Angélica Santos Rabelo de Souza Bahia

São Paulo State University | Unesp · Departments of Soil and Animal Science

Sustainable intensification involves maintaining ecosystem balance and increasing productivity per animal per unit area. Phytogenic additives can be used as an alternative to achieve sustainable intensification. Tannins are phenolic compounds present in plants that are classified according to their chemical structure into hydrolyzable and condensed...

Sugarcane is one of the most important crops in the Brazilian agricultural market. Techniques that aim to increase the productivity and quality of raw materials, such as localized management, have been applied manually for many years by farmers and have great potential. This study aimed to determine sugarcane production environments using a reduced...

The concept of production environments, which is widely used to classify the yield potential of soils, and magnetic susceptibility (MS), is emerging as an important tool for mapping ultra-detailed areas. Given this background, this paper aims to evaluate the use of MS as a tool for the identification of areas with different potential the enhancing...

The application of pedotransfer functions for soil attribute estimation has economic and environmental advantages. However, the appropriate choice of models is essential to obtain high accuracy. The aim was of this study was to evaluate the magnetic susceptibility (χ) potential to estimate soil clay content and to compare the estimation accuracy us...

The use of diffuse reflectance spectroscopy (DRS) has gained prominence in the quantification of soil attributes due to its ease and practicality of obtaining data. This study aimed to evaluate the potential of different methodologies applied to spectral curves given by DRS to estimate kaolinite (Kt) and gibbsite (Gb), and their spatial variability...

Sequential extraction or chemical fractionation of heavy metals allows inferences to be made about their origin, occurrence, bioavailability, toxic potential and environmental contamination. Thus, the present study aimed to assess the distribution of Cu, Mn, Ni, Pb and Zn among the different soil fractions and landscape compartments of a yellow lat...

Environmental impacts can be more accurately assessed with the aid of spatial characterization of potentially toxic elements (PTEs). In fact, developing cost-effective, environmentally friendly spatial characterization methods for PTEs can facilitate the expeditious, accurate, detailed diagnosis of soil in large areas. In this study, we used three...

Agriculture is a great emission source of CO2 into the atmosphere, contributing significantly to the greenhouse effect. Considering the hypothesis that there are differences in soil carbon dynamics due to the distinct physiological and morphological characteristics of sugarcane cultivars, the aim of this study was to characterize the short-term soi...

Core Ideas We used VIS‐NIR spectroscopy and magnetic susceptibility to predict soil attributes. This paper shows the importance these tools for mapping large areas with detail scale. Indirect measurements are useful to characterize spatial variability of attributes. The maps predicted showed the same spatial pattern that the observed maps. The meth...

The objective of this work was to estimate the iron oxide contents (hematite and goethite) and to characterize the color and the spectral and magnetic signatures of Cerrado soils in the state of Goiás, Brazil. Six Oxisols and one Inceptisol were studied. Spectral and magnetic signatures were determined by diffuse reflectance spectroscopy (DRS) and...

The objective of this work was to verify soil color effectiveness for the identification of areas with different yield potentials and coffee quality, in an Ultisol developed from sandstone, in Planalto Ocidental Paulista, in the state of São Paulo, Brazil. One hundred seventy-three samples were collected from 39 ha, for the determination of hue, va...

Characterization of the soil and the grouping of its properties through main component analysis can assist in the classification and observation of the consequences of the conversion of native forest areas in pastures. Such data can aid in management practices. Considering the lack of studies in Cerrado soils of south-western Goias, developed metag...

Adsorbed phosphate in soils can be chemically extracted; however, this process is both time-consuming and not cost-effective if large numbers of samples have to be analysed. Indirect assessment of adsorbed phosphate by pedotransfer functions (PTFs) can help optimize fertilizer strategies. This study aimed to evaluate the spatial variability of adso...

Thiswork aims to evaluate the accuracy of different procedures using diffuse reflectance spectroscopy for estimation for iron oxides in the soil. Soil samples were collected at a depth of 0.00–0.20min two study areas,with iron oxide content ranging from 22 to 253 g kg−1. Hematite (Hm) and goethite (Gt) were quantified using two techniques: X-ray di...

Soil CO2 emission (FCO2) is one of the main sources of carbon release into the atmosphere. Moreover, FCO2 is related to soil attributes governing the transfer of gases from soil to the atmosphere. This study aimed fistly to describe the spatial variability of hematite (Hm), goethite (Gt), iron extracted with sodium dithionite citrate-bicarbonate (F...

Soil CO2 emission (FCO2) is a main contributor of atmospheric carbon transfer and is the subject of research aimed at developing effective methods for characterizing and mitigating CO2 emissions. The FCO2 is related to various soil properties including porosity, density and moisture, which are in turn related to gas transfer, O2 uptake and CO2 rele...

Studies analyzing the variability of clay minerals and magnetic susceptibility provide data for the delineation of site-specific management areas since many of their attributes are important to agronomy and the environment. This study aimed to evaluate the spatial variability of clay minerals, magnetic susceptibility, adsorbed phosphorus and phy...

A identificação dos teores de matéria orgânica (MO) do solo pode contribuir para a determinação de áreas de manejo especifico. No entanto as estimativas espaciais conduzidas neste processo apresentam incertezas e estas devem ser consideradas no processo de tomada de decisão. Neste estudo objetivou-se avaliar a incerteza na predição da variabilidade...

Carbon dioxide (CO2) is the greenhouse gas that has shown the most significant increases on its atmospheric concentration during the last years. According to the Intergovernmental Panel on Climate Change (IPCC), increasing of CO2 atmospheric concentration is the main cause of global warming, corresponding to around 60% of the enhanced greenhouse ef...

Resumo-Esse trabalho teve como objetivo estudar a variabilidade espacial dos atributos físicos de um latossolo, sob cultivo de cana-de-açúcar, na profundidade de 0-0,15 m. O estudo foi conduzido na Fazenda Santa Olga, pertencente à Usina Martinho, localizada na cidade de Guariba – SP. No local foi instalada uma malha irregular de 60 x 60 m contendo...

Aiming to verify the rooting of abiu cuttings the present research was realized using cuttings with 15 cm of length and treated with indolbutiric acid, in the doses of 0, 1000, 3000 and 5000 mg dm-3. The experiment were conducted in a nursery with intermitent artificial mist conditions of the Faculdade de Ciências Agrárias e Veterinárias – UNESP, J...