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| Registros recuperados: 28 | |
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| Morales Rivera, Aurelio. |
| Se estudió la variabilidad en rendimiento de semilla y sus componentes, y producción de biomasa aérea en un grupo de variedades de frijol de color negro, nativas del sur de Veracruz y un grupo del tipo “Flor de Mayo”, introducidas del Altiplano, y la región central de México, en condiciones de acidez edáfica y sequía terminal en el Municipio de Juan Rodríguez Clara, Veracruz, en el ciclo otoño-invierno 2012-13. Se incluyeron ocho variedades comerciales liberadas por el INIFAP, un criollo de Michoacán, México, tres variedades criollas con testa de color negro y Negro Michigan. Se utilizó un diseño de bloques completos al azar con cuatro repeticiones; la unidad experimental consistió de cinco surcos de 5 m de longitud y 0.8 m de ancho. Se aplicó una dosis de... |
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Palavras-chave: Phaseolus vulgaris L.; Acidez; Sequía; Rendimiento de semilla; Soil acidity; Drought; Seed yield; Genética; Maestría. |
| Ano: 2014 |
URL: http://hdl.handle.net/10521/2225 |
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| Yagi,Renato. |
| Abstract: The objective of this work was to evaluate the residual effects of occasional soil tillage in a 17-year-old, no-tillage system, associated with liming and nitrogen fertilization, on the crop yields and chemical properties of a very clayey Oxisol in the South of Brazil. A randomized complete block design in split-split plots was used, with two soil managements (with or without plowing), two liming treatments (with or without the required dose to raise base saturation to 70%), five N doses applied on side-dress (0, 1, 2, 4, and 6 times the recommended amounts), and four replicates. A rotation system was used with corn and soybean in the summer, and with wheat and black oats in the winter. The residual effects of occasional soil tillage in a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Consolidated no-tillage system; Soil acidity; Soil management; Soil organic matter; Superficial liming; Water deficit. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000700833 |
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| Nava,Gilberto; Santos,Karine Louise dos; Costa,Murilo Dalla; Ciotta,Marlise Nara. |
| Abstract: The objective of this work was to investigate the effect of liming and phosphorus fertilization on the growth, mineral composition of the leaves, fruit yield, and mycorrhizal colonization of young feijoa (Acca sellowiana) plants. Treatments consisted of four liming levels - 0, 25, 50, and 100% of the dose required to raise the soil pH to 6.5 - and of five levels of P - 0, 60, 120, 180, and 240 kg ha-1 P2O5 -, placed in a randomized complete block design, in a split-plot arrangement, with three replicates. The orchard was established in 2010 with the Helena cultivar. In 2012, 2013, and 2014, plant growth was evaluated by measuring trunk perimeter, plant height, and tree canopy width. Mineral composition of the leaves, regarding P, N, K, Ca, and Mg... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Acca sellowiana; Mineral nutrition; Mycorrhizal colonization; Nutritional status; Phosphorus fertilization; Soil acidity. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2016000800942 |
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| Petter,Fabiano André; Madari,Beáta Emöke; Silva,Mellissa Ananias Soler da; Carneiro,Marco Aurélio Carbone; Carvalho,Márcia Thaís de Melo; Marimon Júnior,Ben Hur; Pacheco,Leandro Pereira. |
| The objective of this work was to evaluate the effect of biochar made from Eucalyptus on soil fertility, and on the yield and development of upland rice. The experiment was performed during two years in a randomized block design with four replicates, in a sandy loam Dystric Plinthosol. Four doses of NPK 05-25-15, annually distributed in stripes (0, 100, 200 and 300 kg ha-1), and four doses of biochar (0, 8, 16 and 32 Mg ha-1), applied once in the first year - alone or with NPK - were evaluated. In the first year, biochar positively affected soil fertility [total organic carbon (TOC), Ca, P, Al, H+Al, and pH], at 0-10 cm soil depth, and it was the only factor with significant effect on yield. In the second year, the effect of biochar diminished or was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biochar; Macronutrients; Plant biomass; Plant growth; Soil acidity; Rice yield. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012000500010 |
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| Santanna,Maria Alice; Kaminski,João; Rheinheimer,Danilo dos Santos; Toledo,Jaderson dos Anjos; Casali,Carlos Alberto. |
| Despite the efficiency of the Shoemaker, McLean, Pratt (SMP) buffer method in estimating soil acidity, the presence of p-nitrophenol and potassium chromate in the solution, both hazardous substances, has caused increasing environmental concerns. The purpose of this study was to test Sikora method (Sikora, 2006) as an alternative to the adapted SMP buffer method, generally used to estimate potential acidity of Southern Brazilian soils. For the test, 21 soils in the South and Cerrado regions of Brazil were sampled. (1) The potential acidity values of these soils range from 35.95 to 4.02 cmol c kg-1 of soil, reflecting a wide acidity variation. The Sikora buffer does not mimic the adapted SMP buffer used in Southern Brazil, since the former has a low ability... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil acidity; Liming; Hazardous chemicals. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000500025 |
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| Pinheiro,Gabriela Lúcia; Silva,Carlos Alberto; Lima,José Maria de. |
| The application of organic residues to the soil can increase soluble organic carbon (SOC) and affect the pH and electrolytic conductivity (EC) of the soil. However, the magnitude of these changes depends on the type of residue and the applied dose. This study aimed to evaluate the effect of increasing C rates contained in organic residue on the pH, EC, water-extractable total carbon (WETC), water-extractable organic carbon (WEOC), and water-extractable inorganic carbon (WEIC) in soil treated with manure (chicken, swine, and quail), sawdust, coffee husk, and sewage sludge. The levels of total C (TC- KH2PO4), organic carbon (OC- KH2PO4), and inorganic C (IC- KH2PO4) extractable by a 0.1 mol L-1 KH2PO4 solution were also quantified in soil under the effect of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soluble organic carbon; Manure; Electrolytic conductivity; Soil acidity; Crop residues; Carbon adsorption. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000300012 |
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| Piedade,Tales de Campos; Melo,Vander de Freitas; Souza,Luiz Cláudio de Paula; Dieckow,Jeferson. |
| The graphical representation of spatial soil properties in a digital environment is complex because it requires a conversion of data collected in a discrete form onto a continuous surface. The objective of this study was to apply three-dimension techniques of interpolation and visualization on soil texture and fertility properties and establish relationships with pedogenetic factors and processes in a slope area. The GRASS Geographic Information System was used to generate three-dimensional models and ParaView software to visualize soil volumes. Samples of the A, AB, BA, and B horizons were collected in a regular 122-point grid in an area of 13 ha, in Pinhais, PR, in southern Brazil. Geoprocessing and graphic computing techniques were effective in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Geoprocessing; GRASS GIS; ParaView; Confined soil volume; Soil acidity. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000400005 |
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| Martins,Vanessa; Silva,Douglas Ramos Guelfi; Marchi,Giuliano; Leite,Maurício Cunha Almeida; Martins,Éder de Souza; Gonçalves,Ana Stella Freire; Guilherme,Luiz Roberto Guimarães. |
| The current high price of potassium chloride and the dependence of Brazil on imported materials to supply the domestic demand call for studies evaluating the efficiency of alternative sources of nutrients. The aim of this work was to evaluate the effect of silicate rock powder and a manganese mining by-product, and secondary materials originated from these two materials, on soil chemical properties and on brachiaria production. This greenhouse experiment was conducted in pots with 5 kg of soil (Latossolo Vermelho-Amarelo distrófico - Oxisol). The alternative nutrient sources were: verdete, verdete treated with NH4OH, phonolite, ultramafic rock, mining waste and the proportion of 75 % of these K fertilizers and 25 % lime. Mixtures containing 25 % of lime... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil acidity; Nutrient availability; Rock powder; Multi-nutrient fertilizer. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000100194 |
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| Corrêa,Márcio Cleber de Medeiros; Natale,William; Prado,Renato de Mello; Banzatto,David Ariovaldo; Queiroz,Ronialison Fernandes; Silva,Marcos Antonio Camacho da. |
| ABSTRACT Several complications can arise, either directly or indirectly, from implementation of measures to correct soil acidity in established fruit orchards, such as impaired roots, lower root volume, risk of plant infection, propagation of diseases, promotion of pest development (especially nematodes), and soil disaggregation and compaction. These factors can have a negative effect on crop yield. Therefore, it becomes critical to implement an effective method of neutralizing soil acidity, especially at the level of the tree roots. To assess the effect that the rates and forms of limestone applied on the soil surface have on soil fertility and on nutrition and yield of guava, an experiment was conducted in a commercial orchard. A randomized block... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil acidity; Limestone; Perennial crop; Fruticulture; Psidium guajava.. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100522 |
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| Silva,Ivo Ribeiro da; Corrêa,Tarcísio Fernando Côrtes; Novais,Roberto Ferreira; Gebrim,Fabrício de Oliveira; Nunes,Flancer Novais; Silva,Eulene Francisco da; Smyth,Thomas Jot. |
| A large proportion of soybean fields in Brazil are currently cultivated in the Cerrado region, where the area planted with this crop is growing considerably every year. Soybean cultivation in acid soils is also increasing worldwide. Since the levels of toxic aluminum (Al) in these acid soils is usually high it is important to understand how cations can reduce Al rhizotoxicity in soybean. In the present study we evaluated the ameliorative effect of nine divalent cations (Ca, Mg, Mn, Sr, Sn, Cu, Zn, Co and Ba) in solution culture on Al rhizotoxicity in soybean. The growth benefit of Ca and Mg to plants in an acid Inceptisol was also evaluated. In this experiment soil exchangeable Ca:Mg ratios were adjusted to reach 10 and 60 % base saturation, controlled by... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Heavy metals; Cation amelioration; Soil acidity; Ca:Mg ratio. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832008000500027 |
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| Silva,Ivo Ribeiro; Corrêa,Tarcísio Fernando Cortes; Novais,Roberto Ferreira; Smyth,T. Jot; Rufty,Thomas; Silva,Eulene Francisco; Gebrim,Fabrício Oliveira; Nunes,Flancer Novais. |
| The protective effect of cations, especially Ca and Mg, against aluminum (Al) rhizotoxicity has been extensively investigated in the last decades. The mechanisms by which the process occurs are however only beginning to be elucidated. Six experiments were carried out here to characterize the protective effect of Mg application in relation to timing, location and crop specificity: Experiment 1 - Protective effect of Mg compared to Ca; Experiment 2 - Protective effect of Mg on distinct root classes of 15 soybean genotypes; Experiment 3 - Effect of timing of Mg supply on the response of soybean cvs. to Al; Experiment 4 - Investigating whether the Mg protective effect is apoplastic or simplastic using a split-root system; Experiment 5 - Protective effect of Mg... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soybean; Cations; Calcium; Rhizotoxicity; Soil acidity. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832009000100007 |
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| Pereira,Lilian Elgalise Techio; Passos,Bruna Scalia de Araújo; Herling,Valdo Rodrigues; Luz,Pedro Henrique de Cerqueira; Avanzi,Junior Cesar. |
| ABSTRACT Changes in morphological composition and in the plant population were evaluated during late spring, summer and autumn, in swards of Brachiaria decumbens cv. Basilisk in response to liming (C0.0, without liming; C0.7, limestone amount equivalent to 0.7 ton ha-1; and C1.0, limestone amount equivalent to 1.0 ton ha-1), which were subjected to severe or lenient cutting (40 or 60% of the pre-cutting height, respectively). Increased limestone doses did not result in higher herbage mass (HM), leaf area index (LAI) or proportion of leaves (%L) in the pre-harvest. However, lower proportion of dead material was registered in C0.7 treatment. The treatments C0.0 e C0.7 had higher %L during late spring and summer when associated to severe cutting regimes... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil acidity; Canopy height; Management strategies. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902018000400673 |
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| Cherubin,Maurício Roberto; Santi,Antônio Luis; Eitelwein,Mateus Tonini; Da Ros,Clovis Orlando; Bisognin,Mateus Bortoluzi. |
| Knowledge of spatial variability is an important factor to be considered in planning a program of soil sampling and crop management under precision agriculture (PA). In this context, the aim of this work was to evaluate the efficiency of the dimensions of sampling grids used in the state of Rio Grande do Sul (RS), Brazil to characterise the spatial variability of the attributes pHwater, base saturation (V%), calcium (Ca) and magnesium (Mg) levels. The study was carried out on 30 agricultural sites located in the northern region of RS, having soils classified as Oxisols and managed using the tools of PA. The dimensions of the grids under study were: 100 x 100 m (10 areas), 142 x 142 m (10 areas) and 173 x 173 m (10 areas). Soil was collected at a depth of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil acidity; Precision Agriculture; Soil sampling; Geostatistics. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000400004 |
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| Silva,Hernani Alves da; Moraes,Anibal de; Carvalho,Paulo César de Faccio; Fonseca,Adriel Ferreira da; Caires,Eduardo Fávero; Dias,Carlos Tadeu dos Santos. |
| Although integrated crop-livestock system (ICLS) under no-tillage (NT) is an attractive practice for intensify agricultural production, little regional information is available on the effects of animal grazing and trampling, particularly dairy heifers, on the soil chemical and physical attributes. The objective of this study was to evaluate the effects of animal grazing on the chemical and physical attributes of the soil after 21 months of ICLS under NT in a succession of annual winter pastures (2008), soybeans (2008/2009), annual winter pastures (2009), and maize (2009/10). The experiment was performed in the municipality of Castro (PR) in a dystrophic Humic Rhodic Hapludox with a clay texture. The treatments included a combination of two pasture (annual... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Tropical soil; Integrated production system; Conservationist agricultural; Soil acidity. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000500010 |
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| Fonseca,Adriel Ferreira da; Caires,Eduardo Fávero; Barth,Gabriel. |
| Micronutrient availability can be affected by the increase of the soil pH due to surface liming. A field trial was carried out on a loamy, kaolinitic, thermic Typic Hapludox at Ponta Grossa, Paraná State, Brazil. The main objective was to evaluate the effects of surface liming and re-liming on the availability of micronutrients [copper (Cu), iron (Fe), manganese (Mn), and zinc (Zn)] for wheat (Triticum aestivum L.) cropped under a no-till system. A randomized complete block design was used in a split-plot arrangement. The main plots received surface lime applications (2, 4, and 6 Mg ha-1) in July 1993. In the subplots, surface lime (3 Mg ha-1) was applied again in June 2000. In 2003, before the wheat sowing, soil samples were taken at 0-5, 5-10, and 10-20... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Triticum aestivum L; Soil acidity; Dolomitic lime; Multinutrient extractants; Soil with variable charge. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162010000100009 |
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| Caires,Eduardo Fávero; Churka,Susana; Garbuio,Fernando José; Ferrari,Roseli Aparecida; Morgano,Marcelo Antonio. |
| Effects of lime and gypsum applications on the quality of soybeans grown under no-till (NT) are not well defined yet. A field trial established in 1998 on a dystrophic clayey Rhodic Hapludox, at Ponta Grossa, State of Paraná, Brazil, evaluated grain yield and soybean quality based on oil, protein and nutrient content, after lime and gypsum applications under NT, in a randomized complete block design (n = 3), split-plot experiment. In the main plots, the treatments with dolomitic lime were: control (no lime), split application of lime on the surface (three yearly applications of 1.5 Mg ha¹), surface lime (4.5 Mg ha¹), and incorporated lime (4.5 Mg ha¹). Subplots received four different rates of gypsum: 0, 3, 6, and 9 Mg ha-1. The soybean crop was evaluated... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine max (L.) Merrill; Soil acidity; Oil; Protein; Nutrient. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162006000400008 |
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| Registros recuperados: 28 | |
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