Semivariogram
Mostrando 13-24 de 40 artigos, teses e dissertações.
-
13. Spatial soil sampling design using apparent soil electrical conductivity measurements
ABSTRACT Soil sampling is an important stage of digital soil mapping. The objective of this study was to characterize the spatial design of soil sampling using soil apparent electrical conductivity (ECa) and its optimized spatial sampling. For the characterization, it was used the Spatial Simulated Annealing (SSA) technique, incorporated on the software SANO
Bragantia. Publicado em: 29/09/2016
-
14. Spatial and temporal variability of soil electrical conductivity related to soil moisture
Soil electrical conductivity (ECa) is a soil quality indicator associated to attributes interesting to site-specific soil management such as soil moisture and texture. Soil ECa provides information that helps guide soil management decisions, so we performed spatial evaluation of soil moisture in two experimental fields in two consecutive years and modeled it
Sci. agric. (Piracicaba, Braz.). Publicado em: 2013-02
-
15. Avaliação de técnicas geoestatísticas no inventário de povoamentos de Tectona grandis L.f. / Evaluation of geostatistics in inventory of Tectona grandis L.f. stands
The general objective of this work was to evaluate if estimates of wood volume obtained from geostatistics techniques are more accurate than those obtained from classical statistical techniques.The study was conducted in stands of Tectona grandis L.f. with the dendometric volume trait measured in 101 plots laid along a sampling spacing with UTM coordinates,
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/06/2011
-
16. Variabilidade espacial de atritos físicos e químicos em solos de vale aluvial no semiárido de Pernambuco.
The study of soil hydraulic conductivity assumes high importance, being a parameter that measures the easiness which the soil‟s pores transmit water, being a relevant factor for the soil-water-plant system. Associated with this, another important parameter is the physical soil resistance to root penetration, which it has been the subject of extensive s
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2011
-
17. Eficiência da análise estatística espacial na classificação de famílias do feijoeiro - estudo via simulação / Efficiency of spatial statistical analysis in the classification of common bean families - the study via simulation
O objetivo deste trabalho foi avaliar a eficiência da análise Espacial, que considera erros dependentes espacialmente, para classificação de famílias de feijoeiro em relação às análises tradicionais em blocos casualizados e em látice que assumem erros independentes. Considerou-se diferentes graus de dependência espacial e de precisão experimental
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/02/2011
-
18. Spatial Variability of Some Soil Physical Properties in Three Soils of Sao Paulo, Brazil.
Volumetric core samples and loose soil samples were collected at 1 m interval in 10 m long transects, on three major soil groups in São Paulo, Brazil. The soil cores were used for soil desorption curves and the bulk density, and the loose soil was used for particle size analysis. The parameters obtained from the soil water retention model, bulk density and
Pesquisa Agropecuaria Brasileira. Publicado em: 2011
-
19. Spatial variability of some biometric attributes of sugarcane plants (variety IACSP93-3046) and its relation to physical and chemical soil attributes.
Tests to evaluate competition between plants, in general do not consider the soil spatial variability, nevertheless, the uniformity rarely is present and can not be assumed without verification. The aim of this work was to apply geostatistics to verify the spatial variability of the soil in an experimental field near Ribeirão Preto, SP, with sugarcane varie
Bragantia. Publicado em: 2011
-
20. Geostatistical analysis of crop yield maps in a long term no tillage system.
It is known, for a long time, that crop yields are not uniform at the field. In some places, it is possible to distinguish sites with both low and high yields even within the same area. This work aimed to evaluate the spatial and temporal variability of some crop yields and to identify potential zones for site specific management in an area under no-tillage
Bragantia. Publicado em: 2011
-
21. Zoneamento geotécnico com base em krigagem ordinária e equações multiquádricas: barragem de Itaipu / Geotechnical zoning based in ordinary kriging and multiquadric equations: Itaipu Hydroelectric Power Plant
This thesis presents a study based on the zoning of geotechnical parameters resulting from core boring, carried out in the basaltic bedrock located in the area of the Itaipu Hydroelectric Power Plant (Foz do Iguaçu - PR). These zonings were carried out based on the interpolation of the data by means of ordinary kriging and multiquadric equations. The data p
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/10/2010
-
22. GEOESTATÍSTICA E IMAGENS ORBITAIS PARA CARACTERIZAR A DISTRIBUIÇÃO ESPACIAL E DANOS DE LARVAS DE MELOLONTÍDEOS EM CEREAIS DE INVERNO / GEOSTATISTICS AND ORBITAL IMAGES FOR CHARACTERIZING THE SPATIAL DISTRIBUTION AND DAMAGES OF LARVAL MELOLONTÍDEOS IN WINTER CROPS
This study aimed to analyze the spatial distribution and use of orbital images for the identification of white grub damage. Will be presented in two chapters, the chapter one, presents the geostatistical characterization of white grub spatial distribution and chapter two describes the use of orbital images for the identification of white grub damage. Surveys
Publicado em: 2010
-
23. Classificação de desmatamento na Amazônia com o uso de semivariogramas obtidos de imagens SAR R99B / Classification of deforestation Amazon with semivariogram from SAR R99B images
O Sensoriamento Remoto permite a aquisição sistemática de informações sobre a superfície terrestre, bem como do mapeamento do incremento de desmatamento em floresta tropical. Um exemplo é o Projeto de Estimativa de Desflorestamento Bruto da Amazônia (PRODES), desenvolvido pelo Instituto Nacional de Pesquisas Espaciais (INPE). Este projeto realiza o m
Publicado em: 2009
-
24. Classificação de desmatamento na Amazônia com o uso de semivariogramas obtidos de imagens SAR R99B / Classification of deforestation Amazon with semivariogram from SAR R99B images
O Sensoriamento Remoto permite a aquisição sistemática de informações sobre a superfície terrestre, bem como do mapeamento do incremento de desmatamento em floresta tropical. Um exemplo é o Projeto de Estimativa de Desflorestamento Bruto da Amazônia (PRODES), desenvolvido pelo Instituto Nacional de Pesquisas Espaciais (INPE). Este projeto realiza o m
Publicado em: 2009