A5010017214- Soil and Unsaturated Flow
- Soil Management and Crop Yield
- Growth and nutrition in plants
- Soil Moisture and Remote Sensing
- Soil Geostatistics and Mapping
- Soil Carbon and Nitrogen Dynamics
- Irrigation Practices and Water Management
- Groundwater flow and contamination studies
- Crop Yield and Soil Fertility
- Soil erosion and sediment transport
- Landslides and related hazards
- Soybean genetics and cultivation
- Legume Nitrogen Fixing Symbiosis
- Rice Cultivation and Yield Improvement
- Geophysical and Geoelectrical Methods
- Geography and Environmental Studies
- Sugarcane Cultivation and Processing
- Plant nutrient uptake and metabolism
- Nuclear Physics and Applications
- Banana Cultivation and Research
- Hydrology and Watershed Management Studies
- Environmental and biological studies
- Radioactivity and Radon Measurements
- Plant Water Relations and Carbon Dynamics
- Agronomic Practices and Intercropping Systems
Universidade de São Paulo
2015-2024
Secretaria de Agricultura e Abastecimento
1999-2021
Xinjiang Institute of Water Resources and Hydropower Research
2021
Methodist University of Piracicaba
2001-2015
Instituto Federal Farroupilha
2014
National Council for Scientific and Technological Development
1900-2003
Departamento de Ciência e Tecnologia
1999
System Simulation (United Kingdom)
1997
Brazilian Agricultural Research Corporation
1994-1997
University of California System
1997
Soil water content profiles monitored as a function of time following steady-state infiltration conditions in field soil provide the only data necessary to estimate hydraulic conductivity content. For two proposed methods, it is assumed that redistributes response gravitational and an exponential Experiments were conducted on three fallow soils covered with plastic prevent evaporation sampled depths nearly 2 m. Values calculated by both methods well third recently reported method compared...
In recent years, the application of natural substances on crops has been intensified in order to increase resistance and yield soybean crop. Among these products are included plant biostimulants that may contain algae extracts, amino acids regulators their composition. However, there is little information isolated effect each constituents. The objective this research was evaluate antioxidant metabolism Experiments were carried out a greenhouse field with glutamate, phenylalanine, cysteine,...
In tropical agroecosystems, limited N availability remains a major impediment to increasing yield. A 15 N‐recovery experiment was conducted in 13 diverse agroecosystems. The objectives were determine the total recovery of one single application inorganic or organic during three six growing seasons and establish whether losses are governed by universal principles. Between 7 58% (average 21%) crop uptake first season derived from fertilizer. On average, 79% soil. When N‐labeled residues...
On-farm soybean yield has increased considerably in the last 50 years southern Brazil, but there is still little information about how selection and breeding for increase changed agronomic attributes of cultivars. The objectives this study were to evaluate changes yield, seed oil protein concentration, plant that might be associated with improvement 26 cultivars released over past sown simultaneously a common field environment two growing seasons. average rate gain was 45.9 kg ha
A software for the adjustment of soil water retention curves (SWRC) is presented, using twelve models found in literature.
Establishing a few sites in which measurements of soil water storage (SWS) are time stable significantly reduces the efforts involved determining average values SWS. This study aimed to apply new criterion—the mean absolute bias error (MABE)—to identify temporally for SWS evaluation. The performance MABE was compared with that commonly used criterion, standard deviation relative difference (SDRD). From October 2004 2008, four layers (0–1.0, 1.0–2.0, 2.0–3.0, and 3.0–4.0 m) measured, using...
Abstract The horizontal infiltration of water into uniform air‐dry soil columns is examined experimentally and theoretically. applicability the similar media concept to scaling soils having a wide textural range studied. microscopic characteristic length determined from plots distance wetting front as function square root time, in such way that these coalesce one line when expressed terms scaled coordinates. If diffusivity known, values by above method can be used estimate other soils.
The application of amino acids in crops has been a common practice recent years, although most the time they are associated with products based on algae extracts or fermented animal vegetable wastes. However, little is known about isolated effect development crops. Therefore, objective this research was to evaluate some steps soybean nitrogen metabolism and productivity. Experiments were carried out greenhouse field glutamate (Glu), phenylalanine (Phe), cysteine (Cys) glycine (Gly) as set...
Modeling techniques applied to agriculture can be useful define research priorities and understanding the basic interactions of soil-plant-atmosphere system. Using a model estimate importance effect certain parameters, researcher notice which factors most useful. The modeler should his objectives before beginning work construct that fulfills proposed objectives.
Drought events and water use conflicts drive the need for more efficient management in rice-growing areas of Brazilian Cerrado. Recent studies have shown advantages adopting water-saving irrigation region but a comprehensive assessment is needed. This study aims to model performance rice cultivation productivity tropical floodplains Cerrado biome northern Brazil response under contrasting seasonal rainfall levels. Twenty-seven scenarios cultivation, resulting from combination three sites,...
Surface soil moisture exhibits an important variability in terms of spatial and temporal domains, which may result critical uncertainties for agricultural water management. The purposes this study were (i) to characterize the dynamics stability surface 0-6 cm content θon a hill-slope; (ii) investigate issues related conditions including dominating factors on estimation mean θ. During period more than one month θwas measured thirteen days by Frequency Domain Reflectometry using 10 x m grid...
Macroporosity is often used in the determination of soil compaction. Reduced macroporosity can lead to poor drainage, low root aeration and degradation. The aim this study was develop test different models estimate macro microporosity efficiently, using multiple regression. Ten soils were selected within a large range textures: sand (Sa) 0.07-0.84; silt 0.03-0.24; clay 0.13-0.78 kg kg-1 subjected three compaction levels (three bulk densities, BD). Two with similar accuracy selected, mean...