6 documents found, page 1 of 1
Temporal and Spatial Uncertainty of Erosion Soil Loss from an Argisol Under Sug...
Mendonça,Patrícia Gabarra; Teixeira,Daniel De Bortoli; Moitinho,Mara Regina; Silva Junior,João Fernandes da; Oliveira,Ismênia Ribeiro deABSTRACT The identification of erosion-susceptible areas is fundamental for the adoption of soil conservation practices. Thus, the best way to estimate the spatial pattern of soil erosion must be identified, in which the process uncertainties are also taken into consideration. The purpose of this study was to evaluate the spatial and temporal uncertainty of soil loss under two scenarios of sugarcane harvest man...
Magnetic and spectral signatures of Cerrado soils in the state of Goiás, Brazil
Fernandes,Kathleen Lourenço; Ribon,Adriana Aparecida; Marques Junior,José; Bahia,Angélica Santos Rabelo de Souza; Tavares Filho,JoãoAbstract: 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 magnetic susceptibility, respectively. Then, the spect...
USE OF SCALED SEMIVARIOGRAMS IN THE PLANNING SAMPLE OF SOIL PHYSICAL PROPERTIES...
Aquino,Renato Eleotério de; Campos,Milton César Costa; Marques Junior,José; Oliveira,Ivanildo Amorim de; Teixeira,Daniel De BortoliThere is a great lack of information from soil surveys in the southern part of the State of Amazonas, Brazil. The use of tools such as geostatistics may improve environmental planning, use and management. In this study, we aimed to use scaled semivariograms in sample design of soil physical properties of some environments in Amazonas. We selected five areas located in the south of the state of Amazonas, Brazil,...
USE OF SCALED SEMIVARIOGRAMS IN THE PLANNING SAMPLE OF SOIL CHEMICAL PROPERTIES...
Oliveira,Ivanildo Amorim de; Campos,Milton César Costa; Marques Junior,José; Aquino,Renato Eleotério de; Teixeira,Daniel de BortoliThe lack of information concerning the variability of soil properties has been a major concern of researchers in the Amazon region. Thus, the aim of this study was to evaluate the spatial variability of soil chemical properties and determine minimal sampling density to characterize the variability of these properties in five environments located in the south of the State of Amazonas, Brazil. The five environmen...
Variabilidade Espacial e Densidade Amostral da Suscetibilidade Magnética e dos ...
Oliveira,Ivanildo Amorim de; Marques Junior,José; Campos,Milton César Costa; Aquino,Renato Eleotério de; Freitas,Ludmila de; Siqueira,Diego SilvaA dificuldade em encontrar informações recentes sobre o comportamento espacial dos atributos dos solos na Região Amazônica tem sido preocupação de muitos pesquisadores. Em razão da grande dificuldade e dos custos para avaliar os atributos dos solos, têm-se utilizados métodos alternativos para predição de atributos do solo como a suscetibilidade magnética. Sendo assim, o objetivo deste trabalho foi avaliar a var...
Magnetic susceptibility to identify landscape segments on a detailed scale in t...
Barrios,Mariana dos Reis; Marques Junior,José; Panosso,Alan Rodrigo; Siqueira,Diego Silva; La Scala Junior,NewtonThe agricultural potential is generally assessed and managed based on a one-dimensional vision of the soil profile, however, the increased appreciation of sustainable production has stimulated studies on faster and more accurate evaluation techniques and methods of the agricultural potential on detailed scales. The objective of this study was to investigate the possibility of using soil magnetic susceptibility ...