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Registro Completo |
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
10/01/2017 |
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Data da última atualização: |
02/03/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
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. |
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Afiliação: |
ISAQUE DANIEL ROCHA EBERHARDT, UnB; BRUNO SCHULTZ, INPE; RODRIGO RIZZI, UFPel; IEDA DELÁRCO SANCHES, INPE; ANTONIO ROBERTO FORMAGGIO, INPE; CLEMENT ATZBERGER, University of Natural Resources and Life Sciences, Vienna; MARCIO PUPIN MELLO, The Boing Company; MARKUS IMMITZER, University of Natural Resources and Life Sciences, Vienna; KLEBER TRABAQUINI, Epagri; ALFREDO JOSE BARRETO LUIZ, CNPMA; WILLIAM FOSCHIERA, INPE. |
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Título: |
Cloud cover assessment for operational crop monitoring systems in tropical areas. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Remote Sensing, v. 8, n. 3, p. 1-14, 2016. |
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Idioma: |
Inglês |
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Conteúdo: |
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 seasonality of cloud occurrence within the crop year with strong variations across the study area. The maximum seasonality was observed for the two states in the northern part of the study area (i.e., the ones closer to the Equator line), which also presented the lowest averaged values (15%) of clear sky occurrence during the main (summer) cropping period (November to February). In these locations, optical data faces severe constraints for mapping summer crops. On the other hand, relatively favorable conditions were found in the southern part of the study region. In the South, clear sky values of around 45% were found and no signi?cant clear sky seasonality was observed. Results underpin the challenges to implement an operational crop monitoring system based solely on optical remote sensing imagery in tropical and sub-tropical regions, in particular if short-cycle crops have to be monitored during the cloudy summer months. To cope with cloudiness issues, we recommend the use of new systems with higher repetition rates such as Sentinel-2. For local studies, Unmanned Aircraft Vehicles(UAVs) might be used to augment the observing capability. Multi-sensor approaches combining optical and microwave data can be another option. In cases where wall-to-wall maps are not mandatory, statistical sampling approaches might also be a suitable alternative for obtaining useful crop area information. MenosAbstract: 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 seasonality of cloud occurrence within the crop year with strong variations across the study area. The maximum seasonality was observed for the two states in the northern part of the study area (i.e., the ones closer to the Equator line), which also presented the lowest averaged values (15%) of clear sky occurrence during the main (summer) cropping period (November to February). In these locations, optical data faces severe constraints for mapping summer crops. On the other hand, relatively favorable conditions were found in the southern part of the study region. In the South, clear sky values of around 45% were found and no signi?cant clear sky seasonality was observed. Results underpin the challenges to implement an operational cr... Mostrar Tudo |
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Palavras-Chave: |
Agriculture monitoring; Clear sky coverage; Cloudiness; Crop classification; Imagem de satélite; MODIS; Monitoramento agrícola. |
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Thesagro: |
Agricultura; Nuvem; Sensoriamento remoto. |
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Thesaurus Nal: |
Remote sensing. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/153098/1/2016AP07.pdf
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Marc: |
LEADER 03189naa a2200373 a 4500
001 2060359
005 2017-03-02
008 2016 bl uuuu u00u1 u #d
100 1 $aEBERHARDT, I. D. R.
245 $aCloud cover assessment for operational crop monitoring systems in tropical areas.$h[electronic resource]
260 $c2016
520 $aAbstract: 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 seasonality of cloud occurrence within the crop year with strong variations across the study area. The maximum seasonality was observed for the two states in the northern part of the study area (i.e., the ones closer to the Equator line), which also presented the lowest averaged values (15%) of clear sky occurrence during the main (summer) cropping period (November to February). In these locations, optical data faces severe constraints for mapping summer crops. On the other hand, relatively favorable conditions were found in the southern part of the study region. In the South, clear sky values of around 45% were found and no signi?cant clear sky seasonality was observed. Results underpin the challenges to implement an operational crop monitoring system based solely on optical remote sensing imagery in tropical and sub-tropical regions, in particular if short-cycle crops have to be monitored during the cloudy summer months. To cope with cloudiness issues, we recommend the use of new systems with higher repetition rates such as Sentinel-2. For local studies, Unmanned Aircraft Vehicles(UAVs) might be used to augment the observing capability. Multi-sensor approaches combining optical and microwave data can be another option. In cases where wall-to-wall maps are not mandatory, statistical sampling approaches might also be a suitable alternative for obtaining useful crop area information.
650 $aRemote sensing
650 $aAgricultura
650 $aNuvem
650 $aSensoriamento remoto
653 $aAgriculture monitoring
653 $aClear sky coverage
653 $aCloudiness
653 $aCrop classification
653 $aImagem de satélite
653 $aMODIS
653 $aMonitoramento agrícola
700 1 $aSCHULTZ, B.
700 1 $aRIZZI, R.
700 1 $aSANCHES, I. D.
700 1 $aFORMAGGIO, A. R.
700 1 $aATZBERGER, C.
700 1 $aMELLO, M. P.
700 1 $aIMMITZER, M.
700 1 $aTRABAQUINI, K.
700 1 $aLUIZ, A. J. B.
700 1 $aFOSCHIERA, W.
773 $tRemote Sensing$gv. 8, n. 3, p. 1-14, 2016.
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Registro original: |
Embrapa Meio Ambiente (CNPMA) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Agrossilvipastoril. Para informações adicionais entre em contato com cpamt.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Agrossilvipastoril. |
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Data corrente: |
07/11/2018 |
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Data da última atualização: |
07/11/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
MOMBACH, M. A.; PEREIRA, D. H.; PINA, D. do S.; PEREIRA, O. G.; BOLSON, D. C.; PEDREIRA, B. C. e. |
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Afiliação: |
MIRCÉIA ANGELE MOMBACH, UFMT, CUIABA; DALTON HENRIQUE PEREIRA, UFMT, SINOP; DOUGLAS DO SANTOS PINA, UFBA; ODILON GOMES PEREIRA, UFV; DHEYME CRISTINA BOLSON, UEM; BRUNO CARNEIRO E PEDREIRA, CPAMT. |
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Título: |
Rehydration of dry corn grain as an alternative for conservation purposes. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Australian Journal of Crop Science, v. 12, n. 9, p. 1472-1478, 2018. |
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ISSN: |
1835-2707 |
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Idioma: |
Português |
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Conteúdo: |
Glycerol, the main constituent of crude glycerin, has high energy efficiency and may provide energy to microorganisms in silage. Therefore, we evaluated the effect of including crude glycerin (CG) and a bacterial inoculant on the chemical composition, losses, fermentation profile, microbial population and aerobic stability of rehydrated corn grain silage. The dry corn grain (800 g kg-1 dry matter (DM)) was milled to 5 mm and rehydrated with water and glycerin to achieve 32.5% moisture content. Crude glycerin was added at 0, 75, 150 and 225 g kg-1 (natural matter (NM)), with or without bacterial inoculant. The experiment was randomized, and included three replicates in a factorial scheme, with or without bacterial inoculant, four crude glycerin levels and five fermentation periods. CG inclusion in silage decreased the nitrogenous and fibrous fractions, gas losses, DM recovery, and microbial growth. However, CG addition increased effluent and total DM losses. Treatment with 0 and 75 g kg-1 CG (NM) resulted in lower pH (4.6; 4.28) at 64 days of fermentation. Silage without CG remained stable to oxygen after 12 days. The bacterial inoculant did not influence the variables analyzed. We conclude that CG inclusion, bacterial inoculant or a combination of these additives is not recommended for this type of material. Nevertheless, rehydration with water (125 g kg-1 DM) is an alternative for storage of corn grain silage through the ensiling process. |
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Thesaurus NAL: |
Biofuels; Glycerol; Lactobacillus; Silage. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 02139naa a2200241 a 4500
001 2098917
005 2018-11-07
008 2018 bl uuuu u00u1 u #d
022 $a1835-2707
100 1 $aMOMBACH, M. A.
245 $aRehydration of dry corn grain as an alternative for conservation purposes.$h[electronic resource]
260 $c2018
520 $aGlycerol, the main constituent of crude glycerin, has high energy efficiency and may provide energy to microorganisms in silage. Therefore, we evaluated the effect of including crude glycerin (CG) and a bacterial inoculant on the chemical composition, losses, fermentation profile, microbial population and aerobic stability of rehydrated corn grain silage. The dry corn grain (800 g kg-1 dry matter (DM)) was milled to 5 mm and rehydrated with water and glycerin to achieve 32.5% moisture content. Crude glycerin was added at 0, 75, 150 and 225 g kg-1 (natural matter (NM)), with or without bacterial inoculant. The experiment was randomized, and included three replicates in a factorial scheme, with or without bacterial inoculant, four crude glycerin levels and five fermentation periods. CG inclusion in silage decreased the nitrogenous and fibrous fractions, gas losses, DM recovery, and microbial growth. However, CG addition increased effluent and total DM losses. Treatment with 0 and 75 g kg-1 CG (NM) resulted in lower pH (4.6; 4.28) at 64 days of fermentation. Silage without CG remained stable to oxygen after 12 days. The bacterial inoculant did not influence the variables analyzed. We conclude that CG inclusion, bacterial inoculant or a combination of these additives is not recommended for this type of material. Nevertheless, rehydration with water (125 g kg-1 DM) is an alternative for storage of corn grain silage through the ensiling process.
650 $aBiofuels
650 $aGlycerol
650 $aLactobacillus
650 $aSilage
700 1 $aPEREIRA, D. H.
700 1 $aPINA, D. do S.
700 1 $aPEREIRA, O. G.
700 1 $aBOLSON, D. C.
700 1 $aPEDREIRA, B. C. e
773 $tAustralian Journal of Crop Science$gv. 12, n. 9, p. 1472-1478, 2018.
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Embrapa Agrossilvipastoril (CPAMT) |
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