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| Registros recuperados: 97 | |
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| Maeda, Shizuo; Bognola, Itamar Antonio. |
| O efeito da aplicação combinada de calagem, fontes de fósforo e forma de aplicação das fontes no crescimento e absorção de fósforo em mudas de Eucalyptus dunnii foi estudado em condições de vaso. O experimento foi conduzido em casa-de-vegetação não climatizada, utilizando um Cambissolo Húmico Ta Alumínico Típico, durante 67 dias. Os tratamentos consistiram na combinação de dois níveis de calagem (C0, sem calagem e C1, dose para elevar o pH em água a 5,5 pelo método do pH SMP), duas fontes de fósforo (superfosfato triplo e fosfato natural de Gafsa) e dois modos de aplicação das fontes de fósforo (incorporada e localizada). A calagem aumentou a produção de matéria seca da parte aérea, o crescimento das mudas, o acúmulo e a eficiência de uso do P no... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fontes de fósforo; Calagem; Fertilidade do solo Phosphorus sources; Liming; Soil fertility. |
| Ano: 2011 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/302 |
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| Myyra, Sami; Pietola, Kyosti. |
| This article solves and characterizes optimal decision rules to invest in irreversible land improvements conditional on land tenure insecurity. Economic model is a normative dynamic programming model with known parameters for the one period returns and transition equations. The optimal decision rules for liming are solved numerically, conditional on alternative scenarios on the likelihood that the lease contract and, thus, farmer access to land is either renewed or expired. The model parameters represent Finnish soil quality and production conditions. The results suggest that irreversible liming decreases quickly and the yields decline gradually, when the farmer is confronted with land tenure insecurity caused by uncertain renewal of the lease contract.... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Land tenure; Liming; Land Economics/Use. |
| Ano: 2005 |
URL: http://purl.umn.edu/24418 |
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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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| Sá,Alessandra Aparecida de; Ernani,Paulo Roberto. |
| ABSTRACT Management of boron fertilization depends on the magnitude of B leaching in the soil profile, which varies proportionally with the concentration of B in the soil solution, which, in turn, decreases as the soil pH increases due to the higher sorption of B on soil solid surfaces. The objective of this study was to quantify the effect of liming and rates of B applied to the soil on B leaching. The experiment was carried out in the laboratory in 2012, and treatments consisted of a factorial combination of two rates of liming (without and with lime to raise the soil pH to 6.0) and five rates of B (0, 10, 20, 50 and 100 mg kg-1, as boric acid). A Typic Rhodudalf was used, containing 790 g kg-1 clay and 23 g kg-1 organic matter; the pH(H2O) was 4.6.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Acid soils; Liming; Boron fertilization; Percolation; Soil B. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100401 |
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| Ernani,P. R.; Nascimento,J. A. L.; Oliveira,L. C.. |
| Despite the fact that aluminum toxicity to crops is eliminated near soil water pH of 5.5, lime recommendation in many regions aims to increase soil pH up to 6.0 or even higher. For highly buffered soils, high rates of limestone are required to raise the pH from 5.5 to 6.0, resulting in additional, sometimes unnecessary, costs. The objective of this study was to evaluate the effect of soil pH on corn yield in a very acid Hapludox. The experiment was carried out in Lages, Southern Brazil, from 1992 to 1996. The soil had water pH of 4.7, Al3+ of 33 mmol c kg-1, O.M. of 45 g kg-1 and lime requirement to pH 6.0 of 9.0 t ha-1. Dolomitic limestone at rates of 0, 4.5, 9.0, 13.5 and 18.0 t ha-1 (equivalent to pure CaCO3) was incorporated into the soil down to 17 cm... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Liming; Corn; Silage; Acid soils; PH. |
| Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06831998000200013 |
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| Sandim,Aline da Silva; Büll,Leonardo Theodoro; Furim,Ariane Reis; Lima,Géssica da Silva; Garcia,Jader Luis Nantes. |
| Based on the assumption that silicate application can raise soil P availability for crops, the aim of this research was to compare the effect of silicate application on soil P desorption with that of liming, in evaluations based on two extractors and plant growth. The experiment was carried out in randomized blocks with four replications, in a 3 × 3 × 5 factorial design, in which three soil types, three P rates, and four soil acidity correctives were evaluated in 180 experimental plots. Trials were performed in a greenhouse using corn plants in 20-dm³ pots. Three P rates (0, 50 and 150 mg dm-3) were applied in the form of powder triple superphosphate and the soil was incubated for 90 days. After this period, soil samples were collected for routine chemical... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phosphorus adsorption; Silicate application; Liming; Silicon- phosphorus interaction. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000400018 |
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| Quaggio,J. A.; Gallo,P. B.; Owino-Gerroh,C.; Abreu,M. F.; Cantarella,H.. |
| Liming acid soils is considered to assure the availability of Mo in crops. Additionally, in peanuts (Arachis hypogaea L.) the positive response to liming is associated to a better supply of Ca+2, Mo for the nitrogenase-complex activity, and other non-nitrogen fixing activities of the crop. This study was thus undertaken to assess the effect of lime, Mo, and the lime-Mo interaction on peanut crop, on an acid Ultisol at the Mococa Experimental Station, Instituto Agronômico, São Paulo State, Brazil, from 1987 to 1990. A randomized complete block design with four replications, in a 4 x 4 factorial arrangement, was used in the study. The factors included four lime rates (0, 2, 4, and 6 t ha-1) broadcast and incorporated into the soil, and Mo (0, 100, 200, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Arachis hypogaea; Liming; Molybdenum; Nitrogen fixation. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832004000400008 |
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| Vieira,Renan Costa Beber; Fontoura,Sandra Mara Vieira; Bayer,Cimélio; Ernani,Paulo Roberto; Anghinoni,Ibanor; Moraes,Renato Paulo de. |
| ABSTRACT In no-tillage (NT) systems, there is no plowed layer since the soil is not tilled. Thus, the soil layer for fertility evaluation can be defined as the one in which the fertility indices are affected by the surface application of lime and fertilizers and soil properties have the closest relationship with crop yields. The objective of this study was to determine the most appropriate soil layer under long-term NT for sampling for fertility evaluation in the South-Central region of Paraná, Brazil. A total of 99 field experiments of crop rotations were performed, including soybean, corn, barley, wheat, and white oat, all on Oxisols (Hapludox). Despite the surface application, lime and fertilizers increased base saturation (V) and available K to a depth... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diagnostic layer; Liming; Fertilization; Soil sampling. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100542 |
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| Rodrigues,Donizetti Tomaz; Novais,Roberto Ferreira; Alvarez V,Víctor Hugo; Dias,José Maria Moreira; Villani,Ecila Mercês de Albuquerque. |
| In the best cultivation methods of orchids, in particular of the genus Phalaenopsis, liming is a common practice. The objective of this study was to evaluate the influence of lime rates (0.0; 1.0; 2.0; 3.0; 4.0; and 5.0 g dm-3 of substrate) applied to the cultivation substrate (xaxim) on the growth of Epidendrum ibaguense seedlings. In a greenhouse, 1-L plastic pots filled with 0.8 dm³ of xaxim were irrigated such that no leachate was lost during the experiment. N, P, K, Ca, Mg, S, Fe, Zn, B, and Mn contents in roots, stems and leaves were measured. Leachate was collected by applying a sufficient water volume to obtain 25 mL from each pot. Fourteen days after lime application of 3 g dm-3, the pH of the collected leachate reached values above 7 and a value... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Orchids; Nutrition; Liming; Floriculture. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000300021 |
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| Mutton,Márcia Justino Rossini; Garcia,Graciany; Teixeira,Vitor; Silva,Aline Ferreira; Costa,Gustavo Henrique Gravatim; Ferreira,Osania Emerenciano. |
| ABSTRACT Cachaça is the second most consumed alcoholic beverage in Brazil, obtained by distilling wine from fermented sugarcane must, and has an alcohol content of 38 to 48% (v/v) at 20 ºC. The quality of the drink is affected by the raw material used, the treatment of the juice, the type of yeast and the distillation process. The aim of this study was to evaluate the performance of two types of yeast (selected and pressed) and the prior physical and chemical treatment of the sugarcane juice on the quality of the cachaça. The experimental design was completely randomised with 9 replications. The primary treatment was represented by the must (obtained from clarified and non-clarified juice) and the secondary treatment by the types of yeast (CA-11 and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Quality beverage; Liming; Selected yeast; Saccharomyces cerevisiae; Fermentation process. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000400408 |
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| Registros recuperados: 97 | |
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