A5035424782- Soil and Unsaturated Flow
- Soil Management and Crop Yield
- Sugarcane Cultivation and Processing
- Soil Geostatistics and Mapping
- Soil Moisture and Remote Sensing
- Geophysical Methods and Applications
- Soil Carbon and Nitrogen Dynamics
- Graphite, nuclear technology, radiation studies
- Soil erosion and sediment transport
- Landslides and related hazards
- Radiation Shielding Materials Analysis
- Groundwater flow and contamination studies
- Nuclear Physics and Applications
- Geophysical and Geoelectrical Methods
- Clay minerals and soil interactions
- Image Processing and 3D Reconstruction
- Experimental and Theoretical Physics Studies
- Mineral Processing and Grinding
- Electrical and Bioimpedance Tomography
- Rice Cultivation and Yield Improvement
- COVID-19 impact on air quality
- Radioactivity and Radon Measurements
- Irrigation Practices and Water Management
- Heat and Mass Transfer in Porous Media
- COVID-19 epidemiological studies
Universidade Estadual de Ponta Grossa
2012-2024
Universidade de São Paulo
1999-2003
Brazilian Agricultural Research Corporation
2002
Methodist University of Piracicaba
2000
In this work is presented the use of C/N ratio and Laser Induced Fluorescence (LIF) spectroscopy for determining humification soil organic matter (SOM) in an Oxisol under three different long-term tillage managements (no-tillage (NT), reduced (RT) conventional (CT)). Humification SOM was evaluated its fractions (clay < 2 μm, silt 2–20 sand 20–1000 μm). The obtained results show that lower observed NT, mainly at surface (0–5 cm). CT, values maintained constant all investigated depths (0–5,...
The state-space approach is used to describe surface soil water content and temperature behaviour, in a field experiment which sugarcane submitted different management practices. treatments consisted of harvest trash mulching, bare soil, burned trash, all three ratoon crop, after first cane harvest. One transect 84 points was sampled, meter by meter, covering borders. described detail the results show that contents measured along could successfully be estimated from observations made at neighbour.
The change in management practices of the sugarcane crop Brazil, from traditional trash burning before harvest to new practice that leaves residues on field after harvest, can lead alterations water regime and also soil compaction levels. In this study a neutron-gamma surface gauge was used monitor spatial temporal variabilities moisture density experimental area submitted 3 practices: (i) mulched with residues, (ii) bare inter-row, (iii) ash harvest. Variability content bulk studied using...
Soil pore structure characterization using 2-D image analysis constitutes a simple method to obtain essential information related soil porosity and size distribution (PSD). Such is important infer on quality, which transport processes inside the soil. Most of time soils are submitted wetting drying cycles (W-D), can cause changes in with damaged structures. This report uses evaluate possible modifications induced by W-D samples. Samples three tropical (Geric Ferralsol, GF; Eutric Nitosol,...
Core Ideas X‐ray microtomography. An image‐based approach to determine soil pore distributions. Integration between information obtained in different spatial resolutions. Soil pores form interconnected networks that directly or indirectly influence transport processes soils. There is great interest estimating properties such as size and shape from three‐dimensional (3D) images a way of understanding linkages structure function. This work evaluates the applicability an measure pore‐size...
Conservation agriculture is increasingly preferred to conventional methods due its benefits in promoting more sustainable soil management. Our study aims compare physical and morphological properties, at the microscale, of soils under long-term no tillage (NT) minimum-tillage (MT) adjacent ‘natural’ secondary forest (SF). Soil aggregates c. 2 cm length were imaged by X-ray Computed Tomography (XCT). The three-dimensional (3D) images segmented analyzed order assess properties such as...
The state-space approach is used to evaluate the relation between soil physical and chemical properties in an area cultivated with sugarcane. experiment was carried out on a Rhodic Kandiudalf Piracicaba, State of São Paulo, Brazil. Sugarcane planted 0.21 ha i.e., 15 rows 100 m long, spaced 1.4 m. Soil water content, organic matter, clay content aggregate stability were sampled along transect 84 points, meter by meter. how affected itself neighboring locations, different combinations, aiming...
A gamma-ray computed tomography (CT) scanner was used to evaluate changes in the structure of clayey soil samples with surface compaction submitted wetting and drying (W–D) cycles. The obtained results indicate that W–D cycles promoted an increasing about 10% porosity a decreasing 6% bulk density this compacted region. With use CT it also possible define thickness region our case 8.19 mm. This last information is very important, for instance, estimate hydraulic parameters infiltration...
Soils are dynamic and complex systems in their natural state, which subjected to profound changes due management. Additionally, agricultural soils continuously exposed wetting drying (W-D) cycles, can cause modifications the complexity of pores. Thus, we explore how successive W-D cycles affect pore network an Oxisol under contrasting managements (conventional tillage-CT, minimum tillage-MT, no tillage-NT, secondary forest-F). The soil architecture was evaluated using a 3D multifractal...
Results of an organic matter management experiment a sugar cane crop are reported for the first cropping year. Sugar was planted in October 1997, and labeled with 15N fertilizer pulse to study fate soil-plant system. A nitrogen balance is presented, partitioning system plant components (stalk, tip straw), soil (five fractions) evaluating leaching losses. The label permitted determine, at end growing season, amounts derived from fertilizer, present above mentioned compartments.