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Exploring cause and effect relationships of soil fertility on corn yield variability. Author(s): COELHO, A. M.; DORAM, J. W.; SCHEPERS, J. S. In an experimenl conducted 10 asses lhe potencial causes of corn yield variabilily, the variation of phosphorus (P) and manganese (Mn), accounted for 79% of the variability in grain yield. Based on yi... ... Repository: BDPA Publication year: 2007
Variability of Myrciaria dubia genotypes (Myrtaceae) in native populations of Roraima state. Author(s): SOUZA, C. G.; PAIVA-RODRIGUES, R. M. S.; BARDALES-LOZANO, R. M.; CHAGAS, E. A.; GRANJA, F. Camu-camu, Myrciaria dubia (Myrtaceae) is a native species of the Amazon Rainforest that has been attracting attention worldwide and arousing great interest in the food and pharmacological industries... ... Repository: BDPA Publication year: 2020
A nonpaprametric approach to evaluate the impact of contextual variables on the agricultural research efficiency in Brazil. Author(s): SOUZA, G. da S. e; GOMES, E. G. In this paper we measure technical efficiency for each of Embrapa (Brazilian Agricultural Research Corporation) research centers. We model DEA efficiency as a function of contextual variables: revenue... ... Repository: BDPA Publication year: 2011
Environmental variables influencing the expression of morphological characteristics in clones of the forage cactus. Author(s): BARBOSA, M. L.; SILVA, T. G. F. da; ZOLNIERR, S.; SILVA, S. M. S. e.; FERREIRA, W. P. M. The environmental factors that affect the morphological characteristics of different genera of cacti are little known. The aim of this study therefore was to analyse the contribution of environmental... ... Repository: BDPA Publication year: 2018
Economic efficiency of Embrapa's research centers and the influence of contextual variables. Author(s): SOUZA, G. da S. e; GOMES, E. G.; MAGALHÃES, M. C.; AVILA, A. F. D. In this paper we measure, with a DEA BCC model, the economic efficiency of Embrapa's (Brazilian Agricultural Research Corporation) research centers. We model the DEA economic efficiency as a linear fu... ... Repository: BDPA Publication year: 2007
Models for predicting biometric variables in cowpea using multispectral aerial images. Author(s): ANDRADE JUNIOR, A. S. de; SOBRAL, A. H. S.; BASTOS, E. A.; PESSOA FILHO, F. N.; NUNES, L. P.; ROIG, H. Models based on vegetation indices (VI) from digital aerial images are promising for predicting biometric variables in agricultural crops. The objective of this study was to generate prediction models... ... Repository: BDPA Publication year: 2023
Genetic variability revealed by microsatellite markers in a germplasm collection of Jatropha curcas L. in Brazil: an important plant for biofuels. Author(s): SOUZA, R. de L.; DIAS, L. A. dos S.; CORRÊA, T. R.; CAIXETA, E. T.; FERNANDES, E. da C.; MUNIZ, D. R.; ROSMANINHO, L. B. de C.; CARDOSO, P. M. R. We evaluated the genetic variability of a collection of Jatropha curcas germplasm, represented by 93 accessions, using microsatellite markers. Among the 60 markers tested, five of them detected polymo... ... Repository: BDPA Publication year: 2019
Spatial variability of soil fertility in an integrated crop livestock forest system. Author(s): BERNARDI, A. C. de C.; PEZZOPANE, J. R. M.; ESTEVES, S. N.; PEDROSO, A. de F.; ALVES, T. C.; OLIVEIRA, P. P. A. Repository: BDPA Publication year: 2015
Genetic variability and morphological modifications in flooding tolerance in maize, variety BRS-4154. Author(s): FERREIRA, J. L.; COELHO, C. H. M.; MAGALHAES, P. C.; GAMA, E. E. G. e; BORÉM, L. Maize plants of the variety BRS 4154 - Saracura were evaluated in different cycles of recurrenl selection to determine genetic gains in flooding talerance, arranged in a random block design. The maize... ... Repository: BDPA Publication year: 2007
Influence of contextual variables: an application to agricultural research evaluation in Brazil. Author(s): SOUZA, G. da S. e; GOMES, E. G.; STAUB, R. B. Repository: BDPA Publication year: 2009

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