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

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

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

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

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

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

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

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

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

Author(s): OLIVEIRA, J. C.; FREITAS, I. C.; BARBOSA, D. L.; FERREIRA, E. A.; SIGNOR, D.; GONTIJO NETO, M. M.; FERNANDES, L. A.; CHERUBIN, M. R.; CERRI, C. E. P.; FRAZÃO, L. A.

Integrated farming systems are recognized as agricultural production models that enhance soil carbon storage. This study aimed to evaluate the influence of the tree component on the litter dynamics an... ...

Repository: BDPA     Publication year: 2024