Encontrados 10 documentos, a visualizar página 1 de 1
Rainfall erosivity estimation: Comparison and statistical assessment among meth...
Cardoso, Dione Pereira; Avanzi, Junior Cesar; Ferreira, Daniel Furtado; Acuña-Guzman, Salvador Francisco; Silva, Marx Leandro NavesTexto completo; Rainfall erosivity (R factor) is one of the six factors of the Universal Soil Loss Equation, being calculated based on the product of rainfall kinetic energy multiplied by its 30-minute maximum intensity. However, the lack of detailed and reliable rainfall data in many parts of the world has driven the use of other methods to estimate rainfall erosivity based on daily, monthly or annual data. Th...
Ajuste de modelos de platô de resposta para a exigência de zinco em frangos de ...
Rezende, Douglas Messias Lamounier Camargos; Muniz, Joel Augusto; Ferreira, Daniel Furtado; Silva, Fabyano Fonseca e; Aquino, Luiz Henrique deCom este trabalho, objetivou-se estudar a técnica platô de resposta utilizando modelos de regressão segmentada para avaliar sua aplicação no estudo da exigência de Zn em frango de corte. Foram utilizados os dados de uma pesquisa com frangos de corte envolvendo um experimento fatorial 2 x 2 x 9, dois experimentos, dois sexos e nove doses de zinco na ração, considerando 8 repetições. As doses de Zn estudados fora...
Plot size for evaluation of Arabica coffee yield
Moraes, Bráulio Fabiano Xavier de; Toledo, Fernando Henrique Ribeiro Barroso; Dias, Kaio Olímpio das Graças; Andrade, Vinícius TeixeiraIn most cases, in genetic breeding of Arabica coffee, plot size is defined in an empirical manner. It is often based only on the experience of the breeders and the availability of resources, potentially leading to a reduction in precision. Therefore, the aim of this study was to estimate the size of the experimental plot for evaluation of coffee yield. We evaluated two experiments for validation of cultivars wi...
Agrometeorological modeling for coffee productivity forecast in the south regio...
Victorino, Euler Cipriani; Carvalho, Luiz Gonsaga de; Ferreira, Daniel FurtadoKnowledge of effective crop forecasting techniques is of great importance for the coffee market, enabling better planning and making more sustainable this activity. This study aimed to adapt a predictive model of coffee yield, based on water availability, to the cities of Lavras and Varginha, in southern Minas Gerais, Brazil. The models were generated from multiple linear regression of productivity loss (Ye/Yp)...
Comparison of multivariate methods for studying the G×E interaction
Garbuglio, Deoclécio Domingos; Ferreira, Daniel Furtado; Araújo, Pedro Mário de; Gerage, Antonio Carlos; Shioga, Pedro SentaroThe objective of this work was to evaluate three statistical multivariate methods for analyzing adaptability and environmental stratification simultaneously, using data from maize cultivars indicated for planting in the State of Paraná-Brazil. Under the FGGE and GGE methods, the genotypic effect adjusts the G×E interactions across environments, resulting in a high percentage of explanation associated with a sma...
Meloidogyne paranaensis and Meloidogyne exigua in coffee plantation from the So...
Salgado, Sonia Maria Lima; Guimarães, Natálya Monique R. B.; Botelho, César Elias; Tassone, Guilherme A. T.; Marcelo, Ana LuizaThe cities in the South of Minas Gerais, which is the main coffee producer region in Brazil, would face a serious risk of productivity loss if more aggressive root-knot nematodes species, such as Meloidogyne paranaensis. In order to prevent the dissemination of this nematode, it is necessary to know the occurrence outbreaks and distribution of Meloidogyne spp. in this region. Then, objective was to investigate ...
Avaliação de carcaças de suínos da raça large white utilizando medidas convenci...
De Freitas, Rilke Tadeu Fonseca; De Gonçalves, Tarcísio Moraes [UNESP]; De Oliveira, Antonio Ilson Gomes; Ferreira, Daniel FurtadoSubmitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-27T11:21:11Z No. of bitstreams: 0Bitstream added on 2014-05-27T14:45:25Z : No. of bitstreams: 1 2-s2.0-31544467072.pdf: 114730 bytes, checksum: 2d53098dc0aa950d83a9f29c4f499146 (MD5); Made available in DSpace on 2014-05-27T11:21:11Z (GMT). No. of bitstreams: 0 Previous issue date: 2004-11-01; Conselho Nacional de Desenvolviment...
Evaluating the power and the size of multivariate Levene’s test using Monte Car...
Cirillo, Marcelo Angelo; Ferreira, Daniel Furtado; Sáfadi, ThelmaThis work aimed to evaluate the I-type error rate and the power of Levene’s multivariate test using different location parameters to compare k covariance matrices. Monte Carlo’s simulation and bootstrap were used for this purpose. Configurations were considered with different degrees of correlations, heterogeneity of covariance matrices, sample sizes and number of variants. Results showed that Levene’s multivar...
Comparison of the robustness of alternatives to the two sample test under non n...
Silva, Roberta Bessa Veloso; Ferreira, Daniel FurtadoThis work aimed to evaluate the risks of committing type I and type II errors in non normal populations by means of computational simulation and to compare three tests usually applied. It was compared the t test with the approach of the degrees of freedom proposed by Satterthwaite (1946), t with the degrees of freedom given by v = min (n1 - 1, n2 - 1) and bootstrap method under different distributions of probab...
Evaluation of the generalized likelihood ratio test of hypotheses on the geneti...
Gonçalves, Renata Pires; Bearzoti, Eduardo; Ferreira, Daniel FurtadoStudies of genetic control in plants are carried out to characterize genetic effects and detect the existence of a major gene and/or genes of minor effects (polygenes). If the trait of interest is continuous, the likelihood can be constructed based on a model with mixtures of normal densities. Once exact tests are not evident with such models, the likelihood ratio test is generally used, using the chi-square ap...