Crop Calendar
Mostrando 1-11 de 11 artigos, teses e dissertações.
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1. Decision criteria for optimizing postemergence Johnsongrass control in soybean crops in Argentina.
Field studies were established in Zavalla and Oliveros, Argentina, during four years in order to optimize Johnsongrass (Sorghum halepense (L.) Pers.) chemical control by means of the thermal calendar model in comparison with other criteria (weed height or days after sowing). The effect of three application dates of postemergence herbicides was determined by
Pesquisa Agropecuaria Brasileira. Publicado em: 2011
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2. Soy production area estimates in Mato Grosso, Brazil, using MODIS NDVI time series.
Brazil is the second largest soy producer in the world, with an estimated crop of 57 million tons in 2008/2009 season (CONAB). Total planted area accounted for 21.7 million ha, 26% of which is located in Mato Grosso state (MT). Given the large extent of Brazilian soy production and its economical impact for both national and international markets, crop area
MEETING OF THE AMERICAN. Publicado em: 2011
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3. Crop discrimination using harmonic analysis of EVI MODIS time-series data / Discriminação de culturas agrícolas utilizando análise harmônica de séries temporais de dados EVI-MODIS
In the present decade, agriculture has increased worldwide in importance due to sensitive matters such as the current food crisis, biofuels boom, and the land use and land cover changes from savanna/forest areas to agriculture expansion. As a consequence, crop monitoring at regional and national scales has become essential at different levels of knowledge an
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/06/2008
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4. Discriminação de culturas agrícolas utilizando análise harmônica de séries temporais de dados EVI-MODIS / Crop discrimination using harmonic analysis of EVI MODIS time-series data
In the present decade, agriculture has increased worldwide in importance due to sensitive matters such as the current food crisis, biofuels boom, and the land use and land cover changes from savanna/forest areas to agriculture expansion. As a consequence, crop monitoring at regional and national scales has become essential at different levels of knowledge an
Publicado em: 2008
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5. Processing and characterization of fully and partial nanostructured alumina powders and ceramics / Processamento e caracterização de pós e de cerâmicas de alumina total e parcialmente nanoestruturadas
The opportune access to trustworthy agricultural information has become very important for the decision process of national and international agents. The use of remote sensing to map agricultural crops must consider their high dynamism, therefore the use of methods that consider their spectral-temporal profile is needed. The Mato Grosso State Brazil became o
Publicado em: 2007
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6. 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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7. Coeficientes de cultura (Kc) e crescimento vegetativo de âAcaià Cerradoâ (Cofeea arabica L.) associados a graus-dia (2 ano). / Crop coefficients (Kc) and vegetative growth of âAcaià Cerradoâ (Coffea arabica L.) associated to degree days (2nd year)
Crop coefficients (Kc) for arabic coffee plants are usually related to days after planting or Julian calendar, not considering the variation in the developing rates of the crop for places and years. There is a tendency for using meteorological variables, that consider the climatic effect on the lasting of the developing phases of crop. This study had the obj
Publicado em: 2006
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8. Dinâmica de inóculo de Alternaria solani, efeito da densidade de plantio na intensidade da pinta preta e requeima e previsão dessas doenças em tomateiro e batateira / Alternaria solani inoculum dynamics, effect of planting density in the intensity of early and late blight and systems of those diseases in tomato and potato
Several basic and applied epidemiological aspects, relative to early (Alternaria solani) and late (Phytophthora infestans) were studied to generate useful information for the management of these diseases in tomato and potato. The basic studies were conducted aiming to determine: dynamics of A. solani conidia in the air throughout the year; the survival of th
Publicado em: 2006
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9. CRESCIMENTO E DESENVOLVIMENTO DE GENÓTIPOS DE ARROZ (Oryza sativa L.) E DE BIÓTIPOS DE ARROZ VERMELHO (Oryza sativa L.). / Growth and development of cultivated Rice (Oryza sativa L.) genotypes and Red rice (Oryza sativa L.) biotypes.
Rice (Oryza sativa L.) constitutes the staple food of about half of the world`s population. Therefore, research on this crop has the potential of affecting the well being of a considerable number of people worldwide. Thermal time is a wide used method to tell time in plants, but this time concept is open to criticism. One of the goals of rice breeding progra
Publicado em: 2006
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10. Estimating summer crops area using TM/Landsat-5 data from pre-planting season / Imagens TM/Landsat-5 da época de pré-plantio para a previsão da área de culturas de verão
Estimation of cultivated areas with agricultural crops is important for economic policy making. In Brazil, there is a lack of objective techniques for that purpose. Remote sensing seems to be valuable for crop acreage estimations in a large scale. However, cloud cover at the time of summer season has impaired the use of optical remote sensing images for eval
Publicado em: 1998
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11. The earliest archaeological maize (Zea mays L.) from highland Mexico: New accelerator mass spectrometry dates and their implications
Accelerator mass spectrometry age determinations of maize cobs (Zea mays L.) from Guilá Naquitz Cave in Oaxaca, Mexico, produced dates of 5,400 carbon-14 years before the present (about 6,250 calendar years ago), making those cobs the oldest in the Americas. Macrofossils and phytoliths characteristic of wild and domesticated Zea fruits are absent from
The National Academy of Sciences.