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Registros recuperados: 33
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Advance estimation of rice production in India using weather indices International Rice Research Institute
Rao, G. N.; Ramakrishna, Y. S.; Rao, A. V. R. K.; Rao, G. G. S. N..
p.56-58
Palavras-chave: Crop production; Weather; Estimates; Estimation.
Ano: 2003 URL: http://hdl.handle.net/123456789/1269
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As "águas de março" ficaram abaixo da média. Infoteca-e
CONCEIÇÃO, M. A. F..
2014
Tipo: Artigo de divulgação na mídia (INFOTECA-E) Palavras-chave: Jales; Chuva; Meteorologia; Weather; Rain.
Ano: 2014 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/987125
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Body size and abundance of Pseudohypocera kerteszi (Diptera, Phoridae) in nests of stingless bees (Apidae, Meliponini). Repositório Alice
ÕLIVEIRA, A. P. M. de; VENTURIERI, G. C.; LEÓN CONTRERA, F. A..
2012
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Morphometry; Pseudohypocera kerteszi; Bees; Weather; Phorid flies.
Ano: 2012 URL: http://www.alice.cnptia.embrapa.br/handle/doc/951673
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Chemical composition and photosynthetically active radiation of forage grasses under irrigation R. Bras. Zootec.
Silva,Edilane Aparecida da; Silva,Wilson Jesus da; Barreto,Antônio Carlos; Oliveira Junior,Antonio Barbosa de; Paes,José Mauro Valente; Ruas,José Reinaldo Mendes; Queiroz,Domingos Sávio.
The present study aimed to estimate the photosynthetically active radiation of tropical forage grasses in ten cutting dates, under irrigation. The following treatments were used: Brachiaria decumbens grass (Brachiaria decumbens cultivar Basilisk), Marandu grass (Brachiaria brizantha cultivar Marandu), Xaraes grass (Brachiaria brizantha, cultivar Xaraes), Mombaça grass (Panicum maximum cultivar Mombaça), Tanzania grass (Panicum maximum, cultivar Tanzania) and Tifton 85 grass (Cynodon spp cultivar Tifton 85). The weather parameters were collected by an automatic meteorological station installed in the location and used for irrigation management. The experiment was arranged in a split-plot completely randomized block design, considering the grasses as plots...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Forage production; Growth; Seasonality; Vegetation dynamics; Weather.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000300015
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Chuvas em fevereiro ficam abaixo da média. Infoteca-e
CONCEIÇÃO, M. A. F..
2014
Tipo: Artigo de divulgação na mídia (INFOTECA-E) Palavras-chave: Jales; Chuva; Meteorologia; Weather; Rain.
Ano: 2014 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/987128
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Chuvas em fevereiro superam a média do mês. Infoteca-e
CONCEIÇÃO, M. A. F..
2015
Tipo: Artigo de divulgação na mídia (INFOTECA-E) Palavras-chave: Jales; Chuva; Meteorologia; Weather; Rain.
Ano: 2015 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/1011481
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Contemporary Issues in Estimating Yield Distributions AgEcon
Pujula, Aude Liliana; Maradiaga, David Isaias; Dicks, Michael R..
In the research area of crop yield density estimation and in particular in risk analysis, little emphasis has been given to the appropriateness of transformation methods (e.g., removing a linear trend) and how such transformations impact the reliability of the empirical distribution functions and the resulting probability estimates. Similarly, there is little consensus on the impact of environmental variables (e.g., rainfall and temperature) on empirical distributions of yields. Using historical county corn yield data for Arkansas and Louisiana and nonparametric methods, this empirical analysis shed light on the importance of data transformation in crop risk analysis. Results demonstrate that inappropriate data treatment can lead to misestimation of...
Tipo: Conference Paper or Presentation Palavras-chave: Probability Density Estimation; Nonparametric; Kernel; Nonstationary; Unit Roots; Data Transformations; Corn Yields; Weather; Production Economics; Research Methods/ Statistical Methods; Risk and Uncertainty.
Ano: 2010 URL: http://purl.umn.edu/56527
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Efectos de un inusual periodo de alta frecuencia de huracanes sobre el bentos de arrecifes coralinos. OceanDocs
Alcolado, P. M.; Hernández Muñoz, D.; Caballero, H.; Busutil, L.; Perera, S.; Hidalgo, G..
En arrecifes coralinos del suroeste de Cuba, se evaluaron los impactos de la inusitada frecuencia e intensidad de huracanes entre el 2001 y el 2007, y de las enfermedades de corales, ambos factores asociados al cambio climático. En las crestas arrecifales, la reducción de la cobertura de coral duro vivo varió de nula a 21%, mientras que la reducción del diámetro máximo promedio de los corales varió de 16 a 40 cm. En los arrecifes frontales, la reducción de la cobertura de coral varió de nula a 14%, mientras que la reducción del diámetro máximo promedio varió de nula a 26 cm. Sin embargo, en todos los sitios se observaron grandes cambios en el predominio numérico de las especies. En las crestas, este se desplazó de Acropora palmata y otros corales duros a...
Tipo: Journal Contribution Palavras-chave: 1462; Hurricanes; Weather; Diseases; Coral reefs; Hurricanes; Weather; Coral reefs; Diseases; Http://aims.fao.org/aos/agrovoc/c_11650; Http://aims.fao.org/aos/agrovoc/c_15292; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_49879.
Ano: 2009 URL: http://hdl.handle.net/1834/4094
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Effect of seasonal conditions and milk management practices on bulk milk quality in Minas Gerais State - Brazil Arq. Bras. Med. Vet. Zootec.
Picinin,L.C.A.; Bordignon-Luiz,M.T.; Cerqueira,M.M.O.P.; Toaldo,I.M.; Souza,F.N.; Leite,M.O.; Fonseca,L.M.; Lana,A.M.Q..
ABSTRACT The influence of seasonality and the training and implementation of good dairy farming practices on raw milk production and quality was evaluated on dairy farms in Minas Gerais State, Brazil. The physico-chemical composition, somatic cell count (SCC) and total bacterial count (TBC) were determined in 3,096 milk samples collected from bulk tanks originated from 43 dairy farms over a three-year period and correlated with key climatic factors. The recommended milking management practices were applied through a training program and correlated with the seasonal data in three stages: I) prior to training (dry period); II) 48 days after the training (transition period); III) 96 days after the training (rainy period). In the first stage, a diagnosis of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Raw milk; Weather; Total bacteria count; Somatic cell count; Dairy farm.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352019000401355
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Estudo da FAPAR em regiões fitoecológicas brasileiras através de série temporal derivada do NDVI/AVHRR. Repositório Alice
OLIVEIRA, L. M. T. de; FRANÇA. G. B.; COSTA, T. C. e C. da; ANTUNES, M. A. H.; FRANÇA, J. R. de A..
The objective of this work is to study the behavior of Brazilian vegetation throughout time series of Fraction of Photosynthetically Active Radiation (FAPAR) absorbed by a plant canopy derived from vegetation index of the A VHRR sensor; observing the variations of the types of vegetation, influences and relationships with the cIimate. The F AP AR dataset has spatial resolution of 0.1 °xO.1 o and temporal resolution of 10 days for the period 1982 to 1999. The data were investigated considering the seasonal and interannual variations for phytoecological regions of the country. The FAPAR results show: the largest values were observed in Evergreen Broadleaf Forests (Dense and Open) and Campinarana, the lesser amplitude of variation of FAPAR occur in Savanna...
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Phytoecological regions; A VHRR; Weather; F AP AR; Regiões fitoecológicas; Tempo.
Ano: 2009 URL: http://www.alice.cnptia.embrapa.br/handle/doc/491976
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Extreme events of precipitation in the rainy season of the state of Bahia. Repositório Alice
DOURADO, C. S.; AVILA, A. M. H. de; OLIVEIRA, S. R. de M..
Abstract: The increase of frequency and intensity of extreme precipitation events has generated consequences for biodiversity of natural systems, economic and life losses. In particular, the state of Bahia has been the scene of an increase of severe droughts in almost its entirety and outbreaks of floods that serve as a warning to the future. In this regard, the objective of this work was to analyze the frequency of occurrence of extreme events of precipitation between 1981 and 2010 of Bahia.
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Precipitação; Clusterização; Zonas pluviométricas; Quantis; Fenômenos extremos; Sistemas meteorológicos; Rainfall zones; Quantiles; Extreme phenomena; Weather systems; Rain; Cluster analysis; Weather.
Ano: 2013 URL: http://www.alice.cnptia.embrapa.br/handle/doc/968932
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Have Biotech Seeds Increased Maize Yields? AgEcon
Xu, Zheng; Hennessy, David A.; Moschini, GianCarlo.
Corn yield is determined by soils, weather, seed used and other technology choices. Global population and per capita income growth trends as well as demand from the energy sector have placed great stress on cropland use. Global cropland acres and/or yield per acre will need to increase. Whether new seed technologies have enhanced corn yield is a controversial issue. We study U.S. county corn yields 1964-2008, controlling for location effects, fertilization technologies and weather. We find evidence that trend yield growth has been fastest in the Central Corn Belt, genetic modification technologies have increased trend yield, and this increase has been largest in the Central Corn Belt.
Tipo: Conference Paper or Presentation Palavras-chave: Biotechnology; Corn Yield; Trend; Regional Effects; Weather; Fertilization.; Crop Production/Industries; Industrial Organization; Research and Development/Tech Change/Emerging Technologies; L65; Q16.
Ano: 2010 URL: http://purl.umn.edu/61303
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Households’ characteristics and perceptions of weather variability impact on rice yield: empirical analysis of small scale farmers in Tanzania Ciência Rural
Kulyakwave,Peter David; Shiwei,Xu; Yu,Wen.
ABSTRACT: Rice farming is characterized by various factors including environmental and non-environmental factors. The current paper analyses the influence of households’ characteristics, and perceptions of weather variability on rice yield. Authors used primary data collected from small-scale rice farmers in the Mbeya region of Tanzania. Garret technique and Stata software were used for data analyses. Results confirmed that farmer’s education, marital status, gender, and land ownership have a positive influence on rice yield. Thus, for every 1% increase in each variable increases rice yield by 14%, 98%, 26%, and 21% respectively. Owing to empirical results on farmers’ perceptions, it is confirmed that if the drought period increased by 1%, would on...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Rice yield; Weather; Perceptions; Empirical analysis; Tanzania.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019001100200
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Identifying the Impact of Weather Variation on Crop Yield in the Northern Plains AgEcon
Jiang, Yong; Koo, Won W..
Tipo: Conference Paper or Presentation Palavras-chave: Weather; Production; Crop yield; Agriculture; Economics; Crop Production/Industries; Land Economics/Use; Production Economics; Productivity Analysis; Resource /Energy Economics and Policy.
Ano: 2011 URL: http://purl.umn.edu/104508
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Janeiro: muito sol e pouca chuva em Jales Infoteca-e
CONCEIÇÃO, M. A. F..
2014
Tipo: Artigo de divulgação na mídia (INFOTECA-E) Palavras-chave: Jales; Chuva; Meteorologia; Weather; Rain.
Ano: 2014 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/986857
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Kansas Grain Supply Response to Economic and Biophysical Factors, 1977-2007 AgEcon
Boussios, David; Barkley, Andrew P..
This research identifies and quantifies the impact of biophysical and economic variables on Kansas grain supply for the period 1977- 2007. This research estimates total supply response by aggregating yield and acreage responses. Previous methods have effectively analyzed the response of crop supply through either acreage or yield responses. However, the method proposed in this research incorporates both yield and acreage response to various production variables through recursive modeling. The results include the negative impact of acreage expansion on aggregate yields and thus the impact on total supply. The results also show that previous methods underestimate supply response elasticities by as much as 97%. Furthermore, this research estimates supply...
Tipo: Presentation Palavras-chave: Yield; Acreage; Supply; Grain; Extensive Margin; Producer Expectations; Climate; Weather; Agribusiness; Agricultural and Food Policy; Crop Production/Industries; Environmental Economics and Policy; Land Economics/Use; Production Economics; Resource /Energy Economics and Policy.
Ano: 2012 URL: http://purl.umn.edu/124385
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Massa de ar frio derruba temperatura em Jales. Infoteca-e
CONCEIÇÃO, M. A. F..
2014
Tipo: Artigo de divulgação na mídia (INFOTECA-E) Palavras-chave: Jales; Clima; Meteorologia; Temperatura; Frio; Weather; Climate; Meteorology and climatology; Cold zones.
Ano: 2014 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/987730
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Predicting the quality and prices of Bordeaux wines AgEcon
Ashenfelter, Orley.
Bordeaux wines have been made in much the same way for centuries. This article shows that the variability in the quality and prices of Bordeaux vintages is predicted by the weather that created the grapes. The price equation provides a measure of the real rate of return to holding wines (about 2–3% per annum) and implies far greater variability in the early or ‘en primeur’ wine prices than is observed. The analysis provides a useful basis for assessing market inefficiency, the effect of climate change on the wine industry and the role of expert opinion in determining wine prices.
Tipo: Working or Discussion Paper Palavras-chave: Wine quality; Wine prices; Weather; Bordeaux wine; Wine auctions; Demand and Price Analysis; Environmental Economics and Policy.
Ano: 2007 URL: http://purl.umn.edu/37297
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Pre-harvest Forecasting of County Wheat Yield and Wheat Quality Conditional on Weather Information AgEcon
Lee, Byoung-Hoon; Kenkel, Philip L.; Brorsen, B. Wade.
Wheat regression models that account for the effect of weather are developed to forecast wheat yield and quality. Spatial lag effects are included. Wheat yield, protein, and test weight level are strongly influenced by weather variables. The forecasting power of the yield and protein models was enhanced by adding the spatial lag effect. Out of sample forecasting tests confirm the models’ usefulness in accounting for the variations in average wheat yield and qualities.
Tipo: Conference Paper or Presentation Palavras-chave: Prediction; Protein; Spatial lag; Test weight; Weather; Wheat yield; Agribusiness; Environmental Economics and Policy; Farm Management; Production Economics; Productivity Analysis; Risk and Uncertainty.
Ano: 2011 URL: http://purl.umn.edu/98829
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Pricing Weather Derivatives AgEcon
Richards, Timothy J.; Manfredo, Mark R.; Sanders, Dwight R..
This paper presents a general method for pricing weather derivatives. Specification tests find that a temperature series for Fresno, California follows a mean-reverting Brownian motion process with discrete jumps and ARCH errors. Based on this process, we define an equilibrium pricing model for cooling degree day weather options. Comparing option prices estimated with three methods: a traditional burn-rate approach, a Black-Scholes-Merton approximation, and an equilibrium Monte Carlo simulation reveals significant differences. Equilibrium prices are preferred on theoretical grounds, so are used to demonstrate the usefulness of weather derivatives as risk management tools for California specialty crop growers.
Tipo: Working or Discussion Paper Palavras-chave: Derivative; Jump-diffusion process; Mean-reversion; Volatility; Weather; Demand and Price Analysis.
Ano: 2004 URL: http://purl.umn.edu/28536
Registros recuperados: 33
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