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A kukorica és a vágósertés felvásárlási árának és mennyiségének ciklikussága AgEcon
Hegedusne Baranyai, Nora.
A vizsgálatok a rendszerváltozást követő időszakra vonatkozó piaci folyamatok – árak, felvásárolt mennyiségek – havi változásainak elemzésére irányultak. Célként fogalmazódott meg annak a hipotézisnek az igazolása, miszerint piacgazdasági körülmények között nem elhanyagolható rövid távú ciklikus ingadozásokkal szükséges számolni. A kukorica felvásárlási áránál öt teljes ciklus figyelhető meg az ár alakulásában 1992 januárja és 2011 januárja között. A ciklikus periódusok hossza 3-4 évre tehető. A vágósertésnél szintén öt ciklus rajzolódott ki a vizsgált időszakban. A hullámok hossza változó volt. A sertésáraknál a leghosszabbnak az utolsó előtti tekinthető, a maga három és fél évével. Vizsgálat tárgyát képezte a vonatkozó tényezők sztochasztikus...
Tipo: Article Palavras-chave: Felvásárlási ár és mennyiség; Kukorica; Vágósertés; Ciklikusság; Regresszió; Korreláció; Purchase price and quantity; Corn; Swine; Cyclic changes; Correlation; Regression analysis; Agricultural and Food Policy; Agricultural Finance.
Ano: 2011 URL: http://purl.umn.edu/119940
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A produtividade de arroz e algodão em função de parâmetros solo e clima no Projeto de Irrigação de São Gonçalo, Souza, PB. Infoteca-e
CORDEIRO, G. G.; VALDIVIESO SALAZAR, C. R.; CARVALLO GUERRA, H. O..
Parcelas indicadoras de producao, foram selecionadas no Projeto de Irrigacao de Sao Goncalo em Souza- PB, para estudar fatores relacionados com o solo e que influem na produtividade de arroz e algodao.
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) Palavras-chave: Projeto São Gonçalo; Correlação; Production factor; Natural resource.; Recurso natural; Arroz; Algodão; Irrigação; Produção; Solo.; Cotton; Correlation; Rice..
Ano: 1986 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/131825
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Agonistic behaviour and feed efficiency in juvenile Nile tilapia Oreochromis niloticus ArchiMer
De Verdal, Hugues; O'Connell, Catherine Maeve; Mekkawy, Wagdy; Vandeputte, Marc; Chatain, Beatrice; Bégout, Marie-laure; Benzie, John A.h..
Given the strong effects of behavioural hierarchies on growth in many cultured species and the key role of feed efficiency in aquaculture economics, understanding the nature of the interaction of these variables is important for the sustainability of aquaculture. The relationship between agonistic behaviour, growth and feed efficiency in Nile tilapia, Oreochromis niloticus, was studied by rearing 120 fish in eight aquaria. Fish were video-recorded to estimate the occurrence of agonistic behaviour during a fasting and a refeeding period. Growth, feed intake and feed conversion efficiency (FCE - calculated as the inverse of feed conversion ratio (FCR)) were subsequently measured individually for each fish. Fish showed 58% less agonistic traits during the...
Tipo: Text Palavras-chave: Agonstic behaviour; Feed efficiency; Nile tilapia; Performances; Correlation.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00483/59495/62363.pdf
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An Insurance Approach to Risk Management in the Ethanol Industry AgEcon
Paulson, Nicholas D.; Babcock, Bruce A.; Hart, Chad E.; Hayes, Dermot J..
The vast majority of crop and revenue insurance policies sold in the United States are single-crop policies that insure against low yields or revenues for each crop grown on the farm. But, increasingly, producer income is based more on the value of crops that have been converted into a value-added product such as ethanol. Moreover, the recent increases in energy and com-modity price levels and volatilities emphasize the importance of risk management to ethanol investors. This paper uses an insurance approach to outline a risk management tool which mimics the gross margin level of a typical corn-based ethanol plant. The gross margin, pre-mium, and indemnity levels are calculated on a per bushel basis to enable producers/investors to utilize the product...
Tipo: Journal Article Palavras-chave: Corn-based ethanol; Insurance; Risk management; Correlation; Monte Carlo; Resource /Energy Economics and Policy; Risk and Uncertainty.
Ano: 2008 URL: http://purl.umn.edu/44738
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Aplicação de método baseado em fractais para detecção de correlações entre imagens AVHRR-NOAA e dados agroclimáticos em regiões produtoras de cana-de-açúcar. Repositório Alice
ROMANI, L. A. S.; SOUSA, E. P. M. de; TRAINA JÚNIOR, C.; ZULLO JÚNIOR, J.; TRAINA, A. J. M..
O objetivo deste trabalho é identificar as correlações existentes entre variáveis obtidas a partir das imagens do sensor AVHRR/NOAA, como o NDVI, e variáveis agrometeorológicas. O trabalho apresenta a aplicação de um método baseado na teoria dos fractais para detecção de variáveis correlacionadas e identificação do conjunto de variáveis mais representativas para caracterizar o conjunto de dados. Uma série temporal de imagens AVHRR/NOAA foi fonte de dados para a avaliação do método de correlação fractal para a cultura de cana-de-açúcar nas principais áreas produtoras do estado de São Paulo, como será descrito na próxima seção.
Tipo: Anais e Proceedings de eventos Palavras-chave: Imagens de satélites; Processamento de imagens; Dados agroclimáticos; Regiões produtoras de cana-de-açúcar; Imagens AVHRR-NOAA; Teoria dos fractais; Inteligência artificial; Image processing; Agricultura; Sensoriamento Remoto; Remote sensing; Sugarcane; Correlation.
Ano: 2009 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/48882
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Assessment of micronutrient extractants from soils of Paraná, Brazil Rev. Bras. Ciênc. Solo
Sarto,Marcos Vinicius Mansano; Steiner,Fábio; Lana,Maria do Carmo.
In Brazil, plant-available micronutrients in the soil can be determined by several chemical extractants, the most common of which are dilute acid and chelating solutions. The purpose of this study was to assess the extractants 0.1 mol L-1 HCl, Mehlich-1, Mehlich-3 and DTPA for analysis of the micronutrients Cu, Zn, Fe, and Mn in soils from the state of Paraná. In samples from 12 soils (0-20 cm layer), wheat was planted (Triticum aestivum), grown for 42 days after emergence, and then bean (Phaseolus vulgaris) for 38 days. At the end of each planting period, the soil was sampled again. All extractants tested to assess the availability of Cu, Zn, Fe, and Mn correlated with each other. The efficiency of the extractants HCl, Mehlich-3 and DTPA in assessing...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil analysis; Correlation; Copper; Zinc; Iron; Manganese.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000600024
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Bayesian genetic parameters for body weight and survival of Nile tilapia farmed in Brazil PAB
Santos,Alexandra Inês; Ribeiro,Ricardo Pereira; Vargas,Lauro; Mora,Freddy; Alexandre Filho,Luiz; Fornari,Darci Carlos; Oliveira,Sheila Nogueira de.
The objective of this study was to estimate genetic parameters for survival and weight of Nile tilapia (Oreochromis niloticus), farmed in cages and ponds in Brazil, and to predict genetic gain under different scenarios. Survival was recorded as a binary response (dead or alive), during harvest time in the 2008 grow-out period. Genetic parameters were estimated using a Bayesian mixed linear-threshold animal model via Gibbs sampling. The breeding population consisted of 2,912 individual fish, which were analyzed together with the pedigree of 5,394 fish. The heritabilities estimates, with 95% posterior credible intervals, for tagging weight, harvest weight and survival were 0.17 (0.09-0.27), 0.21 (0.12-0.32) and 0.32 (0.22-0.44), respectively. Credible...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Oreochromis niloticus; Correlation; Fish genetic improvement; Gibbs sampling; GIFT strain; Heritability.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2011000100005
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Biometric Responses of Soybean to Different Potassium Fertilization Management Practices in Years with High and Low Precipitation Rev. Bras. Ciênc. Solo
Esper Neto,Michel; Minato,Evandro Antonio; Besen,Marcos Renan; Inoue,Tadeu Takeyoshi; Batista,Marcelo Augusto.
ABSTRACT Brazilian soybean producers commonly apply maintenance potassium (K) fertilization during cultivation to restore the K taken up by plants; however, this measure can modify the morphophysiological plant characteristics, since the functions of K are closely related with plant growth and development. This study assessed the morphological changes in soybean plants in response to K rates, sowing fertilization, and the application periods of K fertilization in a Latossolo Vermelho eutroférrico (Oxisol) under a no-tillage system, located in the municipality of Floresta, Paraná. A randomized block design was used in the experiment with four replications in a fully crossed factorial design (5 × 2 × 2). The experiment was carried out in two growing seasons...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Leaf area index; Correlation; Yield; Drought.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100525
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Caracterização fenotípica e genética da produção de leite e do intervalo entre partos em bubalinos da raça Murrah. Repositório Alice
RAMOS, A. de A.; MALHADO, C. H. M.; CARNEIRO, P. L. S.; GONÇALVES, H. C.; AZEVEDO, D. M. M. R..
O objetivo deste trabalho foi estimar as correlações, herdabilidades, repetibilidades, tendências genéticas e fenotípicas, e avaliar as distribuições univariada e bivariada da produção de leite e do intervalo entre partos, em fêmeas bubalinas da raça Murrah, paridas no período de 1982 a 2003. As tendências genéticas e fenotípicas foram estimadas pelas regressões das variáveis dependentes sobre o ano de parto, pelos métodos: regressão linear e regressão não paramétrica, utilizando-se a função de alisamento Spline. As herdabilidades estimadas foram 0,21 e 0,02, e as repetibilidades, 0,32 e 0,06, para a produção de leite e intervalo entre partos, respectivamente. As correlações genética, fenotípica e ambiental foram -0,22, 0,01 e 0,03, respectivamente. As...
Tipo: Artigo de periódico Palavras-chave: Análise bivariada; Correlação; Herdabilidade; Tendência genética; Bivariate analysis.; Genetic trend; Correlation; Heritability..
Ano: 2006 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/578046
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Choosing an appropriate real-life measure of effect size: the case of a continuous predictor and a binary outcome AgEcon
Conroy, Ronan M..
A case study of data on age and pregnancy is used to point up some morals for practicing data analysts, including the superiority of regression over t tests, exploratory scatterplot smoothing as a key method of checking form of relationship, and the value of logistic regression followed by adjust as a way of getting at the numbers of most interest.
Tipo: Journal Article Palavras-chave: Adjust; Correlation; Logistic regression; Regression; Scatterplot smoothing; T tests; Research Methods/ Statistical Methods.
Ano: 2002 URL: http://purl.umn.edu/116011
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Common factors method to predict the carcass composition tissue in kid goats R. Bras. Zootec.
Gomes,Helen Fernanda Barros; Gonçalves,Heraldo Cesar; Polizel Neto,Angelo; Cañizares,Gil Ignacio Lara; Roça,Roberto de Oliveira; Marques,Raquel Ornelas; Oliveira,Giuliana Micai de; Queiroz,Edicarlos Oliveira.
The objective of this work was to analyze the interrelations among weights and carcass measures of the longissimus lumborum muscle thickness and area, and of sternum tissue thickness, measured directly on carcass and by ultrasound scan. Measures were taken on live animals and after slaughter to develop models of multiple linear regression, to estimate the composition of shoulder blade, from selected variables in 89 kids of both genders and five breed groups, raised in feedlot system. The variables considered relevant and not redundant on the information they carry, for the common factor analysis, were used in the carcass composition estimate development models. The presuppositions of linear regression models relative to residues were evaluated, the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Co-linearity; Correlation; Evaluation; Goat; Regression.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000300007
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Comparison and correlation analysis of flavonoids and chlorogenic acid contents in different strains of Acer truncatum Ciênc. Tecnol. Aliment.
REN,Hongjian; FENG,Zhen.
Abstract The morphological characteristics, total flavonoid content (TFC) and chlorogenic acid (CGA) contents of leaves from different strains of Acer truncatum were analyzed with the goal of providing guidance for the development and utilization of Acer truncatum leaves (ATLs) and a selection system for the medicinal cultivar of Acer truncatum species. The morphological characteristics of the ATLs were determined using conventional methods, and TFC and CGA were used to determine the ATL extract by UV spectrophotometry and HPLC. The results showed that most traits significantly differed among the ATL morphologies of different strains and that considerable variability was found between different strains in both TFC (15.04 to 35.18 mg/g) and CGA (0.17 to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Acer truncatum leaves; Total flavonoids; Chlorogenic acid; Correlation; Classification; TOPSIS method.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612018000500319
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Comparison of methods for phenotypic stability analysis of cassava (Manihot esculenta Crantz) genotypes for yield and storage root dry matter content BABT
Kvitschal,Marcus Vinícius; Vidigal Filho,Pedro Soares; Scapim,Carlos Alberto; Gonçalves-Vidigal,Maria Celeste; Sagrilo,Edvaldo; Pequeno,Manoel Genildo; Rimoldi,Fabrício.
The objective of this work was to compare different phenotypic stability methods by using yield and storage root dry matter content data of eight cassava genotypes, assessed in eight environments in northwest of Paraná State, Brazil. All the methodologies applied showed to be able to study the stability of cassava genotypes, but each with its peculiarities. The methodologies of Eskridge, Annicchiarico and Lin and Binns were the most appropriated on situation with smaller effect of G x E interaction. The AMMI analysis and the Toler and Burrows methodology were the most specific on detailing specific adaptations of cassava genotypes to favorable and unfavorable environments. It could be suggested to use simultaneous AMMI analysis and Toler and Burrows...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Manihot esculenta; Correlation; Stability; Safety first indexes; Non-linear regression; AMMI analysis.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000100022
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Comprehensive Evaluation on Agricultural Structure and Correlation of Agricultural Internal Structure— A Case of Yimeng Mountainous Area AgEcon
Wu, Zhe; Xu, Jian-jian.
According to the relevant data from Chinese Statistical Yearbook, the overall agricultural structure and the internal structure of agriculture in Yimeng Mountain area are analyzed. The status quo of the agricultural and the internal structure of agriculture in Yimeng Mountain area are analyzed through the method of comprehensive appraisal of the improved factors. The safety coefficient of the comprehensive appraisal is from 2.626 696 to 4.987 546,which is exclude in the safety extent, so it needs adjusting. At the same time, the internal relations of the internal structure of agriculture in Yimeng Mountain area are studied by using the relativity analysis. The overall agricultural...
Tipo: Journal Article Palavras-chave: Yimeng Mountain area; Agricultural structure; Comprehensive appraisal method; Correlation; China; Agribusiness.
Ano: 2011 URL: http://purl.umn.edu/108399
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Controlling factors of ‘Caatinga’ and sugarcane evapotranspiration in the Sub-middle São Francisco Valley AGRIAMBI
Carvalho,Herica F. de S.; Moura,Magna S. B. de; Silva,Thieres G. F. da; Rodrigues,Carlos T. A..
ABSTRACT In the Sub-middle São Francisco Valley, the main controlling factors of ‘Caatinga’ and irrigated sugarcane ETr were investigated in this study. Between 2015 and 2016, environmental variables were measured by sensors coupled to two micrometeorological towers, one in the preserved ‘Caatinga’ and the other in an irrigated sugarcane crop. Soil moisture and vegetation cover index were also evaluated and biometric data were obtained only in the sugarcane. Actual evapotranspiration was determined based on the latent heat flux, by the energy balance method. Therefore, the ratio between actual and reference evapotranspiration was calculated. Response variables were formed by the actual evapotranspiration and by its ratio with the reference...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Correlation; Micrometeorological variables; Growth.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000400225
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Correlação entre contagem de células somáticas, california mastitis test e produção de leite em cabra leiteira. Repositório Alice
SILVA, E. R. da; ARAÚJO, A. M. de; ALVES, F. S. F.; PINHEIRO, R. R.; SAUKAS, T. N..
Tipo: Anais e Proceedings de eventos Palavras-chave: Célula somática; Correlação; Brasil; Ceará; Mastitis Test; Diagnostic; Production.; Caprino; Cabra leiteira; Mamite; Leite; Produção; Diagnóstico; Goats; Dairy goats; Milk production; Brazil; Mastitis; Disease diagnosis.; Correlation.
Ano: 1997 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/514863
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Correlating mesophilic counts to the pseudo-CMP content of raw milk Arq. Bras. Med. Vet. Zootec.
Raymundo,N.K.L.; Daguer,H.; Osaki,S.C.; Bersot,L.S..
RESUMO A presente comunicação objetivou avaliar a quantificação do caseínomacropeptídeo (CMP), bem como diferenciá-lo (devido à adulteração com soro) do pseudo-CMP (devido à proteólise bacteriana) em amostras de leite cru coletadas nos domicílios do sul do Brasil. Os resultados reforçam a necessidade de práticas higiênicas durante a ordenha e estocagem do leite. As amostras de leite estudadas não estavam adulteradas por adição de soro, mostrando que a análise por cromatografia de exclusão por tamanho deve ser complementada a fim de revelar a identidade do peptídeo (CMP ou pseudo-CMP). A contagem bacteriana total (TBC) também se mostrou útil como indicador da contaminação do leite por micro-organismos proteolíticos, uma vez que uma relação diretamente...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Chromatography; Correlation; Mesophilic counts; P-CMP; Uninspected milk.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352018000501660
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Correlating physical and sensory texture measurements of hearts of palm in conserve Ciênc. Tecnol. Aliment.
ORMENESE,Rita de Cássia Salvucci Celeste; BERBARI,Shirley Aparecida Garcia; REIS,Michele Gomes dos.
Abstract A study correlating the physical and sensory texture measurements of hearts of palm in conserve was carried out with a view to establishing an instrumental texture standard for this product. One hundred hearts of palm sticks in conserve from different brands, 50 of Açaí and 50 of Pupunha, were cut in half cross wise. One of the halves was used for the sensory evaluation and the other for the instrumental evaluation. Fifty consumers were instructed to bite each half-stick received in the crosswise direction and evaluate the hardness on a linear 10 cm scale and the acceptability of the hardness on a nine-point hedonic scale. The instrumental hardness was analyzed using the TA-XT2 texturometer. The Pearson correlation between the force required to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Hearts of palm; Texture; Sensory analysis; Correlation.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612016000400679
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Correlation between interleukin-18promoter -607C/A polymorphism and susceptibility to ischemic stroke BJMBR
Lu,Jian-xia; Lu,Zhong-qian; Zhang,Shao-lan; Zhi,Juan; Chen,Zheng-ping; Wang,Wan-xiang.
Single nucleotide polymorphisms in the promoter region ofinterleukin-18 (IL-18), an inflammatory cytokine, have been linked to susceptibility to many diseases, including cancer and immune dysfunction. Here, we explored the potential association between theIL-18 -607C/A (rs1946518) promoter region polymorphism and susceptibility to ischemic stroke (IS). This locus was amplified from peripheral blood samples of 386 IS patients (cases) and 364 healthy individuals (controls) by the polymerase chain reaction with sequence-specific primers. Significant differences were observed by the χ2 test in the -607C/A (rs1946518) genotype and allele frequencies between cases and controls (P < 0.05). Furthermore, after excluding for age, gender, smoking status, and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: IL-18; Polymorphism; Ischemic stroke; Correlation.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2013000600502
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Correlation between limestone dosis and mineral contents in tropical grass forage. Repositório Alice
ARMELIN, M. J. A.; PRIMAVESI, O.; PRIMAVESI, A. C.; SAIKI, M..
Tipo: Separatas Palavras-chave: Forrageira Tropical; Mineral.; Correlation; Limestone..
Ano: 2003 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/46346
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