Agricultural Crop Area Estimation
Mostrando 1-12 de 14 artigos, teses e dissertações.
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1. Mapeamento da área cultivada e estimativa do rendimento de grãos de arroz irrigado a partir de modelos agrometeorológicos-espectrais para o Rio Grande do Sul / Crop area mapping and crop rice yields estimation using agrometeorological-spectral models for Rio Grande do Sul state, Brazil
The objective of this study was to characterize the irrigated rice crop at Rio Grande do Sul State and to test a methodology to define the cultivated area and to estimate the grain yield through the adjustment of the agrometeorological-spectral models. The study was developed for the six rice-growing regions of Rio Grande do Sul. Data of the irrigated rice g
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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2. Numerical modeling of actual evapotranspiration of a coffee crop
The evapotranspiration estimation has great importance to crop productivity and agricultural water management. In this study, evapotranspiration is analyzed in a coffee (Coffea arabica L.) crop located in Piracicaba, state of São Paulo (Brazil) using a numerical method based on the simulation of both water flow and crop activity in the unsaturated zone of t
Scientia Agricola. Publicado em: 2011-08
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3. Monitoring sugar cane crop plantations in São Paulo state using spot vegetation images and meteorological data / Monitoramento da cultura de cana-de-açucar no Estado de São Paulo por meio de imagens spot vegetation e dados meteorologicos
O atual sistema de previsão de safras para a cultura da cana-de-açúcar utilizado no Brasil depende, em boa parte, de informações subjetivas, baseadas no conhecimento de técnicos do setor e informações da cadeia produtiva. Apesar da experiência dos técnicos envolvidos, este sistema está sujeito a questionamentos sobre a qualidade dos números apres
Publicado em: 2009
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4. Water and energy fluxes in cowpea and castor beans cultivated in northeast Brazil / Fluxos de Ãgua e de energia em feijÃo macassar e mamona no nordeste do Brasil
The castor beans and cowpea are crops of enormous economic and social importance for the farmers in northeast Brazil, whereas the extracted oil of seeds of castor beans is used for production of biodiesel and the cowpea is the main food for poor population. Independent of crop type, the knowledge of water amount removed from soil by vegetation is of great in
Publicado em: 2009
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5. Estratificação espacial para estimativa da área de culturas agrícolas de verão com imagens de pré-plantio / Spatial stratification for area estimate of summer agricultural crops using pre-planting images
O levantamento da área agrícola é uma informação fundamental para o planejamento agrícola, econômico, agrário, ambiental, ou social. Recomenda-se que o cálculo da área agrícola seja por vias probabilísticas e de forma estratificada. A estratificação tem como principais benefícios a redução da variância global e a otimização da verificaç�
Publicado em: 2008
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6. Estratificação espacial para estimativa da área de culturas agrícolas de verão com imagens de pré-plantio / Spatial stratification for area estimate of summer agricultural crops using pre-planting images
O levantamento da área agrícola é uma informação fundamental para o planejamento agrícola, econômico, agrário, ambiental, ou social. Recomenda-se que o cálculo da área agrícola seja por vias probabilísticas e de forma estratificada. A estratificação tem como principais benefícios a redução da variância global e a otimização da verificaç�
Publicado em: 2008
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7. Biological characteristics and herbicide susceptibility of five weed species of the Amaranthus genus. / Características biológicas e suscetibilidade a herbicidas de cinco espécies de plantas daninhas do gênero Amaranthus
Plant species classified in the Aramanthus genus are frequently found infesting brazilian agricultural areas, although there are few researches that evaluated the biological characteristics and the control of these species. Therefore, this work was conducted with the objective of analyzing the germination, the growth and the development, estimating the leaf
Publicado em: 2007
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8. THE UNSUSTAINABILITY OF SOIL USE WITH TABACCO CROP ON STEEP SLOPES / A INSUSTENTABILIDADE DO USO DO SOLO COM FUMICULTURA EM TERRAS DECLIVOSAS
Areas susceptibility to water erosion and strong pressure of soil use, as in Southern Brazil, where there is cultivation of tobacco, are prone to degradation of the natural resources. The objective of this dissertation was to evaluate the unsustainability of the natural resources in a watershed under tobacco production, characterized by steep slopes, with in
Publicado em: 2007
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9. Sensoriamento remoto para análise multitemporal da dinâmica de áreas agrícolas / Remote sensing for multitemporal analysis of crop land use dynamics
Agricultural statistics are important in a country like Brazil, where agriculture plays an important role over the economy. The methodologies for crop area estimates are commonly based on subjective data, and they present a non-probabilistic profile. In order to increase the quality of the results, the Geosafras Project uses remote sensing data associated to
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/06/2006
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10. Aplicação de logica fuzzy para estimativa de area plantada da cultura de soja utilizando imagens AVHRR-NOAA / Application of fuzzy logic for soybean crop area estimation using AVHRR-NOAA images
An early accurate estimation of agricultural crop areas, such as soybean, is fundamental for the Brazilian economy. The draining forecast and the estimation of agricultural production commercialization are strategic to Brazil, since they are directly related to planning, costs and price. Recent technological progress of data acquisition from orbital remote s
Publicado em: 2005
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11. Classificação textural de imagens radarsat-1 para discriminação de alvos agrícolas. / Agricultural targets discrimination by textural classification of radarsat-1 imagery.
Remote sensing images from the visible and infrared regions of the electromagnetic spectrum have demonstrated a great potential to identify and discriminate agricultural areas for crops estimation. However, cloud cover is an obstruction for this type of image acquisition. On the other hand, Synthetic Aperture Radar (SAR) images acquired in the microwave regi
Publicado em: 2004
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12. Estimativa de áreas agrícolas por meio de técnica de sensoriamento remoto, geoprocessamento e amostragem / Crop area estimation using remote sensing, geoprocessing and sample techniques
Efficient estimates of agricultural production require practical and rapid methods for its accomplishment. In this context, the use of computer to speed up the involved processes during the estimates is important. Thus, the present work comes to contribute with the automation of the procedures for stratification and allocation of samples to estimate the cult
Publicado em: 2003