Consulta: subjectFacets:"Soil organic carbon"
Registros recuperados: 33
Data/hora: 04/06/2024 12:24:33

Pastoralism.
Provedor de dados: 14
Autores: KHALIL, M. I.; CORDOVIL, C. M. D. S.; FRANCAVIGLIA, R.; HENRY, B.; KLUMPP, K.; KONCZ, P.; LLORENTE, M.; MADARI, B. E.; MUÑOZ-ROJAS, M.; RAINER, N.
1. Description of the livelihood. 2. Range of applicability. 3. Impacts on soil organic carbon stocks. 4. Other benefits of the practice. 5. Potential drawbacks to the practice. 6. Recommendations before implementing the practice. 7. Potential barriers for adoption.
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Conservação do Solo; Grassland soils; Soil organic carbon.
Ano: 2021
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1137239

The role of agriculture in mitigating greenhouse gas emissions.
Provedor de dados: 14
Autores: MADARI, B. E.; CUADRA, S. V.; OLIVEIRA, P. P. A.; HIGA, R. C. V.; RAMOS, N. P.; ANDRADE, C. A. de; KEMENES, A.; GONDIM, R. S.
Introduction. Agriculture and livestock. Energy crops. Forestry sector. Ecological systems. Fish farming. Final considerations.
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Mitigação de emissão de gases do efeito estufa; Agricultura; Efeito Estufa; Carbono; Mudança Climática; Agriculture; Greenhouse gas emissions; Global warming; Climate change; Soil organic carbon; Carbon sequestration.
Ano: 2020
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1128223

Determinação dos teores de carbono orgânico em solos do Acre com diferentes procedimentos analíticos.
Provedor de dados: 14
Autores: SILVA, L. M. da; RODRIGUES, M. de J. M.; TAVARES, O. C. H.; SANTOS, O. A. Q. dos; WADT, P. G. S.; PEREIRA, M. G.
Os teores de carbono orgânico total (COT) no solo podem ser determinados por técnicas que se baseiam tanto na combustão por via úmida quanto por via seca. No entanto, a primeira apresenta-se como uma técnica demorada, porém, largamente utilizado nos laboratórios brasileiros para análise de solos. O objetivo da presente pesquisa é analisar os teores de carbono orgânico de solos do Acre submetidos à diferentes procedimentos analíticos. As amostras foram submetidas a diferentes condições de tratamento sendo aquecidas e não aquecidas, maceradas e não maceradas, bem como variar a concentração do titulante, sendo empregadas seis diferentes formas de determinação do carbono. Verificou-se que todos os métodos empregados apresentaram alta e significativa correlação...
Tipo: Folhetos
Palavras-chave: Carbono orgânico; Métodos analíticos; Formação Solimões; Acre; Amazônia Ocidental; Western Amazon; Química do Solo; Matéria Orgânica; Soil organic carbon; Soil chemistry; Soil organic matter; Analytical methods.
Ano: 2021
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1136679

Improved pasture management.
Provedor de dados: 14
Autores: KHALIL, M. I.; CORDOVIL, C. M. D. S.; FRANCAVIGLIA, R.; HENRY, B.; KLUMPP, K.; KONCZ, P.; LLORENTE, M.; MADARI, B. E.; MUÑOZ-ROJAS, M.; RAINER, N.
1. Description of the practice. 2. Range of applicability. 3. Impacts on soil organic carbon stocks. 4. Other benefits of the practice. 5. Potential drawbacks to the practice. 6. Recommendations before implementing the practice. 7. Potential barriers for adoption.
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Conservação do Solo; Grassland soils; Soil organic carbon; Pasture management.
Ano: 2021
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1137235

Conservation of permanent grassland.
Provedor de dados: 14
Autores: KHALIL, M. I.; CORDOVIL, C. M. D. S.; FRANCAVIGLIA, R.; HENRY, B.; KLUMPP, K.; KONCZ, P.; LLORENTE, M.; MADARI, B. E.; MUÑOZ-ROJAS, M.; RAINER, N.
1. Description of the practice. 2. Range of applicability. 3. Impacts on soil organic carbon stocks. 4. Other benefits of the practice. 5. Potential drawbacks to the practice. 6. Recommendations before implementing the practice. 7. Potential barriers for adoption.
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Conservação do Solo; Grassland soils; Soil organic carbon.
Ano: 2021
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1137226

Grassland diversification.
Provedor de dados: 14
Autores: KHALIL, M. I.; CORDOVIL, C. M. D. S.; FRANCAVIGLIA, R.; HENRY, B.; KLUMPP, K.; KONCZ, P.; LLORENTE, M.; MADARI, B. E.; MUÑOZ-ROJAS, M.; RAINER, N.
1. Description of the practice. 2. Range of applicability. 3. Impacts on soil organic carbon stocks. 4. Other benefits of the practice. 5. Potential drawbacks to the practice. 6. Recommendations before implementing the practice. 7. Potential barriers for adoption.
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Conservação do Solo; Grassland soils; Soil organic carbon.
Ano: 2021
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1137230

Conversion of cropland to grassland.
Provedor de dados: 14
Autores: KHALIL, M. I.; CORDOVIL, C. M. D. S.; FRANCAVIGLIA, R.; HENRY, B.; KLUMPP, K.; KONCZ, P.; LLORENTE, M.; MADARI, B. E.; MUÑOZ-ROJAS, M.; RAINER, N.
1. Description of the practice. 2. Range of applicability. 3. Impacts on soil organic carbon stocks. 4. Other benefits of the practice. 5. Potential drawbacks to the practice. 6. Recommendations before implementing the practice. 7. Potential barriers for adoption.
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Conservação do Solo; Grassland soils; Soil organic carbon.
Ano: 2021
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1137233

Grazing exclusion and rotational grazing.
Provedor de dados: 14
Autores: KHALIL, M. I.; CORDOVIL, C. M. D. S.; FRANCAVIGLIA, R.; HENRY, B.; KLUMPP, K.; KONCZ, P.; LLORENTE, M.; MADARI, B. E.; MUÑOZ-ROJAS, M.; RAINER, N.
1. Description of the practice. 2. Range of applicability. 3. Impacts on soil organic carbon stocks. 4. Other benefits of the practice. 5. Potential drawbacks to the practice. 6. Recommendations before implementing the practice. 7. Potential barriers for adoption.
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Conservação do Solo; Grassland soils; Soil organic carbon.
Ano: 2021
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1137236

Liming acidic soils.
Provedor de dados: 14
Autores: MACHADO, P. L. O. de A.; BENITES, V. de M.; BOLAN, N.
1. Description of the practice. 2. Range of applicability. 3. Impact on soil organic carbon stocks. 4. Other benefits of the practice. 5. Potential drawbacks to the practice. 6. Recommendations before implementing the practice. 7. Potential barriers for adoption.
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Solo Ácido; Acid soils; Liming; Soil organic carbon; Soil properties; Climate change; Greenhouse gas emissions.
Ano: 2021
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1137163

Restoration of degraded grassland.
Provedor de dados: 14
Autores: KHALIL, M. I.; CORDOVIL, C. M. D. S.; FRANCAVIGLIA, R.; HENRY, B.; KLUMPP, K.; KONCZ, P.; LLORENTE, M.; MADARI, B. E.; MUÑOZ-ROJAS, M.; RAINER, N.
1. Description of the practice. 2. Range of applicability. 3. Impacts on soil organic carbon stocks. 4. Other benefits of the practice. 5. Potential drawbacks to the practice. 6. Recommendations before implementing the practice. 7. Potential barriers for adoption.
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Conservação do Solo; Grassland soils; Soil organic carbon.
Ano: 2021
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1137232

Life cycle inventory-based assessment of greenhouse gas emissions from arable-land farming systems in the Tokachi region of Hokkaido, northern Japan
Provedor de dados: 19
Autores: Koga, N.
2006年8月3日とかちプラザ・レインボーホールで開催､日本ユネスコ国内委員会主催の帯広農村開発教育国際セミナー(OASERD)国際連合ユネスコアジア太平洋地域教育開発計画事業(APEID)シンポジウム｢地球にやさしい農畜産業をめざして : 温室効果ガスの発生と制御」講演資料
Palavras-chave: Arable land; Fuel consumption; Greenhouse gas; Life cycle inventory; Soil organic carbon.
Ano: 2006
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/1893

Physical quality of an Oxisol under no-tillage subjected to different cropping systems
Provedor de dados: 86
Autores: Seben Junior,Getulio de Freitas; Corá,José Eduardo; Lal,Rattan.
Abstract The objective of this work was to evaluate the physical quality of an Oxisol under no-tillage subjected to different crop rotations and crop sequences. The experiment was carried out in a clayey Oxisol, during six years, in a randomized complete block design, with strip plots and three replicates. The following physical indicators of soil quality were evaluated: soil density and carbon content, as well as mean weight diameter and tensile strength of aggregates. Treatments consisted of three summer crop rotations - corn/corn (Zea mays), soybean/soybean (Glycine max), and soybean/corn - and of seven second crops (crop sequences) - corn, sunflower (Helianthus annuus), oilseed radish (Raphanus sativus), pearl millet (Pennisetum americanum), pigeon pea...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carbon sequestration; Crop rotation; Diameter of aggregates; Soil density; Soil organic carbon; Tensile strength.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2016000901568

Sustainability of Corn Stover Harvest for Biomass
Provedor de dados: 31
Autores: Sesmero,   Juan P.
Off-farm demand for crop residues is expected to grow as bioenergy policies become effective. Demand for residues will provide farmers with an additional source of revenue but it may also trigger losses in soil organic carbon and increases in fertilizer application. This study develops a dynamic economic model of stover harvest that permits conceptualization and quantification of these potential tradeoffs. We parameterize our model based on publicly available studies of soil biophysical relationships in the Corn Belt. Under these parameter values and 2010 corn and fertilizer prices harvesting stover is not economically convenient at prices below $53 per dry ton of stover. Results suggest that the rate of stover harvest may be quite sensitive and negatively...
Tipo: Conference Paper or Presentation
Palavras-chave: Stover supply; Biomass; Soil productivity; Soil organic carbon; Nitrogen; Environmental Economics and Policy; Farm Management; Land Economics/Use; Resource /Energy Economics and Policy; C61; Q12; Q24; Q42; Q53.
Ano: 2011
URL: http://purl.umn.edu/103765

The effects of land use and soil management on the physical properties of an Oxisol in Southeast Brazil
Provedor de dados: 90
Autores: Seben Junior,Getulio de Freitas; Corá,José Eduardo; Lal,Rattan.
Soils of the tropics are prone to a decrease in quality after conversion from native forest (FO) to a conventional tillage system (CT). However, the adoption of no-tillage (NT) and complex crop rotations may improve soil structural quality. Thus, the aim of this study was to evaluate the physical properties of an Oxisol under FO, CT, and three summer crop sequences in NT: continuous corn (NTcc), continuous soybean (NTcs), and a soybean/corn rotation (NTscr). Both NT and CT decreased soil organic carbon (SOC) content, SOC stock, water stable aggregates (WSA), geometric mean diameter (GMD), soil total porosity (TP), macroporosity (MA), and the least limiting water range (LLWR). However they increased soil bulk density (BD) and tensile strength (TS) of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: No-tillage; Soil organic carbon; Soil aggregate; Bulk density; Tropical soil; Cerrado.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000400021

Pedotransfer functions to estimate proctor test parameters under different tillage systems
Provedor de dados: 90
Autores: Álvarez,Carina Rosa; Micucci,Federico Guillermo; Bustingorri,Carolina; Taboada,Miguel Angel.
The Proctor test is time-consuming and requires sampling of several kilograms of soil. Proctor test parameters were predicted in Mollisols, Entisols and Vertisols of the Pampean region of Argentina under different management systems. They were estimated from a minimum number of readily available soil properties (soil texture, total organic C) and management (training data set; n = 73). The results were used to generate a soil compaction susceptibility model, which was subsequently validated using a second group of independent data (test data set; n = 24). Soil maximum bulk density was estimated as follows: Maximum bulk density (Mg m-3) = 1.4756 - 0.00599 total organic C (g kg-1) + 0.0000275 sand (g kg-1) + 0.0539 management. Management was equal to 0 for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil organic carbon; Soil compaction; Soil texture.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000600002

Changes in a Rhodic Hapludox under no-tillage and urban waste compost in the northwest of Rio Grande do Sul, Brazil
Provedor de dados: 90
Autores: Moraes,Moacir Tuzzin de; Silva,Vanderlei Rodrigues da; Cherubin,Maurício Roberto; Carlesso,Reimar; Debiasi,Henrique; Levien,Renato.
The use of urban waste compost as nutrient source in agriculture has been a subject of investigation in Brazil and elsewhere, although the effects on soil physical and chemical properties and processes are still poorly known. The aim of this study was to evaluate the effect of application of urban waste compost and mineral fertilizer on soil aggregate stability and organic carbon and total nitrogen content of a Rhodic Hapludox under no-tillage in the northwestern region of Rio Grande do Sul, Brazil, in the 2009/2010 and 2010/2011 growing seasons. The experiment was arranged in a 2 × 6 (seasons and fertilization) factorial in a randomized complete block design with four replications. The factor time consisted of two growing seasons (sunflower in 2009/10 and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil organic carbon; Aggregate stability; Total nitrogen; Soil structure; Organic manure.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000400028

Relationship between soil oxidizable carbon and physical, chemical and mineralogical properties of umbric ferralsols
Provedor de dados: 90
Autores: Marques,Flávio Adriano; Calegari,Márcia Regina; Vidal-Torrado,Pablo; Buurman,Peter.
The occurrence of Umbric Ferralsols with thick umbric epipedons (&amp;gt; 100 cm thickness) in humid Tropical and Subtropical areas is a paradox since the processes of organic matter decomposition in these environments are very efficient. Nevertheless, this soil type has been reported in areas in the Southeast and South of Brazil, and at some places in the Northeast. Aspects of the genesis and paleoenvironmental significance of these Ferralsols still need a better understanding. The processes that made the umbric horizons so thick and dark and contributed to the preservation of organic carbon (OC) at considerable depths in these soils are of special interest. In this study, eight Ferralsols with a thick umbric horizon (UF) under different vegetation types...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ferralsols; Tropical soils; Soil total carbon; Soil organic carbon; Pyrogenic carbon; Soil charcoal; Umbric epipedon.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000100003

Physical quality of an Oxisol under an integrated crop-livestock-forest system in the Brazilian Cerrado
Provedor de dados: 90
Autores: Sousa Neto,Eurico Lucas de; Andrioli,Itamar; Almeida,Roberto Giolo de; Macedo,Manuel Cláudio Mota; Lal,Rattan.
Soil physical quality is an important factor for the sustainability of agricultural systems. Thus, the aim of this study was to evaluate soil physical properties and soil organic carbon in a Typic Acrudox under an integrated crop-livestock-forest system. The experiment was carried out in Mato Grosso do Sul, Brazil. Treatments consisted of seven systems: integrated crop-livestock-forest, with 357 trees ha-1 and pasture height of 30 cm (CLF357-30); integrated crop-livestock-forest with 357 trees ha-1 and pasture height of 45 cm (CLF357-45); integrated crop-livestock-forest with 227 trees ha-1 and pasture height of 30 cm (CLF227-30); integrated crop-livestock-forest with 227 trees ha-1 and pasture height of 45 cm (CLF227-45); integrated crop-livestock with...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agroforestry; Soil organic carbon; Multivariate analysis.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000200025

Water-Stable Aggregates and Associated Carbon in a Subtropical Rice Soil Under Variable Tillage
Provedor de dados: 90
Autores: Ou,Hui-Ping; Liu,Xi-Hui; Chen,Qiu-Shi; Huang,Yan-Fei; He,Ming-Ju; Tan,Hong-Wei; Xu,Fang-Long; Li,Yang-Rui; Gu,Ming-Hua.
ABSTRACT Tillage systems can influence C sequestration by changing aggregate formation and C distribution within the aggregate. This study was undertaken to explore the impact of no-tillage without straw (NT-S) and with straw (NT+S), and moldboard plow without straw (MP-S) and with straw (MP+S), on soil aggregation and aggregate-associated C after six years of double rice planting in a Hydragric Anthrosol in Guangxi, southwest of China. Soil samples of 0.00-0.05, 0.05-0.20 and 0.20-0.30 m layers were wet-sieved and divided into four aggregate-size classes, &gt;2 mm, 2.00-0.25 mm, 0.25-0.053 and &lt;0.053 mm, respectively, for measuring aggregate associated C and humic and fulvic acids. Results showed that the soil organic carbon (SOC) stock in bulk soil...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hydragric Anthrosol; Soil organic carbon; Straw incorporation; Tillage system.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100514

Soil compaction and eucalyptus growth in response to forwarder traffic intensity and load
Provedor de dados: 90
Autores: Silva,Sérgio Ricardo da; Barros,Nairam Félix de; Costa,Liovando Marciano da; Leite,Fernando Palha.
During timber exploitation in forest stands harvesting machines pass repeatedly along the same track and can cause soil compaction, which leads to soil erosion and restricted tree root growth. The level of soil compaction depends on the number of passes and weight of the wood load. This paper aimed to evaluate soil compaction and eucalyptus growth as affected by the number of passes and wood load of a forwarder. The study was carried out in Santa Maria de Itabira county, Minas Gerais State - Brazil, on a seven-year-old eucalyptus stand planted on an Oxisol. The trees were felled by chainsaw and manually removed. Plots of 144 m² (four rows 12 m long in a 3 x 2 m spacing) were then marked off for the conduction of two trials. The first tested the traffic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil bulk density; Water-stable aggregates; Soil penetration resistance; Porosity; Soil organic carbon; Infiltration.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832008000300002

Characterization of Organic Matter under Different Pedoenvironments in the Viruá National Park, in Northern Amazon
Provedor de dados: 90
Autores: Vale Júnior,José Frutuoso do; Nicodem,Steven; Melo,Valdinar Ferreira; Uchôa,Sandra Catia Pereira; Cruz,Diego Lima de Sousa.
ABSTRACT Soil organic matter (SOM) fractions result from a variety of environmental processes, which affect incorporation and production rates, decomposition, alteration, and/or mineralization of organic matter. The aim of this study was to characterize SOM under the environments of rain forest, wooded campinarana (grasslands), arboreal-shrubby campinarana, grassy-woody campinarana, and pioneer plants of the Viruá National Park, in the north of the Brazilian Amazon. After chemical and physical characterization and soil classification, total organic carbon (TOC), total N, microbial activity, organic C from fulvic acid fractions (FA), humic acid (HA), and humin (Hu) were determined at two depths (0.00-0.15 and 0.15-0.30 m). The TOC was lower in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil organic carbon; Humic substances; Campinarana; Quartzipsamment; Spodosol.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100408

Effects of Long-Term Fertilization Management Practices on Soil Microbial Carbon and Microbial Biomass in Paddy Soil at Various Stages of Rice Growth
Provedor de dados: 90
Autores: Xu,Yilan; Tang,Haiming; Xiao,Xiaoping; Li,Weiyan; Li,Chao; Sun,Geng; Cheng,Kaikai.
ABSTRACT Soil microbial biomass plays a significant role in soils, and it is often used as an early indicator of change in soil quality. Soil microbial biomass is affected by different fertilization management practices. Therefore, the impact of different long-term fertilization management practices on the soil organic carbon (SOC) content, soil microbial biomass carbon (SMBC), and soil microbial biomass nitrogen (SMBN), as well as the soil microbial quotient (SMQ) in the tilled layer (0.00-0.20 m) were studied in the present paper, together with grain yield, in a double-cropping rice (Oryza sativa L.) system. The experiment in NingXiang county of Hunan Province, China, begin in 1986, and the experiment included five fertilization treatments: without...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Paddy field; Fertilizer regime; Double-cropping rice; Soil organic carbon; Grain yield.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100411

Successional patterns along soil development gradients formed by glacier retreat in the Maritime Antarctic, King George Island
Provedor de dados: 97
Autores: Boy,Jens; Godoy,Roberto; Shibistova,Olga; Boy,Diana; McCulloch,Robert; la Fuente,Alberto Andrino de; Morales,Mauricio Aguirre; Mikutta,Robert; Guggenberger,Georg.
BACKGROUND: Maritime Antarctica is severely affected by climate change and accelerating glacier retreat forming temporal gradients of soil development. Successional patterns of soil development and plant succession in the region are largely unknown, as are the feedback mechanisms between both processes. Here we identify three temporal gradients representing horizontal and vertical glacier retreat, as well as formation of raised beaches due to isostatic uplift, and describe soil formation and plant succession along them. Our hypotheses are (i) plants in Antarctica are able to modulate the two base parameters in soil development, organic C content and pH, along the temporal gradients, leading to an increase in organic carbon and soil acidity at relatively...
Tipo: Journal article
Palavras-chave: Temporal gradients; Chronosequences; Soil succession; Soil organic carbon; Ornithic; Mycorrhiza; Maritime Antarctica; King George Island.
Ano: 2016
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2016000100007

Changes in attributes of soils subjected to fallow in desertification hotspot
Provedor de dados: 124
Autores: Ferreira,Mirele Paula da Silva; Artur,Adriana Guirado; Queiroz,Hermano Melo; Romero,Ricardo Espíndola; Costa,Mirian Cristina Gomes.
ABSTRACT  Soils in semi-arid regions have been degraded by overgrazing, which reduces the production capacity and, in certain situations, leads to desertification. An alternative to recover degraded areas is the fallow period, which works through the resilience of the soil itself, increasing the supply of organic matter and improving soil physical properties. Thus, the objective of this study was to test the hypothesis that 14-year grazing exclusion improves soil physical and chemical attributes in degraded areas under desertification. The study was conducted in Irauçuba, Ceará State, Brazil. The experimental design was completely randomized, in a 4 x 2 factorial scheme corresponding to four areas and two managements (overgrazing and fallow), with four...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil organic carbon; Soil degradation; Semi-arid region; Overgrazing.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902018000100022

Assessing soil carbon stocks under pastures through orbital remote sensing
Provedor de dados: 63
Autores: Szakács,Gabor Gyula Julius; Cerri,Carlos Clemente; Herpin,Uwe; Bernoux,Martial.
The growing demand of world food and energy supply increases the threat of global warming due to higher greenhouse gas emissions by agricultural activity. Therefore, it is widely admitted that agriculture must establish a new paradigm in terms of environmental sustainability that incorporate techniques for mitigation of greenhouse gas emissions. This article addresses to the scientific demand to estimate in a fast and inexpensive manner current and potential soil organic carbon (SOC) stocks in degraded pastures, using remote sensing techniques. Four pastures on sandy soils under Brazilian Cerrado vegetation in São Paulo state were chosen due to their SOC sequestration potential, which was characterized for the soil depth 0-50 cm. Subsequently, a linear...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brazil; Leaf Area Index; Soil organic carbon; Pasture degradation; Spectral reflectance; Climate change.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000500010

Soil and crop residue CO2-C emission under tillage systems in sugarcane-producing areas of southern Brazil
Provedor de dados: 63
Autores: Teixeira,Luís Gustavo; Corradi,Mariana Marotti; Fukuda,Adrian; Panosso,Alan Rodrigo; Reicosky,Donald; Lopes,Afonso; La Scala Jr.,Newton.
Appropriate management of agricultural crop residues could result in increases on soil organic carbon (SOC) and help to mitigate gas effect. To distinguish the contributions of SOC and sugarcane (Saccharum spp.) residues to the short-term CO2-C loss, we studied the influence of several tillage systems: heavy offset disk harrow (HO), chisel plow (CP), rotary tiller (RT), and sugarcane mill tiller (SM) in 2008, and CP, RT, SM, moldboard (MP), and subsoiler (SUB) in 2009, with and without sugarcane residues relative to no-till (NT) in the sugarcane producing region of Brazil. Soil CO2-C emissions were measured daily for two weeks after tillage using portable soil respiration systems. Daily CO2-C emissions declined after tillage regardless of tillage system....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil respiration; Carbon dioxide; Emission after tillage; Soil organic carbon.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162013000500007

Chemical and physical properties of an anthropogenic dark earth soil from Bragança, Para, Eastern Amazon
Provedor de dados: 36
Autores: SOUZA,Luma Castro de; LIMA,Herdjania Veras de; RODRIGUES,Sueli; KERN,Dirse Clara; SILVA,Álvaro Pires da; PICCININ,Jorge Luiz.
ABSTRACT Although anthropogenic dark earth (ADE) is generally found in non-floodable land, it also occurs on floodplains but, there is no information about the chemical and physical characteristics of ADE in this environment. In this study, we propose to check the hypothesis that a Gleysol, classified as ADE, presents improved chemical and physical conditions than an adjacent soil, no anthropogenic. Thus, the objective of this study was to characterize the chemical and physical properties of the top layer of two ADE profiles in a Gleysol and compare them with an adjacent soil. Samples were taken from two areas classified as ADE in Bragança, Pará State, Brazil, at the "Jabuti" archaeological site, and from an adjacent non-anthropogenic site. Disturbed and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anthropic horizon; Soil organic carbon; Soil quality; Floodplain soils.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672016000400337

The evaluation of two promising rainfed wheat cultivars as affected by different seeding rate in conventional and conservation tillage systems
Provedor de dados: 111
Autores: Khodadoost, Farshid; Pasari, Babak; Abdulahi, Abdolvahab; Rokhzadi, Asad; Mohammadi, Khosro.
This experiment was conducted to evaluate of two promising rainfed wheat cultivars as affected by different seeding rate in conventional and conservation tillage systems in the research field of the Dryland Agriculture Research Institute (DARI), Sararood branch, Kermanshah, Iran. The experiment layout designed as strip-split plot in a randomized complete block design with 3 replications during two consecutive growing seasons 2017-18 and 2018-19. The tillage systems were placed next to each other as a separate site at two levels: conventional tillage and conservation tillage (no tillage). Wheat cultivars were performed horizontally at two levels (Baran and Rijaw) and the seeding rate was carried out vertically with eight levels (75, 100, 125, 150, 175, 200,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cultivar; Density; Protein; Soil organic carbon; Tillage.
Ano: 2022
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/7383

Effects of land use conversion on soil aggregate stability and organic carbon in different soils
Provedor de dados: 115
Autores: Ćirić,Vladimir; Manojlović,Maja; Belić,Milivoj; Nešić,Ljiljana; Šeremešić,Srdan.
Aggregate stability is an important factor of the soil functioning. Greater aggregate stability leads to greater soil organic carbon (SOC) preservation, while SOC acts as a key cementing agent in aggregation processes. The objective of this study was to investigate the effects of native vegetation conversion in soil aggregate stability and SOC concentration. The investigation was conducted in the Vojvodina Province, Serbia, in July 2009. Undisturbed soil samples were taken from Haplic Chernozem, Haplic Fluvisol and Gleyic Vertisol, at a depth ranging from 0 to 20 cm. A completely randomized experimental design was used with three replicates. Each soil type was considered under treatments 1) cropland &amp;gt;100 years, 2) native meadow and 3) native...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aggregate stability; Soil organic carbon; Land use change; Soil type; Soil structure.
Ano: 2013
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952013000600002

Influence of inorganic and organic fertilization on microbial biomass carbon and maize yield in two soils of contrasting pH
Provedor de dados: 115
Autores: Arrieche-Luna,Elena; Ruiz-Dager,Magaly.
Inappropriate soil management practices that have been applied in the Yafacuy River basin, Venezuela, have led to the loss of soil organic matter and crop productivity. The incorporation of composted organic residues has been suggested as an alternative management practice in order to increase organic matter (OM) content and crop yield in these soils. The objective of this study was to determine the effects of different application fates of an organic fertilizer obtained from sugarcane industry wastes, filter cake and bagasse with or without inorganic fertilizers, on microbial biomass carbon (MB-C), soil organic carbon (SOC), maize (Zea mays L.) yield and N, P, K content in the maize leaves, in Yafacuy River basin. The experiments were established in an...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Maize yield; Organic fertilization; Soil microbial biomass carbon; Soil organic carbon; Sugar cane filter cake.
Ano: 2010
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952010000300001

Microbial biomass and organic matter in an oxisol under application of biochar
Provedor de dados: 53
Autores: Petter,Fabiano André; Leite,Luiz Fernando Carvalho; Machado,Diogo Milhomem de; Marimon Júnior,Ben Hur de; Lima,Larissa Borges de; Freddi,Onã da Silva; Araújo,Ademir Sérgio Ferreira.
ABSTRACT The aim of this study was to investigate the short- and medium-term effect of biochar on soil microbial properties, organic carbon and nitrogen in an Oxisol from Brazil. The experiment was conducted in a randomized block design consisting of five levels of biochar (0, 2, 4, 8 and 16 Mg∙ha–1) with and without of synthetic fertilizer: 0 and 200 kg.ha–1 of synthetic fertilizer N-P-K (00-20-20). The following soil properties were determined: microbial biomass carbon (MBC) and nitrogen (MBN), microbial respiration (MR), metabolic quotient (qCO2) and microbial quotient (qMIC), total organic carbon (TOC) and nitrogen (TN). The MBC, qCO2 and carbon management index (CMI) were not altered by doses of fertilizer and biochar. The presence of biochar reduced...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Microbial activity; Soil organic carbon; Metabolic quotient; Brazilian soil.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052019000100109

Greenhouse Gas (CO2 AND N2O) Emissions from Soils: A Review
Provedor de dados: 117
Autores: Muñoz,Cristina; Paulino,Leandro; Monreal,Carlos; Zagal,Erick.
In agricultural activities, the main greenhouse gases (GHG) are those related to C and N global cycles. The impact of agriculture on GHG emissions has become a key issue, especially when considering that natural C and N cycles are influenced by agricultural development. This review focuses on CO2 and N2O soil emissions in terrestrial ecosystems, with emphasis in Chilean and similar agro-ecosystems around the world. The influence of land use and crop management practices on CO2 and N2O emissions is analyzed; some mitigation measures to reduce such emissions are also discussed here. More knowledge on the biological processes that promote of GHG emissions from soil will allow creating opportunities for agricultural development under friendly-environmental...
Tipo: Journal article
Palavras-chave: Global warming; Carbon dioxide; Nitrous oxide; Soil biological processes; Soil organic carbon; Nitrification; Denitrification.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000300016

Use of VIS-NIRS for land management classification with a support vector machine and prediction of soil organic carbon and other soil properties
Provedor de dados: 118
Autores: Debaene,Guillaume; Piku&amp;#322;a,Dorota; Nied&amp;#378;wiecki,Jacek.
The objective of this research was to investigate the effects of a long-term experiment on soil spectral properties and to develop prediction models of these properties (soil organic carbon (SOC), N, pH, Hh, P2O5, K2O, Ca, Mg, K, and Na content) from texturally homogeneous samples (loamy sand). To this aim, chemometric techniques, such as partial least square (PLS) regression and support vector machine (SVM) classification, were used. Our results show that visible and near infrared spectroscopy (VIS-NIRS) is suitable for the prediction of properties of texturally homogeneous samples. The effects of fertilizer applications were sufficient to modify the soil chemical composition to a range suitable for using VIS-NIRS for calibration and modeling purposes....
Tipo: Journal article
Palavras-chave: Manure; Near-infrared spectroscopy; Nitrogen fertilizer; Partial least square regression; Soil organic carbon; Support Vector Machine.
Ano: 2014
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202014000100003