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| EBERHARDT, I. D. R.; SCHULTZ, B.; RIZZI, R.; SANCHES, I. D.; FORMAGGIO, A. R.; ATZBERGER, C.; MELLO, M. P.; IMMITZER, M.; TRABAQUINI, K.; LUIZ, A. J. B.; FOSCHIERA, W.. |
| Abstract: The potential of optical remote sensing data to identify, map and monitor croplands is well recognized. However, clouds strongly limit the usefulness of optical imagery for these applications. This paper aims at assessing cloud cover conditions over four states in the tropical and sub-tropical Center-South region of Brazil to guide the development of an appropriate agricultural monitoring system based on Landsat-like imagery. Cloudiness was assessed during overlapping four months periods to match the typical length of crop cycles in the study area. The percentage of clear sky occurrence was computed from the 1 km resolution MODIS Cloud Mask product (MOD35) considering 14 years of data between July 2000 and June 2014. Results showed high... |
| Tipo: Artigo em periódico indexado (ALICE) |
Palavras-chave: Monitoramento agrícola; Clear sky coverage; Agriculture monitoring; Crop classification; MODIS; Sensoriamento remoto; Agricultura; Nuvem; Imagem de satélite; Remote sensing; Cloudiness. |
| Ano: 2016 |
URL: http://www.alice.cnptia.embrapa.br/handle/doc/1060359 |
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| AGUIAR, D. A.; MELLO, M. P.; NOGUEIRA, S. F.; GONÇALVES, F. G.; ADAMI, M.; RUDORFF, B. F. T.. |
| The unavoidable diet change in emerging countries, projected for the coming years, will significantly increase the global consumption of animal protein. It is expected that Brazilian livestock production, responsible for close to 15% of global production, be prepared to answer to the increasing demand of beef. Consequently, the evaluation of pasture quality at regional scale is important to inform public policies towards a rational land use strategy directed to improve livestock productivity in the country. Our hypothesis is that MODIS images can be used to evaluate the processes of degradation, restoration and renovation of tropical pastures. To test this hypothesis, two field campaigns were performed covering a route of approximately 40,000 km through... |
| Tipo: Artigo em periódico indexado (ALICE) |
Palavras-chave: EVI2 time series; Biophysical parameters; Phenological metrics; Biological degradation; Pasture reformation; Parâmetros biofísicos; Métricas fenológicas; Degradação biológica; Reforma de pastagens; Renovação de pastagens; Recuperação de pastagem. |
| Ano: 2017 |
URL: http://www.alice.cnptia.embrapa.br/handle/doc/1060956 |
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| AGUIAR, D. A.; SILVA, W. F.; MELLO, M. P.; SILVA, G. B. S. da; ADAMI, M.; RUDORFF, B. F. T.; CREPANI, E.; VARLEZ, M. A.. |
| The potential for Brazilian sugarcane ethanol production and exportation is linked, among others, to environmental sustainability and certification. The objective of this work was to present the major activities carried out within the context of the Canasat Project that can contribute to the compliance of some certification guidelines for sustainable sugarcane ethanol production. The microregion of Auriflama in the State of São Paulo, Brazil was selected as study area. Remote sensing images from TM, AWiFS, CCD and HRC sensors were used to: 1) map sugarcane crop for crop year 2009/10; 2) map sugarcane harvest practice (with and without straw burning) during crop year 2009/10; 3) sugarcane cultivation in permanent protected areas (APP) by law; 4) land use... |
| Tipo: Artigo em anais de congresso (ALICE) |
Palavras-chave: Sensoriamento remoto; Cana-de-açúcar; Área de preservação permanente; Mudança de uso e cobertura da terra. |
| Ano: 2011 |
URL: http://www.alice.cnptia.embrapa.br/handle/doc/902307 |
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