|
|
|
| Registros recuperados: 174 | |
|
| |
|
|
| Barbieri,Diogo Mazza; Marques Júnior,José; Siqueira,Diego Silva; Teixeira,Daniel De Bortoli; Panosso,Alan Rodrigo; Pereira,Gener Tadeu; La Scala Junior,Newton. |
| Improvements in working conditions, sustainable production, and competitiveness have led to substantial changes in sugarcane harvesting systems. Such changes have altered a number of soil properties, including iron oxides and organic matter, as well as some chemical properties, such as the maximum P adsorption capacity of the soil. The aim of this study was to characterize the relationship between iron oxides and the quality of organic matter in sugarcane harvesting systems. For that purpose, two 1 ha plots in mechanically and manually harvested fields were used to obtain soil samples from the 0.00-0.25 m soil layer at 126 different points. The mineralogical, chemical, and physical results were subjected to descriptive statistical analyses, such as the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Degree of humification; Geochemistry; Soil management; Sustainable agriculture. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000400010 |
| |
|
|
| Inda,Alberto Vasconcellos; Torrent,José; Barrón,Vidal; Bayer,Cimélio; Fink,Jessé Rodrigo. |
| Replacing conventional tillage (CT) with no-tillage (NT) management alters the pedoenvironment and the rate of topsoil processes, with possible effects on dissolution processes associated with iron oxides and therefore soil mineralogy. This study aimed to determine the effect of NT on the content and distribution of types of iron oxides in a Rhodic Paleudult in southern Brazil. Soil samples were collected at eight depths within the 0.00-0.80 m layer under CT and NT in a long-term experiment (21 years). Mineralogical identification was conducted by X-ray diffraction (XRD), and the Fe content related to specific types of iron oxides determined by selective dissolution and diffuse-reflectance spectroscopy. Kaolinite, quartz, goethite, hematite, and maghemite... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dissolution; Ferrihydrite; Hematite; Maghemite; Soil management. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162013000100008 |
| |
|
| |
|
|
| Assis,Cristiane Pereira de; González-Vila,Francisco Javier; Jucksch,Ivo; González-Pérez,Jose Antonio; Neves,Júlio César Lima; Lani,João Luis; Mendonça,Eduardo de Sá. |
| Soil organic matter of a humic Oxisol has been characterized by analyzing litter and soil lipid composition under vegetal covers (coffee, pasture and fragment of native forest). Soil and litter samples were collected from each site at two depths (0-10 and 60-100 cm). Lipid composition was determined by gas chromatography-mass spectrometry (CG-MS). In the solvent extracts of the soil lipids, even-numbered n-alkanoic acids in the range of C16-C32 indicate a soil organic matter input from higher plant waxes. The major compound classes in both the soil and the litter included saturated n-alkanoic acids, with average values in the total spectrum of 58 and 53%, respectively Clear differences in lipid composition were found between the topsoil and subsurface.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil and litter lipid; Soil management; Tropical soil; Grass; Coffee. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000200014 |
| |
|
| |
|
| |
|
|
| DEON, D. S.. |
| A manutenção da umidade no solo é de suma importância para o desenvolvimento das culturas, embora seja um grande desafio para o semiárido, principalmente por causa das condições de clima e de solo. A temperatura e a insolação são elevadas, enquanto a umidade relativa do ar é baixa, resultando em altas taxas de evapotranspiração, as quais, associadas ao baixo índice pluviométrico, e à distribuição irregular das chuvas resultam em deficit hídrico na maior parte do ano. Além disso, as características comuns aos solos, em geral arenosos e pouco profundos, são fatores que limitam sua capacidade de armazenamento de água. Assim, estratégias de manejo que possam favorecer à manutenção da água no solo são de grande importância para os cultivos dependentes de chuva... |
| Tipo: Artigo de divulgação na mídia (INFOTECA-E) |
Palavras-chave: Manutenção da umidade; Pratica de manejo; Solo; Manejo do Solo; Umidade do Solo; Solo Arenoso; Erosão do Solo; Arid soils; Soil management; Relative humidity. |
| Ano: 2017 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1098833 |
| |
|
| |
|
| |
|
| |
|
|
| TAVARES, S. R. de L.; AMARAL, F. C. S. do; BOTELHO, F. P.. |
| O objetivo desta publicação é mostrar ao usuário do sistema, como as propriedades de solo e água solicitados pelo SiBCTI, são obtidas no campo e/ou determinadas em laboratório. Nossa pretensão é familiarizar ou recordar aos usuários, através dessas informações sistematizadas neste documento, sobre as gêneses e análises dessas variáveis. Nas videoaulas práticas 11 e 12 do Curso: Sistema Brasileiro de Classificação de Terras para Irrigação oferecido pelo Ambiente Virtual de Aprendizado (AVA) da Embrapa, você terá a oportunidade de "viajar" para o campo conosco e "visitar" os nossos laboratórios, para visualmente observar como tudo isso é feito na prática. Nesta publicação, todos os métodos de análise de solo e água solicitados ao usuário do SiBCTI estão... |
| Tipo: Documentos (INFOTECA-E) |
Palavras-chave: Análise do Solo; Manejo de Água; Irrigação; Captação D´água; Sistema de Irrigação; Soil analysis; Soil management; Irrigation; Irrigation systems. |
| Ano: 2021 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1135394 |
| |
|
| |
|
| |
|
|
| TENORIO, A. R. de M.; GRACA, J. J. da C.; GOES, J. E. M.; MENDEZ, J. R.; GAMA, J. R. N. F.; SILVA, P. R. O. da; CHAGAS, P. S. M. das; SILVA, R. N. P. da; AMERICO, R. R.; PEREIRA, W. L. M.. |
| bitstream/item/223708/1/Mapeamento-dos-solos-da-estacao.pdf |
| Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E) |
Palavras-chave: Castanhal; Pará; Brasil; Classificação do Solo; Manejo do Solo; Reconhecimento do Solo; Uso da Terra; Amazonia; Land use; Soil classification; Soil management; Soil surveys. |
| Ano: 1999 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/374949 |
| |
|
|
| Dafonte,Jorge Dafonte; Guitián,Montserrat Ulloa; Paz-Ferreiro,Jorge; Siqueira,Glécio Machado; Vázquez,Eva Vidal. |
| Nutrient maps based on intensive soil sampling are useful to develop site-specific management practices. Geostatistical methods have been widely used to determine the spatial correlation and the range of spatial dependence at different sampling scales. If spatial dependence is detected, the modelled semivariograms can then be used to map the interested variable by kriging, an interpolation method that produces unbiased estimates with minimal estimation variance. The objectives of this paper were to examine and to map the spatial distribution of the micronutrients Cu, Zn, Fe and Mn on an agricultural area in Galicia, Spain, under European Atlantic climatic conditions. The ordinary kriging was first used to determine the values for the non-sampled locations,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil management; Geostatistics; Spatial variability; Soil chemistry. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052010000500018 |
| |
|
|
| Ferreira,Enderson Petrônio de Brito; Santos,Henrique Pereira dos; Costa,Janaina Ribeiro; De-Polli,Helvécio; Rumjanek,Norma Gouvêa. |
| An experiment was carried out under field conditions to assess the effects of soil management (no-tillage- NT and conventional tillage- CT) and crop rotation systems on microbial biomass-C (Cmic), basal soil respiration (BSR), metabolic quotient (qCO2), soil organic carbon content (Corg) and microbial carbon to organic carbon ratio (Cmic/Corg). Soil samples were collected on an area cultivated with wheat as winter crop and soybean as summer crop, both in rotation with vetch, maize and oats. Samples were also collected in a secondary forest used as reference. Data of each management system (NT and CT) were compared to forest area by "t" test (p<0.05) and crop rotations were compared by Tukey test (p<0.05). All data were submitted to multivariate... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Microbial biomass; Microbial respiration; Organic matter; Soil management. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902010000200002 |
| |
|
| |
|
| |
|
|
| Trasar-Cepeda,Carmen; Leirós,Maria Carmen; Gil-Sotres,Fernando. |
| Human activity is one of the main causes of the physical, chemical and biological degradation of soils. This degradation implies a change in soil quality as it involves both a decrease in productivity and changes in the ecological functions of the soil. The objective of the present study was to investigate the effect of soil use on soil biochemical properties, with the aim of providing data that allow assessment of the usefulness of enzymatic activities as indicators of soil quality. In addition to physical and chemical properties, different hydrolase enzymes involved in the C, N, P and S cycles, and other biochemical properties, such as the microbial biomass C and soil basal respiration, were analysed. The results obtained allowed different conclusions to... |
| Tipo: Journal article |
Palavras-chave: Soil enzymes; Soil biochemical properties; Soil use; Soil management; Forest soils; Agricultural soils. |
| Ano: 2008 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912008000200007 |
| |
| Registros recuperados: 174 | |
|
|
|
