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Assessment of heavy metals in soils of a vineyard region with the use of principal component analysis. Author(s): VALLADARES, G. S.; CAMARGO, O. A. de; CARVALHO, J. R. P. de; SILVA, A. M. C. Agricultural management with chemicals may contaminate the soil with heavy metals. The objective of this study was to apply Principal Component Analysis and geoprocessing techniques to identify the or... ... Repository: BDPA Publication year: 2009
Streamlined approaches for image classification using principal component analysis and hierarchical clustering of extrudates from coffee and sorghum blends. Author(s): HIDALGO CHÁVEZ, D. W.; SILVA, F. L. C. DA; PINTO, R. V.; CARVALHO, C. W. P. de; FREITAS-SILVA, O. This article describes simple methods to group images including principal component analysis (PCA) and hierarchical clustering of principal components (HCPC). Images of expanded and low expanded extru... ... Repository: BDPA Publication year: 2023
Heterosis performance in industrial and yield components of sweet corn. Author(s): ASSUNÇÃO, A.; BRASIL, E. M.; OLIVEIRA, J. P. de; REIS, A. J. dos S.; PEREIRA, A. F.; BUENO, L. G.; RAMOS M. R. Heterosis and its components were evaluated in a diallel crossing system of sweet corn. In the 38 treatments, eigth parents, 28 hybrids and two controls were used, arranged in a randomized block desig... ... Repository: BDPA Publication year: 2010
Determination of optimal number of independent components in yield traits in rice. Author(s): COSTA, J. A. da; AZEVEDO, C. F.; NASCIMENTO, M.; SILVA, F. F.; RESENDE, M. D. V. de; NASCIMENTO, A. C. C. The principal component regression (PCR) and the independent component regression (ICR) are dimensionality reduction methods and extremely important in genomic prediction. These methods require the ch... ... Repository: BDPA Publication year: 2022
Genetic analysis of yield component traits in cowpea [Vigna unguiculata (L.) Walp.]. Author(s): SANTOS, S. P. dos; ARAUJO, M. dos S.; ARAGAO, W. F. L. de; SILVA, K. J. D. e; ROCHA, M. de M. We investigated the genetic control of the three yield components in cowpea: number of grains per pod, pod length and grain size, in a biparental cross. Genetic parameters were estimated in generation... ... Repository: BDPA Publication year: 2024
Competition limits of the yield components of the common bean 'BRS Ártico' with white grains. Author(s): SILVEIRA, P. M. da; STONE, L. F. The objective of this study was to determine the limits of competition of yield components and ideal plant popula-tion for the common bean cultivar BRS Ártico, with white grains. Five plant population... ... Repository: BDPA Publication year: 2019
Biometric variability of goat populations revealed by means of principal component analysis. Author(s): PIRES, L. C.; MACHADO, T. M. M.; ARAUJO, A. M. de; OLSON, T. A.; SILVA, J. B. L. da; TORRES, R. A.; COSTA, M. da S. The aim was to analyze variation in 12 Brazilian and Moroccan goat populations, and, through principal component analysis (PCA), check the importance of body measures and their indices as a means of d... ... Repository: BDPA Publication year: 2012
Production components, grain yield and water use efficiency of irrigated cowpea. Author(s): IRENE FILHO, J.; ANDRADE JUNIOR, A. S. de; FERREIRA, J. O. P.; BLANCO, F. F.; CARDOSO, M. J. Cowpea cultivars, which are indicated for irrigated cropping, are recommended without proper assessment of their productive potential and water use efficiency in response to water regimes in the soil... ... Repository: BDPA Publication year: 2017
Canonical correlation among morphological traits and yield components of cowpea. Author(s): ABREU, H. K. A. de; FACHINELLI, R.; CECCON, G. The study of canonical correlation makes it possible to identify and quantify the associa-tions of morphological and productive characters with the performance of cultures. Due to the scarci-ty of stu... ... Repository: BDPA Publication year: 2021
Female fertility in a Guzerat dairy subpopulation: heterogeneity of variance components for calving intervals. Author(s): PANETTO, J. C. C.; VAL, J. E.; MARCONDES, C. R.; PEIXOTO, M. G. C. D.; VERNEQUE, R. da S.; FERRAZ, J. B. S.; GOLDEN, B. L. The objectives of the present study were to determine if variance components of calving intervals varied with age at calving and if considering calving intervals as a longitudinal trait would be a use... ... Repository: BDPA Publication year: 2012

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