A5016013955- Clay minerals and soil interactions
- Soil Management and Crop Yield
- Iron oxide chemistry and applications
- Growth and nutrition in plants
- Soil and Unsaturated Flow
- Soil Carbon and Nitrogen Dynamics
- Heavy metals in environment
- Soil erosion and sediment transport
- Aquatic Ecosystems and Phytoplankton Dynamics
- Soil and Water Nutrient Dynamics
- Mine drainage and remediation techniques
- Phosphorus and nutrient management
- Water Quality and Pollution Assessment
- Geography and Environmental Studies
- Geotechnical Engineering and Soil Stabilization
- Environmental and biological studies
- Flowering Plant Growth and Cultivation
- Geochemistry and Geologic Mapping
- Plant Micronutrient Interactions and Effects
- Environmental Toxicology and Ecotoxicology
- Legume Nitrogen Fixing Symbiosis
- Pesticide and Herbicide Environmental Studies
- Nematode management and characterization studies
- Weed Control and Herbicide Applications
- Plant tissue culture and regeneration
Universidade de Passo Fundo
2014-2024
Instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Sul
2023
Institute of Technology of Cambodia
2023
Fundo Brasil
2008-2021
University Press of Florida
2011-2018
Universidade Federal de Santa Maria
2000-2005
Institut National de la Recherche Agronomique
2005
Soil Science Research Unit
2002
In this work the exposure of wells and surface water to pesticides, commonly used for tobacco cropping, was assessed.Water consumption flows were sampled at different times.After a preconcentration step with solid phase extraction (SPE), selected pesticides determined by gas chromatography electron capture detection (GC-ECD) or high performance liquid diode array (HPLC-DAD).No detected in well samples flow winter season.However, spring summer higher concentrations chlorpyrifos imidacloprid...
Analyzing the soil near crop roots may reveal limitations to growth and yield even in a no-tillage system. The purpose of present study was relate chemical physical properties under system soybean root plant after five years use different types limestone forms application. A clayey Oxisol received application dolomitic calcitic limestones their 1:1 combination two forms: surface application, maintained on surface; incorporated, applied incorporated mechanically. Soil (resistance mechanical...
A aplicação superficial de calcário pode ser uma alternativa para a correção da acidez do solo sob plantio direto. Este trabalho avaliou as modificações em alguns atributos químicos provocadas pela e incorporado ao partir pastagem natural. O experimento foi feito na área Experimental Departamento Solos Universidade Federal Santa Maria (RS), num Argissolo Acinzentado distrófico plíntico. Os tratamentos, com 0,0, 2,0, 8,5 17,0 t ha-1 camada 0-20 cm superfície, foram distribuídos blocos acaso,...
O teor de C orgânico total do solo (COT) pode ser determinado por métodos que se baseiam nos princípios combustão a seco e úmida. Ambos apresentam inconvenientes, principalmente o úmida, exige grande quantidade reagentes, gerando, conseqüência, alta resíduos tóxicos contêm Cr. método denominado Mebius no bloco digestão (Mebius bloco) permite diminuição uso dicromato potássio em análises solo. Nesse sentido, presente estudo objetivou verificar precisão exatidão relação outros úmida seco....
Realizou-se este trabalho com o intuito de quantificar a presença moléculas agrotóxicos em águas superficiais três unidades paisagísticas (UP) diferentes configurações uso, numa microbacia hidrográfica cabeceira Agudo, RS. Dois coletores semi-automáticos água foram instalados no córrego cada UP, onde se coletaram amostras, por ocasião chuvas, épocas da cultura do fumo: transplante, aterramento junto aos pés (planta 6-10 folhas) e colheita. Os princípios ativos imidacloprid, atrazina,...
Abstract The purpose of this study was to investigate the clay mineral phases in a Rhodic Acrisol soil and discuss their evolution subtropical conditions. Prairie forest profiles were sampled fractions parent material horizons analysed by X-ray diffraction (XRD) at Federal University Santa Maria, Rio Grande do Sul-Brazil. XRD results show presence interstratified kaolinite-smectite illite-smectite as well illite material. These minerals also found samples but with two new phases:...
Soil water properties are related to crop growth and environmental aspects influenced by the degree of soil compaction. The objective this study was determine infiltration hydraulic conductivity saturated under field conditions in terms compaction two Oxisols a no-tillage (NT). Two commercial fields were studied state Rio Grande do Sul, Brazil: one Haplortox after 14 years NT; other Hapludox seven NT. Maps (50 x 30 m) levels mechanical penetration resistance (PR) drawn based on kriging...
Summary In soils in general, the cation exchange capacity is an important factor soil fertility because it determines both retention and selectivity, turn controls most of other properties. The main goal this paper was to estimate (CEC) contribution permanent charges pH‐dependent their respective importance CEC as a function pH, clay organic matter content soils. A multiple regression method developed from 75 samples under different management practices. charge (∼ 140 mmol c kg −1 clay)...
Ferralsols ( Latossolos ) should contain few or no 2:1 clay minerals and have low potassium (K) contents, consequently levels of non-exchangeable K forms are expected. The aim this study was to evaluate how the mineralogy a Ferralsol affects soil dynamics in response fertilization during cropping whether altered due successive crops fertilization. A tropical Brazilian under field conditions sampled (0.00-0.20 m) contrasting plots: application (control plot) 3,200 kg ha-1 applied K2O...