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Registros recuperados: 48
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Relação entre acidez e características químicas, físicas e mineralógicas de solos sob pastagem na região do cerrado. Infoteca-e
VENDRAME, P. R. S.; BRITO, O. R.; GUIMARÃES, M. D. F.; MARTINS, E. D. S.; BECQUER, T..
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E) Palavras-chave: Fertilidade do solo; Acidez do solo; Química do solo; Mineralogia; Cerrado; Soil fertility; Soil pH; Soil chemistry; Mineralogy.
URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/562777
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Short-term effects of byproduct amendments and lime on physicochemical and microbiological properties of acidic soil from Jiaodong Peninsula of China Ciência Rural
Shen,Yuwen; Lin,Haitao; Song,Xiaozong; Liu,Ping; Bo,Luji; Chen,Jianqiu; Yang,Li.
ABSTRACT: The influences of byproduct amendments, containing silicon, calcium, magnesium and potassium, on acidic soil quality in Jiaodong Peninsula of China had been studied and compared with that of lime through monitoring physicochemical properties and enzyme activities of acidic soil over a 120-day period. Byproduct amendments (1125, 2250, 4500 and 9000 kg ha-1) and lime 2250 kg ha-1 was applied in the acidic soil. Results showed that both byproduct amendments and lime significantly increased the pH, EC and enzyme activities of soil. The by-product amendments inhibited microbial biomass carbon and soil respiration. Nevertheless, the lime-treated soil had a much more higher level of CO2 emission than the by-product amendments-treated soil. Compared to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil amendments; Soil pH; Soil respiration; Enzyme activity.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000600252
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Soil structural properties under addition of crop residues and limestone. Repositório Alice
LEMAINSKI, J.; DENARDIN, J. E.; DONAGEMMA, G. K..
Soil structure depends on physical, chemical, and biological factors. The interaction of these factors is a result of quantity and quality of residues and other inputs added to the soil, as well as their physicochemical conditions. Liming is an essential management practice in acid soils. When in excess, liming alters the electrolytic solution of the soil with impacts on its structure. In this sense, negative charges increase with pH, reducing the attraction between clay particles and resulting in increased clay dispersion and soil aggregate destabilization.
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Oxisol; Argila; Ph; Plantio Direto; Oxisols; Clay; Soil pH; No-tillage.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1115017
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Solubility of Heavy Metals/Metalloid on Multi-Metal Contaminated Soil Samples from a Gold Ore Processing Area: Effects of Humic Substances Rev. Bras. Ciênc. Solo
Boechat,Cácio Luiz; Pistóia,Vítor Caçula; Ludtke,Ana Cristina; Gianello,Clesio; Camargo,Flávio Anastácio de Oliveira.
ABSTRACT Bioavailability of heavy metals at contaminated sites is largely controlled by the physicochemical properties of the environmental media such as dissolved organic matter, hydroxides and clay colloids, pH, soil cation exchange capacity and oxidation-reduction potential. The aim of this study was to investigate soil pH and heavy metal solubility effect by levels of humic and fulvic acids applied in soil samples with different levels of contamination by heavy metals. The soil samples used in this study were collected in a known metal-contaminated site. Humic acid (HA) and fulvic acid (FA) were purchased as a commercially available liquid material extracted from Leonardite. The experiment was carried out in a factorial scheme of 4 × (4 + 1), with four...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil pH; Bioavailable metal; Humic acid; Fulvic acids; Metal leaching.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100528
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Spatial variability on soil pH gradient: a case study in vineyards. Repositório Alice
SCANNAVINO JUNIOR, F. A.; PEREZ-KUROKI, A. J.; GHOBAKHLOU, A.; SALLIS, P.; SHANMUGANATHAN, S.; CRUVINEL, P. E..
bitstream/item/194485/1/Spatial-variability-on-soil-pH-gradient.pdf
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Vinhedos; PH do solo; Variabilidade espacial; Mapas geoestatísticos; Spatial variability; Geostatistical maps; Vineyards; Soil pH.
Ano: 2011 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/918635
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Sunflower tolerance to aluminum. Repositório Alice
CASTRO, C. de; MORAES, L. A. C.; OLIVEIRA JUNIOR, A. de; LEITE, R. M. V. B. C.; OLIVEIRA, F. A. de; RODAK, B. W..
Sunflower is very sensitive to soil acidity and, in general, cannot tolerate Al saturation greater than 5%. Under these conditions, root growth is drastically affected reducing the ability of plants to explore larger soil volume, which consequently may block water and nutrient absorption. The aim of this study was to evaluate the tolerance of sunflower genotypes to four aluminum concentrations. An experiment was carried out at the Seed Laboratory of Embrapa Soja. Seeds of ten sunflower genotypes (Pioneer 6510, CF 101, Embrapa 122, BRS 323, BRS 322, V 70004, SYN 045, BRS G 32, HLA 211 CL and Catissol) were put directly on germination paper moistened with four doses of aluminum (0, 0.4, 0.8 and 1.2 mg dm-3 Al), using Al2(SO4)3.18H2O. Ten seeds were used for...
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Girassol; Acidez do solo; Solo ácido; Helianthus annuus; Soil pH.
Ano: 2012 URL: http://www.alice.cnptia.embrapa.br/handle/doc/921143
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The leaching of trifloxysulfuron-sodium and pyrithiobac-sodium in soil columns as a function of soil liming - doi: 10.4025/actasciagron.v35i2.16349 Agronomy
Guerra, Naiara; Universidade Estadual de Maringá-UEM; Oliveira Júnior, Rubem Silvério de; Universidade Estadual de Maringá - UEM; Constantin, Jamil; Universidade Estadual de Maringá - UEM; Oliveira Neto, Antonio Mendes de; Universidade Estadual de Maringá - UEM; Dan, Hugo de Almeida; Universidade Estadual de Maringá - UEM; Braz, Guilherme Braga Pereira; Universidade Estadual de Maringá - UEM.
Scarce research has been published concerning the effect of soil pH on the leaching potential of herbicides in tropical soils. Thus, we designed this study to evaluate the influence of soil liming on the leaching of trifloxysulfuron-sodium and pyrithiobac-sodium after simulated rainfall depths in soil columns. In the study, two trials were conducted simultaneously; the first experiment evaluated trifloxysulfuron-sodium (7.5 g ha-1), while the second experiment evaluated pyrithiobac-sodium (70 g ha-1). Both experiments were conducted in a randomized block design with a 2 x 4 x 5 factorial scheme and four replications. The design’s factors corresponded to 2 soil liming conditions (with or without liming), 4 simulated rainfall depths (0, 15, 30, and 45 mm)...
Palavras-chave: ALS inhibitors; Mobility; Soil pH; Tropical soils.
Ano: 2013 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/16349
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Zinc availability for corn grown on an oxisol amended with flue dust Scientia Agricola
Santos,Gláucia Cecília Gabrielli dos; Berton,Ronaldo Severiano; Camargo,Otávio Antônio de; Abreu,Mônica Ferreira de.
The costs related to the construction and maintenance of industrial landfills, and the environmental risks that they may represent, have increased the interest of several types of industries in studying the possibility of applying residues to agricultural soils. This study evaluates the efficiency of flue dust as a zinc source for corn, and the zinc availability for corn evaluated by four methods. A greenhouse experiment carried out at Campinas, SP, Brazil, evaluated the effect of two zinc sources (flue dust and zinc sulphate), at three rates (5, 50 and 150 mg dm-3), in one soil (Rhodic Hapludox) under two pH conditions (5.0 and 6.0). The treatments were arranged in a randomized factorial scheme design with three replications. Zinc availability indexes...
Tipo: Info:eu-repo/semantics/article Palavras-chave: DTPA; Heavy metals; Industrial wastes; Speciation; Soil pH.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162006000600008
Registros recuperados: 48
Primeira ... 123 ... Última
 

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