Results 41 to 50 of about 49,382 (215)

Dessorção de fósforo por silício em solos cultivados com eucalipto

Revista Brasileira de Ciência do Solo, 2000
Com o objetivo de avaliar a dessorção de fósforo por silício nas camadas superficiais de um Latossolo Vermelho-Escuro sob cerrado e de um Cambissolo sob campo cerrado, da zona fisiográfica Campos das Vertentes (MG), foram realizados experimentos em casa ...
R. Carvalho, A. E. Furtini Neto, N. Curi, L. A. Fernandes, A. C. Oliveira Jr.   +4 more
doaj   +1 more source

Fracionamento de substâncias húmicas do solo por cromatografia de exclusão em coluna. [PDF]

, 2012
Representacao esquematica do principio da exclusao; moleculas grandes (MG) somente se movem externamente ao granulo ou matriz cromatografica (volume morto = Vo), ao passo que moleculas pequenas (Mp) podem se mover tambem por dentro dos granulos (volume ...
GERZABEK, M. H., MACHADO, P. L. O. de A., MADARI, B. E.   +2 more
core  

Potássio nas frações texturais de um Latossolo

Acta Scientiarum. Agronomy, 2008
The aim of this work was to study the distribution of non-exchangeable forms of potassium in different size fractions of an Oxisol, cultivated with banana for two years in plots with and without irrigation (main plot) and varying potassium levels (0, 300, 600 and 900 kg ha-1 of K2O) (sub-plots), in a randomized split-plot block design.
Chiba, Marcio Koiti, Natale, William, Pessoa da Cruz, Mara Cristina, Junqueira Teixeira, Luiz Antonio, Centurion, Jose Frederico   +4 more
openaire   +4 more sources

Tensile Strength: A Pedologist's Perspective on Variability in Cohesive and Non‐Cohesive Horizons From Brazil's Coastal Tablelands

Journal of Plant Nutrition and Soil Science, Volume 189, Issue 1, Page 36-48, February 2026.
ABSTRACT Background Previous research has underscored the importance of evaluating soil consistency for accurate determination of cohesive character and mechanical properties. Although qualitative assessments by pedologists are pertinent, they exhibit inherent subjectivity that may compromise accuracy.
Jaedson Cláudio Anunciato Mota, Cillas Pollicarto da Silva, Thiago Leite de Alencar, Márcio Godofrêdo Rocha Lobato, Lucas de Sousa Oliveira, Ricardo Espíndola Romero, Ícaro Vasconcelos do Nascimento, João Marcos Rodrigues dos Santos, Alexandre dos Santos Queiroz   +8 more
wiley   +1 more source

Dissipation of DvSnf7 Double‐Stranded RNA in Brazilian Soils

Agricultural &Environmental Letters, Volume 4, Issue 1, 2019., 2019
Core Ideas Approval of biotech crops in Brazil requires an exposure assessment. Double‐stranded RNA produced by maize MON 87411 is unlikely to persist in tropical soil. Soil dissipation results with dsRNA can be generalized across diverse geographies.
Marcela Emanuele Scarso Joaquim, Gustavo Gross Belchior, Marcia Ometto de Mello Alves José, Fatima Zapata, Changjian Jiang, Joshua Fischer, Geraldo Ubirajara Berger   +6 more
wiley   +1 more source

Arbuscular mycorrhizal fungal communities and soil aggregation as affected by cultivation of various crops during the sugarcane fallow period

Revista Brasileira de Ciência do Solo, 2014
Management systems involving crop rotation, ground cover species and reduced soil tillage can improve the soil physical and biological properties and reduce degradation.
Priscila Viviane Truber, Carolina Fernandes   +1 more
doaj   +1 more source

Avaliação do impacto ambiental de sistemas intensivos de produção de carne bovina conduzidos em pastagens. [PDF]

, 2016
bitstream/CPPSE/17576/1/Boletim14.pdfISSN 1981 ...
CORRÊA, L. de A., PRIMAVESI, O.
core  

ATRIBUTOS QUÍMICOS DE LATOSSOLO VERMELHO SUBMETIDO A DIFERENTES MANEJOS

FLORESTA, 2015
A retirada da vegetação natural para implantação de sistema agrícola pode provocar desequilíbrios no solo, conforme o sistema de manejo empregado. Com o objetivo de estudar as alterações em Latossolo Vermelho Distrófico causadas pelo cultivo contínuo de cana-de-açúcar, selecionaram-se três áreas (mata, cana-de-açúcar e reflorestada) adjacentes, no ...
de Freitas, Ludmila, Casagrande, José Carlos, de Oliveira, Ivanildo Amorim, Campos, Milton César Costa, de Oliveira, Vinícius Mendes Rodrigues   +4 more
openaire   +4 more sources

Complementary geophysical, geomorphometric and pedological approaches for characterizing shallow and deep subsurface materials in a colluvial‐alluvial plain in Atlantic rainforest

Earth Surface Processes and Landforms, Volume 50, Issue 15, December 2025.
This study combines GPR, 2D ERT and UAV‐derived terrain models to characterize sediment variability in a colluvial‐alluvial plain. GPR identified sandy lenses and clay‐rich layers, while ERT revealed deeper conductive and resistive zones, including a gneissic basement.
Nádia Mariane Mucha, Luiz Claudio de Paula Souza, Alessandra de Barros Silva Bongiolo, Rodoilton Stevanato, Rafael Espindola Canata, Jairo Calderari de Oliveira   +5 more
wiley   +1 more source

Soil Carbon Dynamics in Soybean Cropland and Forests in Mato Grosso, Brazil

Journal of Geophysical Research: Biogeosciences, Volume 123, Issue 1, Page 18-31, January 2018., 2018
Abstract Climate and land use models predict that tropical deforestation and conversion to cropland will produce a large flux of soil carbon (C) to the atmosphere from accelerated decomposition of soil organic matter (SOM). However, the C flux from the deep tropical soils on which most intensive crop agriculture is now expanding remains poorly ...
R. Chelsea Nagy, Stephen Porder, Paulo Brando, Eric A. Davidson, Adelaine Michela e Silva Figueira, Christopher Neill, Shelby Riskin, Susan Trumbore   +7 more
wiley   +1 more source