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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
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
Soft-sensor approach based on principal components analysis to improve the quality of the application of pesticides in agricultural pest control. Author(s): PEÑALOZA, E. A. G.; OLIVEIRA, V. A.; CRUVINEL, P. E. Repository: BDPA Publication year: 2018
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
Resources management and effective co-operation fo organisations in Amazonia: a discussion on the social component of recycling in the city of Belém. Author(s): VIEIRA, A. L.; PONTE, M. X.; FREITAS, A. C. R. de; KUBISCH, R. This paper alms to undstand the organisation process of recycling in Amazonia through the discussion of the social components of the sorting collection system mainly conducted by former farming famili... ... Repository: BDPA Publication year: 2006
Rootstock-scion interaction: 1. effect on the yield components of cabernet sauvignon grapevine. Author(s): MIELE, A.; RIZZON, L. A. A interação entre porta-enxerto, copa e meio ambiente pode induzir diferentes respostas à fisiologia da videira. Assim, o objetivo deste estudo foi determinar o efeito do porta-enxerto nos componentes... ... Repository: BDPA Publication year: 2017
Production, chemical components, and content of bioactive compounds of strawberry cultivars. Author(s): CARVALHO, S. F. de; CORRÊA, A. P. A.; FERREIRA, L. V.; VIZZOTTO, M.; ANTUNES, L. E. C. O número de cultivares de morangueiro disponíveis no Brasil é pequeno, sendo sua totalidade importada da América do Norte e da Europa. Desta forma, é de suma importância a introdução de novos materiai... ... Repository: BDPA Publication year: 2021
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
Principal component analysis for evaluating a ranking method used in the performance testing in sheep of Morada Nova breed. Author(s): SILVA, M. S. da; SHIOTSUKI, L.; LOBO, R. N. B.; FACO, O. Abstract: A multivariate approach was adopted to evaluate the relationship among traits measured in the performance testing of Morada Nova sheep, verify the efficiency of a ranking method used in thes... ... Repository: BDPA Publication year: 2015
Biomass components of Pennisetum purpureum cv. Roxo managed at different growth ages and seasons. Author(s): MARANHÃO, T. D.; CÂNDIDO, M. J. D.; LOPES, M. N.; POMPEU, R. C. F. F.; CARNEIRO, M. S. de S.; FURTADO, R. N.; SILVA, R. R. da; SILVEIRA, F. G. A. da Abstract: This study was carried out aiming to evaluate the biomass components of elephant grass cv. Roxo at seven growth ages, during rainy, transition and dry seasons. A completely randomized design... ... Repository: BDPA Publication year: 2018

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