citrus, as a 50-m intervals grid, with 129 points in concave terrain and 206 points in flat terrain, totaling 335 points. Values for the variables that express the chemical characteristics and clay content of soil properties were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Geostatistics; Management zone; Oxisol; Orange. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162011000400003 |
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| SPERA, S. T.; REATTO, A.; MARTINS, E. de S.; FARIAS, M. F. R.; SILVA, A. V. da. |
| RESUMO: A área da bacia hidrográfica do Ribeirão Taguatinga (Área de Relevante Interesse Ecológico Juscelino Kubitschek - ARIE JK), no Distrito Federal, tem superfície de 77,50 km2. As principais classes de solos que ocorrem nessa área são: Latossolos, Argissolos, Cambissolos, Gleissolos, Plintossolos, Neossolos Fúvicos e Neossolos Quartzarênicos cujas principais características químicas, físicas e morfológicas estão apresentadas neste trabalho com o objetivo de subsidiar projetos de desenvolvimento e assentamentos locais. Em realação à aptidão agrícola, os Latossolos são classificados como 2(b)c, 2c e 3(c) e os Argissolos como 2(b)c. Os Cambissolos como 5(n) e 6. Os Gleissolos são classificados como 3(b)c, 3(c) e 5(n), enquanto os Plintossolos apresentam... |
| Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) |
Palavras-chave: Mapeamento; Plintossolo; Gleissolo; Plinthic soil.; Aptidão Agrícola; Cambissolo; Classificação do Solo; Cerrado; Latossolo; Oxisol; Uso da Terra.; Solo; Inceptisols; Brazil; Land suitability; Land use; Soil surveys.; Soil classification; Soil. |
| Ano: 2004 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/569094 |
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| Barberena,Iara Magalhães; Espindula,Marcelo Curitiba; Araújo,Larissa Fatarelli Bento de; Marcolan,Alaerto Luiz. |
| Abstract: The objective of this work was to evaluate urease inhibitors for the reduction of ammonia volatilization in Amazonian soils. The work was carried out on a clayey yellow Oxisol, a clayey red Oxisol, and on a light silty Ultisol. Each experiment was conducted in split plots, using standard urea, urea + a benzimidazole-type urease inhibitor (BZI1), urea + a benzoylthiourea-type urease inhibitor (RTB68), urea + N-(n-butyl) triamide thiophosphate (NBPT), or a fertilizer-free control. Volatilized ammonia was collected at 48, 96, 144, 192, 240, 288, 336, and 384 hours after fertilization. Ammonia volatilization reached a maximum at 144 hours in the urea, urea + benzimidazole, and urea + benzoylthiourea treatments. A peak level was reached at 192 and 288... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Benzimidazole; Benzoylthiourea; Oxisol; Plinthosol; Urease inhibitors. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000103800 |
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| Oliveira,Maurílio Fernandes de; Prates,Hélio Teixeira; Santanna,Derli Prudente; Oliveira Júnior,Rubem Silvério de. |
| The objective of this work was to study the sorption and desorption of imazaquin, in surface and subsurface soil samples from Brazil. Sorption and desorption steps were carried out using batch equilibration and high performance liquid chromatography analytical routines. The value of Kf,ads was positively correlated with clay content, and negatively correlated with pH of supernatant. Samples from Typic Haplustox, clayey soil profile having high clay content, provided higher Kf,ads values, and negative correlation with organic carbon, silt content, cation exchange capacity and pH. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Retention; Desorption; Oxisol; Sustainability. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2006000300013 |
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| Alves,Ray Pinheiro; Couto Junior,Antonio Felipe; Martins,Eder de Souza; Nardoto,Gabriela Bielefeld. |
| Abstract The objective of this work was to evaluate the effect of soil carbon on landscape functioning of the Oxisols covering the plateaus of the Alto São Bartolomeu watershed, in the Cerrado (Brazilian savanna) region of Central Brazil. Soil organic carbon (SOC) concentration, carbon stocks, and some soil physical and chemical characteristics were determined at the 0-0.20-m depth on native and anthropogenic areas. Soils from cerrado stricto sensu patches were similar both physically and chemically, being affected by exchangeable Al3+ and by SOC concentrations, while anthropogenic matrices were affected by soil bulk density, pH, extractable P, and exchangeable Ca2+ and Mg2+. The estimate of spatial distribution of soil carbon better fitted had an adjusted... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brazilian savanna; No-tillage; Oxisol; Pasture; Pedotransfer function; Vegetation indices. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2016000901241 |
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| Silva,Edson Cabral da; Muraoka,Takashi; Franzini,Vinícius Ide; Villanueva,Felipe Carlos Alvarez; Buzetti,Salatiér; Moreti,Dolorice. |
| The objective of this work was to evaluate the utilization by corn plants of P from triple superphosphate fertilizer labeled with 32P (32P‑TSP), and of P from soil as affected by N rates and by the green manures (GM) sunn hemp (Crotalaria juncea) and millet (Pennisetum glaucum). The experiment was carried out using pots filled with 5 kg Oxisol (Rhodic Hapludox). A completely randomized design was used, in a 4x4x2 factorial arrangement, with four replicates. The treatments were: four P rates as TSP (0, 0.175, 0.350, and 0.700 g P per pot); four N rates as urea (0, 0.75, 1.50, and 2.25 g N per pot); and sunn hemp or millet as green manure. The additions of N and P by the GM were taken into account. After grain physiologic maturation, corn dry matter, P... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; Cover crop; Isotopic dilution; Oxisol; Radioisotope; Urea. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012000800016 |
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| Jayme-Oliveira,Adilson; Ribeiro Júnior,Walter Quadros; Ramos,Maria Lucrécia Gerosa; Ziviani,Adley Camargo; Jakelaitis,Adriano. |
| Abstract: The objective of this work was to evaluate the growth dynamics of the cover plants amaranth (Amaranthus cruentus), quinoa (Chenopodium quinoa), and millet (Pennisetum glaucum) in a Typic Acrustox, under different water regimes in the Brazilian Cerrado. The cultivation was carried out in the winter, with reduced rainfall, which facilitated the application of varying irrigation depths to the different crops. Water regimes denominated lower, lower middle, upper middle, and upper - corresponding to 217, 386, 563, and 647 mm water depths, respectively - were tested by means of an irrigation bar composed of sprinklers with different flow rates. Plant growth was quantified by weekly collections. Amaranth was the most responsive plant to water. Quinoa... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amaranthus cruentus; Chenopodium quinoa; Pennisetum glaucum; Oxisol; Water stress.. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000800561 |
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| BATISTÃO,A.C.; YAMASHITA,O.M.; SILVA,I.V.; ARAÚJO,C.F.; LAVEZO,A.. |
| ABSTRACT: Contamination by herbicides with a prolonged effect on the soil can cause anatomical changes in sensitive plants. Thus, this study aimed at verifying the anatomical changes of tomato stem and leaves caused by different concentrations of picloram in two classes of soil from the Amazon region. The study was developed at UNEMAT, Alta Floresta - Mato Grosso state, in a CRD, in a 2 x 5 factorial arrangement, with four replications. A clayey Rhodic Hapludox (LVAw) and a sandy clay loam Typic Ustipsamments (RQo) were contaminated with 0, 1, 2, 3, and 4 L ha-1 of Tordon®, leaving the soil exposed to weathering. One-hundred and twenty days after the application of the herbicide, 10 tomato seeds were sown in samples of both soils. Thirty days after sowing,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Leaf blade; Synthetic auxin; Oxisol; Entisol; Tomato. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100303 |
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| Corrêa,Rodrigo Studart; Silva,Douglas José da. |
| ABSTRACT Biosolids have been produced by various stabilization processes of sewage sludge, but little attention has been given to the effects of such treatments on their effectiveness to supply nitrogen for plant growth. Here, we investigated these effects by cultivating Lolium perenne (ryegrass) in two Australian soils, a sandy Spodosol and a clayey Oxisol. Biosolids stabilized by either aerobic digestion, composting, CaO-liming, 250 oC heat-drying or solar irradiation of domestic sewage sludge were applied to soils at 10 increasing rates (0.25-8.0 dry Mg ha-1), and chemically fertilized soils were used as reference. Results showed that the stabilization processes affected biosolids-N agronomic rates and effectiveness to yield plant biomass, which was a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sewage sludge; Organic-N; Plant nutrients; Oxisol; Spodosol. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100523 |
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| Moraes,Moacir Tuzzin de; Debiasi,Henrique; Franchini,Julio Cezar; Silva,Vanderlei Rodrigues da. |
| The soil penetration resistance is an important indicator of soil compaction and is strongly influenced by soil water content. The objective of this study was to develop mathematical models to normalize soil penetration resistance (SPR), using a reference value of gravimetric soil water content (U). For this purpose, SPR was determined with an impact penetrometer, in an experiment on a Dystroferric Red Latossol (Rhodic Eutrudox), at six levels of soil compaction, induced by mechanical chiseling and additional compaction by the traffic of a harvester (four, eight, 10, and 20 passes); in addition to a control treatment under no-tillage, without chiseling or additional compaction. To broaden the range of U values, SPR was evaluated in different periods.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pedotransfer functions; Oxisol; Impact penetrometer; Soil compaction. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000600004 |
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| Silva,Bruno Montoani; Silva,Érika Andressa da; Oliveira,Geraldo César de; Ferreira,Mozart Martins; Serafim,Milson Evaldo. |
| The plant-available water capacity of the soil is defined as the water content between field capacity and wilting point, and has wide practical application in planning the land use. In a representative profile of the Cerrado Oxisol, methods for estimating the wilting point were studied and compared, using a WP4-T psychrometer and Richards chamber for undisturbed and disturbed samples. In addition, the field capacity was estimated by the water content at 6, 10, 33 kPa and by the inflection point of the water retention curve, calculated by the van Genuchten and cubic polynomial models. We found that the field capacity moisture determined at the inflection point was higher than by the other methods, and that even at the inflection point the estimates... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Field capacity; Permanent wilting point; Soil water retention curve modeling; Oxisol; Land use planning. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000200011 |
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| Wadt,Paulo Guilherme Salvador. |
| Farm planning requires an assessment of the soil class. Research suggest that the Diagnosis and Recommendation Integrated System (DRIS) has the capacity to evaluate the nutritional status of coffee plantations, regardless of environmental conditions. Additionally, the use of DRIS could reduce the costs for farm planning. This study evaluated the relationship between the soil class and nutritional status of coffee plants (Coffea canephora Pierre) using the Critical Level (CL) and DRIS methods, based on two multivariate statistical methods (discriminant and multidimensional scaling analyses). During three consecutive years, yield and foliar concentration of nutrients (N, P, K, Ca, Mg, S, B, Zn, Mn, Fe and Cu) were obtained from coffee plantations cultivated... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: DRIS; Critical level; Plant nutrition; Nutritional diagnosis; Soil classification; Oxisol; Coffea canephora. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832005000200008 |
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| Marchi,Giuliano; Guilherme,Luiz Roberto Guimarães; Chang,Andrew C.; Nascimento,Clístenes Williams Araújo do. |
| Few investigations have been carried out about the comparison of desorption rate and amount of heavy metals extracted successively by organic acid mixtures mimicking the rhizosphere and routine extractants in sewage sludge-amended soils. Extractions of Zn, Cd, Ni, Cr, and Cu were performed in samples of a sewage sludge-amended soil using seven extractants: four organic acid mixtures and three routine extractants (DTPA, Mehlich-I, and ammonium acetate). Results from single pass extractions, in which the extractable metal contents were determined by simply extracting the soil a single time, as well as from 15 successive extractions, in which the solid residues of the first extraction was successively extracted 14 additional times, of heavy metals were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oxisol; Extraction rate; Trace elements. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000500009 |
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| Registros recuperados: 32 | |
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