RETRACTED: Use of digital photography from unmanned aerial vehicles for estimation of leaf area index in onion (Allium cepa L.)

This article has been retracted: please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy).This paper has been retracted because a near identical version of this paper was published in the Journal Biosystems Engineering: J.I. Córcoles, J.F. Ortega, D. Hernández, & M.A. Moreno, (2013). Estimation of leaf area index in onion (Allium cepa L.) using an unmanned aerial vehicle. Biosystems Engineering. 115: 31–42; http://dx.doi.org/10.1016/j.biosystemseng.2013.02.002. This article represents a severe abuse of the scientific publishing system. The scientific community takes a very strong view on this matter and apologies are offered to readers of the journal that this was not detected during the submission process.